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<document id="6D253C228E81BEE639FFF296729628CA" ID-DOI="10.11646/zootaxa.5497.3.3" ID-ISSN="1175-5326" ID-Zenodo-Dep="13618519" ID-ZooBank="DF6104AA-AC3C-40F6-AD7C-4DC5F6384735" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725026324499" checkinUser="plazi" docAuthor="Ng, Peter K. L. &amp; Anker, Arthur" docDate="2024" docId="03DB87847A02FFC143A0FA184013FEED" docLanguage="en" docName="zootaxa.5497.3.3.pdf" docOrigin="Zootaxa 5497 (3)" docSource="http://dx.doi.org/10.11646/zootaxa.5497.3.3" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Gustavus holthuisae Ng &amp; Anker, 2024, sp. nov." docType="treatment" docVersion="3" lastPageNumber="378" masterDocId="FFE2FFFC7A03FFCB4337FFE7412DFFAC" masterDocTitle="A second species in the polychaete-associated crab genus Gustavus Ahyong &amp; Ng, 2009 (Decapoda: Brachyura: Aphanodactylidae)" masterLastPageNumber="380" masterPageNumber="369" pageNumber="370" updateTime="1725028075484" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
<mods:mods id="050847ABF2DDF8650F7EAA4302A4FD05" xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:title id="80CDBBC845F9278293A293BC44CFC4ED">A second species in the polychaete-associated crab genus Gustavus Ahyong &amp; Ng, 2009 (Decapoda: Brachyura: Aphanodactylidae)</mods:title>
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<mods:name id="EB99AA72BECB07E2E9896711189924C0" type="personal">
<mods:role id="CF2766BF508C008C7E430C5907D4AFFC">
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<mods:namePart id="E9D16243F4570822D84C058847577CBD">Ng, Peter K. L.</mods:namePart>
<mods:nameIdentifier id="231C3E8B9D5A33433947F81FAB0D1DBA" type="ORCID">0000-0001-5946-0608</mods:nameIdentifier>
<mods:nameIdentifier id="5910FBA08FA4B8A26D833145AFBE953F" type="email">peterng@nus.edu.sg</mods:nameIdentifier>
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<mods:role id="995B7A9E25CEC27BBCFA768A8D23537E">
<mods:roleTerm id="427CC1667145485A1F6B4BE2B8306BE0">Author</mods:roleTerm>
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<mods:namePart id="75829C92F9EC3DC92245A938AAB47864">Anker, Arthur</mods:namePart>
<mods:affiliation id="1B8780ACAF902317626EABCEF9D47DCD">Universidade Federal de Pelotas (UFPEL), Departamento de Ecologia, Zoologia e Genética, Instituto de Biologia, Campus Universitário Capão do Leão, RS, 96010 - 610, Brazil. E-mail &amp; Biological and Environmental Science &amp; Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.</mods:affiliation>
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<mods:title id="79C5BAC40B9742C8449DD1F2958B5934">Zootaxa</mods:title>
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<mods:date id="89E276173ADC289BC8441A1889D3993D">2024</mods:date>
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<mods:number id="D3FE769A477760ECB58D9B4E591F06DD">2024-08-26</mods:number>
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<mods:number id="E3702C0C37119BA1016B720F3694A226">5497</mods:number>
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<mods:number id="89196BF48E2BC19E76D0B41A405A71BD">3</mods:number>
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<mods:url id="BB7F1A26A52F55B0F2684C4BFC9D7F7F">http://dx.doi.org/10.11646/zootaxa.5497.3.3</mods:url>
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<mods:identifier id="EDCF76E08E2B882CFD984623EB6D1B9B" type="DOI">10.11646/zootaxa.5497.3.3</mods:identifier>
<mods:identifier id="F86A2ECF9AE9298659EA248579F7542A" type="ISSN">1175-5326</mods:identifier>
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<treatment id="03DB87847A02FFC143A0FA184013FEED" ID-DOI="http://doi.org/10.5281/zenodo.13618641" ID-Zenodo-Dep="13618641" LSID="urn:lsid:plazi:treatment:03DB87847A02FFC143A0FA184013FEED" httpUri="http://treatment.plazi.org/id/03DB87847A02FFC143A0FA184013FEED" lastPageId="10" lastPageNumber="378" pageId="1" pageNumber="370">
<subSubSection id="C36865197A02FFCA43A0FA1840DEF9B5" box="[151,499,1534,1561]" pageId="1" pageNumber="370" type="nomenclature">
<paragraph id="8BCD36927A02FFCA43A0FA1840DEF9B5" blockId="1.[151,499,1534,1597]" box="[151,499,1534,1561]" pageId="1" pageNumber="370">
<heading id="D08581FE7A02FFCA43A0FA1840DEF9B5" bold="true" box="[151,499,1534,1561]" fontSize="11" level="1" pageId="1" pageNumber="370" reason="1">
<emphasis id="B906EA807A02FFCA43A0FA1840DEF9B5" bold="true" box="[151,499,1534,1561]" pageId="1" pageNumber="370">
<taxonomicName id="4C724D117A02FFCA43A0FA1840A3F9B5" authorityName="Ng &amp; Anker" authorityYear="2024" box="[151,398,1534,1561]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="370" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A02FFCA43A0FA1840A3F9B5" bold="true" box="[151,398,1534,1561]" italics="true" pageId="1" pageNumber="370">Gustavus holthuisae</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A23557FB7A02FFCA42A2FA1840DEF9B5" box="[405,499,1535,1561]" pageId="1" pageNumber="370" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C36865197A02FFCA43A0F9C4403FF991" box="[151,274,1571,1597]" pageId="1" pageNumber="370" type="description">
<paragraph id="8BCD36927A02FFCA43A0F9C4403FF991" blockId="1.[151,499,1534,1597]" box="[151,274,1571,1597]" pageId="1" pageNumber="370">
(
<figureCitation id="13492A177A02FFCA43A8F9C44024F991" box="[159,265,1571,1597]" captionStart-0="FIGURE 1" captionStart-1="FIGURE 2" captionStart-2="FIGURE 3" captionStart-3="FIGURE 4" captionStart-4="FIGURE 5" captionStart-5="FIGURE 6" captionStartId-0="2.[151,250,1918,1942]" captionStartId-1="4.[151,250,1943,1967]" captionStartId-2="5.[151,250,1882,1906]" captionStartId-3="6.[151,250,1851,1875]" captionStartId-4="7.[151,250,1552,1576]" captionStartId-5="8.[151,250,1821,1845]" captionTargetBox-0="[151,1435,181,1894]" captionTargetBox-1="[193,1394,181,1919]" captionTargetBox-2="[151,1436,181,1858]" captionTargetBox-3="[151,1435,181,1828]" captionTargetBox-4="[151,1435,181,1528]" captionTargetBox-5="[158,1429,460,1791]" captionTargetId-0="figure-17@2.[151,1435,181,1894]" captionTargetId-1="figure-17@4.[193,1394,181,1919]" captionTargetId-2="figure-17@5.[151,1436,181,1858]" captionTargetId-3="figure-17@6.[151,1435,181,1828]" captionTargetId-4="figure-17@7.[151,1435,181,1528]" captionTargetId-5="figure-130@8.[151,1435,453,1798]" captionTargetPageId-0="2" captionTargetPageId-1="4" captionTargetPageId-2="5" captionTargetPageId-3="6" captionTargetPageId-4="7" captionTargetPageId-5="8" captionText-0="FIGURE 1. Gustavus holthuisae sp. nov., ovigerous female paratype (6.3 × 3.7 mm) from Thuwal, Saudi Arabia, FLMNH UF 72877, crab with terebellid polychaete host shortly after collection; A, general view of worm with crab; B, close-up of crab clinging to worm host. Photographs by A. Anker." captionText-1="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." captionText-2="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." captionText-3="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." captionText-4="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." captionText-5="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi-0="http://doi.org/10.5281/zenodo.13618521" figureDoi-1="http://doi.org/10.5281/zenodo.13618523" figureDoi-2="http://doi.org/10.5281/zenodo.13618525" figureDoi-3="http://doi.org/10.5281/zenodo.13618527" figureDoi-4="http://doi.org/10.5281/zenodo.13618529" figureDoi-5="http://doi.org/10.5281/zenodo.13618533" httpUri-0="https://zenodo.org/record/13618521/files/figure.png" httpUri-1="https://zenodo.org/record/13618523/files/figure.png" httpUri-2="https://zenodo.org/record/13618525/files/figure.png" httpUri-3="https://zenodo.org/record/13618527/files/figure.png" httpUri-4="https://zenodo.org/record/13618529/files/figure.png" httpUri-5="https://zenodo.org/record/13618533/files/figure.png" pageId="1" pageNumber="370">Figs. 1–6</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C36865197A02FFC843A0F98C443BFF54" lastPageId="3" lastPageNumber="372" pageId="1" pageNumber="370" type="materials_examined">
<paragraph id="8BCD36927A02FFCA43A0F98C40E8F82D" blockId="1.[151,1437,1642,1921]" pageId="1" pageNumber="370">
<emphasis id="B906EA807A02FFCA43A0F98C406FF928" bold="true" box="[151,322,1642,1669]" pageId="1" pageNumber="370">Type material</emphasis>
.
<materialsCitation id="3B1A3CCF7A02FFCA4262F98C4511F95D" collectingDate="2023-01-21" collectionCode="FLMNH, KAUST" collectorName="Technology &amp; A. Anker" country="Saudi Arabia" county="King Abdullah Monument" elevation="5" latitude="22.340609" location="Red Sea" longLatPrecision="1" longitude="39.08752" municipality="King Abdullah University of Science" pageId="1" pageNumber="370" specimenCode="UF 72876" specimenCount="1" typeStatus="holotype">
<typeStatus id="54C988307A02FFCA4262F98C40EFF929" box="[341,450,1643,1669]" pageId="1" pageNumber="370" type="holotype">Holotype</typeStatus>
: male (5.3 ×
<quantity id="4C8A9B777A02FFCA4153F98C43EDF929" box="[612,704,1643,1669]" metricMagnitude="-3" metricUnit="m" metricValue="3.4" pageId="1" pageNumber="370" unit="mm" value="3.4">3.4 mm</quantity>
) (
<collectionCode id="ED63AE577A02FFCA41EDF98C4213F929" box="[730,830,1643,1669]" country="USA" httpUri="http://grbio.org/cool/24h4-51mc" name="Florida Museum of Natural History" pageId="1" pageNumber="370" type="Museum">FLMNH</collectionCode>
<specimenCode id="DBD49EE97A02FFCA407DF98C42EEF929" box="[842,963,1643,1669]" collectionCode="UF" country="USA" lsid="urn:lsid:biocol.org:col:34858" name="Florida Museum of Natural History- Zoology, Paleontology and Paleobotany" pageId="1" pageNumber="370" type="Museum">UF 72876</specimenCode>
),
<collectingCountry id="F36576027A02FFCA40EDF98C455EF929" box="[986,1139,1643,1669]" name="Saudi Arabia" pageId="1" pageNumber="370">Saudi Arabia</collectingCountry>
,
<location id="8EAD60497A02FFCA47B5F98C45CEF929" LSID="urn:lsid:plazi:treatment:03DB87847A02FFC143A0FA184013FEED:8EAD60497A02FFCA47B5F98C45CEF929" box="[1154,1251,1643,1669]" country="Saudi Arabia" county="King Abdullah Monument" latitude="22.340609" longLatPrecision="1" longitude="39.08752" municipality="King Abdullah University of Science" name="Red Sea" pageId="1" pageNumber="370">Red Sea</location>
coast, Sta. RS-41,
<location id="8EAD60497A02FFCA43F1F9684033F905" LSID="urn:lsid:plazi:treatment:03DB87847A02FFC143A0FA184013FEED:8EAD60497A02FFCA43F1F9684033F905" box="[198,286,1679,1705]" country="Saudi Arabia" county="King Abdullah Monument" latitude="22.340609" longLatPrecision="1" longitude="39.08752" municipality="King Abdullah University of Science" name="Thuwal" pageId="1" pageNumber="370">Thuwal</location>
,
<collectingMunicipality id="6BA9ACE87A02FFCA4218F96843C9F905" box="[303,740,1679,1705]" pageId="1" pageNumber="370">King Abdullah University of Science</collectingMunicipality>
&amp;
<collectorName id="268753447A02FFCA4025F96842BBF905" box="[786,918,1679,1705]" pageId="1" pageNumber="370">Technology</collectorName>
(
<collectionCode id="ED63AE577A02FFCA409DF9684520F905" box="[938,1037,1679,1705]" pageId="1" pageNumber="370">KAUST</collectionCode>
), near
<collectingCounty id="62AC4E1E7A02FFCA4754F96844B5F905" box="[1123,1432,1679,1705]" pageId="1" pageNumber="370">King Abdullah Monument</collectingCounty>
,
<geoCoordinate id="EE4650557A02FFCA43A0F954401CF961" box="[151,305,1715,1741]" degrees="22.340608" direction="north" orientation="latitude" pageId="1" pageNumber="370" precision="1" value="22.340609">22.340608°N</geoCoordinate>
,
<geoCoordinate id="EE4650557A02FFCA4208F95540F8F961" box="[319,469,1714,1741]" degrees="39.087519" direction="east" orientation="longitude" pageId="1" pageNumber="370" precision="1" value="39.08752">39.087519°E</geoCoordinate>
, sand flat with fine sand near mangrove roots, less than
<quantity id="4C8A9B777A02FFCA4758F955459EF961" box="[1135,1203,1714,1741]" metricMagnitude="-1" metricUnit="m" metricValue="5.0" pageId="1" pageNumber="370" unit="m" value="0.5">
<elevation id="005FD1A17A02FFCA4758F955459EF961" box="[1135,1203,1714,1741]" metricMagnitude="-1" metricUnit="m" metricValue="5.0" pageId="1" pageNumber="370" unit="m" value="0.5">0.5 m</elevation>
</quantity>
at low tide, suction (yabby) pump, in terebellid tube, coll.
<collectorName id="268753447A02FFCA417CF9304398F95D" box="[587,693,1751,1777]" pageId="1" pageNumber="370">A. Anker</collectorName>
,
<date id="FFCC10527A02FFCA41F6F9304251F95D" box="[705,892,1751,1777]" pageId="1" pageNumber="370" value="2023-01-21">
<collectingDate id="EF88E9BA7A02FFCA41F6F9304251F95D" box="[705,892,1751,1777]" pageId="1" pageNumber="370" value="2023-01-21">21 January 2023</collectingDate>
</date>
[AA-22-520/M]
</materialsCitation>
.
<materialsCitation id="3B1A3CCF7A02FFCA4770F93040ECF82D" collectingDate="2023-01-21" collectionCode="FLMNH, RSRC, KAUST" collectorName="Technology &amp; A. Anker" country="Saudi Arabia" county="King Abdullah Monument" elevation="5" latitude="22.340609" location="Red Sea" longLatPrecision="1" longitude="39.08752" municipality="King Abdullah University of Science" pageId="1" pageNumber="370" specimenCode="ZRC 2023.0580, UF 72877, UF 72878" specimenCount="3" typeStatus="paratype">
<typeStatus id="54C988307A02FFCA4770F9304595F95D" box="[1095,1208,1751,1777]" pageId="1" pageNumber="370" type="paratype">Paratypes</typeStatus>
: 1 ovigerous female (7.3 × 4.0 mm) (
<specimenCode id="DBD49EE97A02FFCA427AF91C4325F8B9" box="[333,520,1786,1813]" collectionCode="ZRC" country="Singapore" httpUri="http://grbio.org/cool/16z4-1tbx" name="Zoological Reference Collection, National University of Singapore" pageId="1" pageNumber="370">ZRC 2023.0580</specimenCode>
), same collection data as for the holotype [AA-22-520/F]; 1 ovigerous female (6.3 ×
<quantity id="4C8A9B777A02FFCA4399F8F84028F895" box="[174,261,1823,1849]" metricMagnitude="-3" metricUnit="m" metricValue="3.6" pageId="1" pageNumber="370" unit="mm" value="3.6">3.6 mm</quantity>
) (
<collectionCode id="ED63AE577A02FFCA422CF8F84052F895" box="[283,383,1823,1849]" country="USA" httpUri="http://grbio.org/cool/24h4-51mc" name="Florida Museum of Natural History" pageId="1" pageNumber="370" type="Museum">FLMNH</collectionCode>
<specimenCode id="DBD49EE97A02FFCA42B2F8F840D7F895" box="[389,506,1823,1849]" collectionCode="UF" country="USA" lsid="urn:lsid:biocol.org:col:34858" name="Florida Museum of Natural History- Zoology, Paleontology and Paleobotany" pageId="1" pageNumber="370" type="Museum">UF 72877</specimenCode>
), same collection data as for the
<typeStatus id="54C988307A02FFCA4050F8F842E4F895" box="[871,969,1823,1849]" pageId="1" pageNumber="370" type="holotype">holotype</typeStatus>
[AA-22-509; terebellid host, AA-22-508, deposited in
<collectionCode id="ED63AE577A02FFCA4211F8A4405DF8F1" box="[294,368,1859,1885]" pageId="1" pageNumber="370">RSRC</collectionCode>
/
<collectionCode id="ED63AE577A02FFCA424EF8A440F7F8F1" box="[377,474,1859,1885]" pageId="1" pageNumber="370">KAUST</collectionCode>
]; 1 ovigerous female (5.9 ×
<quantity id="4C8A9B777A02FFCA4025F8A44244F8F1" box="[786,873,1859,1885]" metricMagnitude="-3" metricUnit="m" metricValue="3.4" pageId="1" pageNumber="370" unit="mm" value="3.4">3.4 mm</quantity>
) (
<collectionCode id="ED63AE577A02FFCA4048F8A442CEF8F1" box="[895,995,1859,1885]" country="USA" httpUri="http://grbio.org/cool/24h4-51mc" name="Florida Museum of Natural History" pageId="1" pageNumber="370" type="Museum">FLMNH</collectionCode>
<specimenCode id="DBD49EE97A02FFCA40DDF8A44572F8F1" box="[1002,1119,1859,1885]" collectionCode="UF" country="USA" lsid="urn:lsid:biocol.org:col:34858" name="Florida Museum of Natural History- Zoology, Paleontology and Paleobotany" pageId="1" pageNumber="370" type="Museum">UF 72878</specimenCode>
), same collection data as for the
<typeStatus id="54C988307A02FFCA43F7F880400FF82D" box="[192,290,1895,1921]" pageId="1" pageNumber="370" type="holotype">holotype</typeStatus>
[AA-22-510]
</materialsCitation>
.
</paragraph>
<caption id="DF0D661A7A01FFC943A0F89943A4F872" ID-DOI="http://doi.org/10.5281/zenodo.13618521" ID-Zenodo-Dep="13618521" httpUri="https://zenodo.org/record/13618521/files/figure.png" pageId="2" pageNumber="371" startId="2.[151,250,1918,1942]" targetBox="[151,1435,181,1894]" targetPageId="2" targetType="figure">
<paragraph id="8BCD36927A01FFC943A0F89943A4F872" blockId="2.[151,1437,1918,2015]" pageId="2" pageNumber="371">
<emphasis id="B906EA807A01FFC943A0F8994022F83A" bold="true" box="[151,271,1918,1942]" pageId="2" pageNumber="371">FIGURE 1</emphasis>
.
<taxonomicName id="4C724D117A01FFC94229F89840C3F83A" authorityName="Ng &amp; Anker" authorityYear="2024" box="[286,494,1918,1942]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="2" pageNumber="371" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A01FFC94229F89840C3F83A" box="[286,494,1918,1942]" italics="true" pageId="2" pageNumber="371">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A01FFC942C1F8994364F83A" bold="true" box="[502,585,1918,1942]" pageId="2" pageNumber="371">
<taxonomicNameLabel id="A23557FB7A01FFC942C1F8994364F83A" box="[502,585,1918,1942]" pageId="2" pageNumber="371" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, ovigerous female paratype (6.3 × 3.7 mm) from Thuwal, Saudi Arabia, FLMNH UF 72877, crab with terebellid polychaete host shortly after collection; A, general view of worm with crab; B, close-up of crab clinging to worm host. Photographs by A. Anker.
</paragraph>
</caption>
<paragraph id="8BCD36927A00FFC843F0FF71443BFF54" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
<emphasis id="B906EA807A00FFC843F0FF7140FFFF1C" bold="true" box="[199,466,150,176]" pageId="3" pageNumber="372">Comparative material</emphasis>
.
<taxonomicName id="4C724D117A00FFC842D5FF7042F2FF1C" authority="Ahyong &amp; Ng, 2009" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[482,991,150,177]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="372" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A00FFC842D5FF7043C5FF1C" box="[482,744,150,177]" italics="true" pageId="3" pageNumber="372">Gustavus mecognathus</emphasis>
<materialsCitation id="3B1A3CCF7A00FFC841D8FF7142F2FF1C" box="[751,991,150,177]" collectingDate="2000-03-20" collectionCode="ZRC" collectorName="G. Paulay" country="Northern Mariana Islands" location="Mariana Islands" pageId="3" pageNumber="372" specimenCode="ZRC 2010.0251, ZRC 2010.0252" specimenCount="2" typeStatus="holotype">
<bibRefCitation id="EFE34B637A00FFC841D8FF7142F2FF1C" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[751,991,150,177]" pageId="3" pageNumber="372" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong &amp; Ng, 2009</bibRefCitation>
</materialsCitation>
</taxonomicName>
.
<typeStatus id="54C988307A00FFC840DBFF714574FF1C" box="[1004,1113,150,176]" pageId="3" pageNumber="372" type="holotype">Holotype</typeStatus>
: male (8.8 ×
<quantity id="4C8A9B777A00FFC847C5FF714466FF1C" box="[1266,1355,150,176]" metricMagnitude="-3" metricUnit="m" metricValue="6.1" pageId="3" pageNumber="372" unit="mm" value="6.1">6.1 mm</quantity>
) (
<specimenCode id="DBD49EE97A00FFC84653FF71403EFF79" collectionCode="ZRC" country="Singapore" httpUri="http://grbio.org/cool/16z4-1tbx" name="Zoological Reference Collection, National University of Singapore" pageId="3" pageNumber="372">ZRC 2010.0251</specimenCode>
);
<typeStatus id="54C988307A00FFC8421EFF5C40A3FF79" box="[297,398,187,213]" pageId="3" pageNumber="372" type="paratype">paratype</typeStatus>
: ovigerous female (13.9 × 8.0 mm) (
<specimenCode id="DBD49EE97A00FFC8400EFF5D42DAFF79" box="[825,1015,186,213]" collectionCode="ZRC" country="Singapore" httpUri="http://grbio.org/cool/16z4-1tbx" name="Zoological Reference Collection, National University of Singapore" pageId="3" pageNumber="372">ZRC 2010.0252</specimenCode>
),
<collectingCountry id="F36576027A00FFC8473BFF5D45E9FF78" box="[1036,1220,186,212]" name="Northern Mariana Islands" pageId="3" pageNumber="372">Mariana Islands</collectingCountry>
,
<collectingCountry id="F36576027A00FFC847E5FF5D4434FF78" box="[1234,1305,186,212]" name="Guam" pageId="3" pageNumber="372">Guam</collectingCountry>
, Southwest Cocos Barrier, near small pass, with large terebellid polychaete worm, coll.
<collectorName id="268753447A00FFC840DEFF394575FF54" box="[1001,1112,222,248]" pageId="3" pageNumber="372">G. Paulay</collectorName>
,
<date id="FFCC10527A00FFC84753FF39443EFF54" box="[1124,1299,222,248]" pageId="3" pageNumber="372" value="2000-03-20">
<collectingDate id="EF88E9BA7A00FFC84753FF39443EFF54" box="[1124,1299,222,248]" pageId="3" pageNumber="372" value="2000-03-20">20 March 2000</collectingDate>
</date>
.
</paragraph>
</subSubSection>
<subSubSection id="C36865197A00FFC843F0FEE54474FE58" pageId="3" pageNumber="372" type="diagnosis">
<paragraph id="8BCD36927A00FFC843F0FEE54474FE58" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
<emphasis id="B906EA807A00FFC843F0FEE54017FEB0" bold="true" box="[199,314,258,284]" pageId="3" pageNumber="372">Diagnosis</emphasis>
. Carapace with metagastric region distinctly transversely depressed in both sexes (
<figureCitation id="13492A177A00FFC847D6FEE5444AFEB0" box="[1249,1383,258,284]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A, C</figureCitation>
,
<figureCitation id="13492A177A00FFC84644FEE54181FEEC" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="3" pageNumber="372">3A, C</figureCitation>
,
<figureCitation id="13492A177A00FFC8438EFEC141D2FEEC" box="[185,255,294,320]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A, B</figureCitation>
); male frontal width proportionately narrow, median lobes acutely triangular (
<figureCitation id="13492A177A00FFC84745FEC145E7FEEC" box="[1138,1226,294,320]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Fig. 4C</figureCitation>
,
<figureCitation id="13492A177A00FFC847E0FEC145D1FEED" box="[1239,1276,294,321]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5A</figureCitation>
); female front wider, median lobes low, separated by shallow concavity (
<figureCitation id="13492A177A00FFC84004FEAD42A3FEC8" box="[819,910,330,356]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Fig. 4D</figureCitation>
,
<figureCitation id="13492A177A00FFC840ACFEAD4293FEC9" box="[923,958,330,357]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5E</figureCitation>
). Mxp3 ischium with inner margin gently concave (
<figureCitation id="13492A177A00FFC84235FE894056FE24" box="[258,379,366,392]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6A, B</figureCitation>
).
<collectingRegion id="49B6F8707A00FFC842A7FE8940E7FE24" box="[400,458,366,392]" country="Maldives" name="Maale" pageId="3" pageNumber="372">Male</collectingRegion>
and female P4 and P5 basis-ischium with 2 or 3 spines on flexor margin (
<figureCitation id="13492A177A00FFC84636FE894182FE00" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6E, F, M, N</figureCitation>
); male and female P4 merus with 1 spine on flexor margin (
<figureCitation id="13492A177A00FFC8407DFE7542EAFE00" box="[842,967,402,428]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6E, M</figureCitation>
); male and female P5 merus with 2 spines on flexor margin (
<figureCitation id="13492A177A00FFC84253FE5140C8FE7C" box="[356,485,438,464]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Figs. 6F, N</figureCitation>
).
<collectingRegion id="49B6F8707A00FFC842CDFE514319FE7C" box="[506,564,438,464]" country="Maldives" name="Maale" pageId="3" pageNumber="372">Male</collectingRegion>
pleon with somites 4–6 immobile, with sutures visible between somites (
<figureCitation id="13492A177A00FFC84658FE514190FE58" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6G</figureCitation>
). G1 overall relatively stout, apex short, rounded, with sharp subdistal projection (
<figureCitation id="13492A177A00FFC84760FE3D45F9FE59" box="[1111,1236,474,501]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Figs. 4E, F</figureCitation>
,
<figureCitation id="13492A177A00FFC847E8FE3D4429FE59" box="[1247,1284,474,501]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5D</figureCitation>
,
<figureCitation id="13492A177A00FFC84638FE3D4467FE58" box="[1295,1354,474,500]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">6H, I</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C36865197A00FFC243F0FE19438DFB69" lastPageId="9" lastPageNumber="378" pageId="3" pageNumber="372" type="description">
<paragraph id="8BCD36927A00FFC843F0FE194465FC09" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
<emphasis id="B906EA807A00FFC843F0FE19407CFDB4" bold="true" box="[199,337,510,536]" pageId="3" pageNumber="372">Description</emphasis>
.
<emphasis id="B906EA807A00FFC84253FE194088FDB4" box="[356,421,510,536]" italics="true" pageId="3" pageNumber="372">
<collectingRegion id="49B6F8707A00FFC84253FE19408CFDB4" box="[356,417,510,536]" country="Maldives" name="Maale" pageId="3" pageNumber="372">Male</collectingRegion>
.
</emphasis>
Carapace subpentagonal, broader than long, width to length ratio 1.56; dorsal surface almost smooth, regions poorly demarcated, with numerous, small, shallow pits (
<figureCitation id="13492A177A00FFC84724FDC5455AFD90" box="[1043,1143,546,572]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A</figureCitation>
,
<figureCitation id="13492A177A00FFC847B5FDC54585FD90" box="[1154,1192,546,572]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A</figureCitation>
); surface and margins finely pubescent; short, dense setae present on front, partially obscuring margin; metagastric region transversely depressed, covered with low, soft, easily detachable setae (
<figureCitation id="13492A177A00FFC84077FD8D42E6FD28" box="[832,971,618,644]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A, C</figureCitation>
,
<figureCitation id="13492A177A00FFC840EEFD8D452DFD28" box="[985,1024,618,644]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A</figureCitation>
); anterolateral margin entire, gently convex laterally, subcristate, continuing onto posterolateral margin but not supraorbital margin (
<figureCitation id="13492A177A00FFC847C4FD694477FD04" box="[1267,1370,654,680]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A</figureCitation>
,
<figureCitation id="13492A177A00FFC8465DFD6944BDFD04" box="[1386,1424,654,680]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A</figureCitation>
). Front deflexed, medially emarginate in dorsal view; median lobes triangular, separated by distinct cleft, triangular in anterior view; lateral tooth distinct in dorsal view (
<figureCitation id="13492A177A00FFC841FAFD31421DFD5C" box="[717,816,726,752]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Figs. 4C</figureCitation>
,
<figureCitation id="13492A177A00FFC8400CFD31424CFD5D" box="[827,865,726,753]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5A</figureCitation>
). Orbital margin entire, slightly narrowed laterally; infraorbital margin terminating mesially as rounded angle; supraorbital margin terminating mesially as small triangular, ventrally directed tooth (
<figureCitation id="13492A177A00FFC84113FCF943ABFC94" box="[548,646,798,824]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Figs. 4C</figureCitation>
,
<figureCitation id="13492A177A00FFC841A6FCF9439AFC95" box="[657,695,798,825]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5A</figureCitation>
). Epistome very short, partially sunken medially; posterior margin gently concave, entire (
<figureCitation id="13492A177A00FFC84294FCA5432DFCF1" box="[419,512,834,861]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5A</figureCitation>
). Eyes mobile, filling orbit; cornea simple, pigmented (
<figureCitation id="13492A177A00FFC8474AFCA545FBFCF0" box="[1149,1238,834,860]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Fig. 4C</figureCitation>
,
<figureCitation id="13492A177A00FFC847D3FCA54427FCF1" box="[1252,1290,834,861]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">5A</figureCitation>
). Antennular fossae large; antennule folding obliquely, filling fossa (
<figureCitation id="13492A177A00FFC84020FC814259FC2D" box="[791,884,870,897]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5A</figureCitation>
). Antenna short, fully entering orbit, with basal antennal article stout, quadrate, not fused to carapace, not reaching distolateral angle of carapace (
<figureCitation id="13492A177A00FFC847D6FC6D4416FC09" box="[1249,1339,906,933]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5A</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A00FFC843F0FC494327FBF4" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
Mxp3 covering most of buccal cavern when closed; ischium distinctly longer than merus, slender, subtriangular, distomesial angle produced into rounded lobe extending mesially beyond level of mesial meral margin, inner margin gently concave; merus smaller than ischium, slightly wider than long; palp articulating on distal margin of merus; basal part of exopod relatively slender, reaching almost to just above merus; exopod flagellum short, not reaching distal margin of merus (
<figureCitation id="13492A177A00FFC84294FBD940D0FBF4" box="[419,509,1086,1112]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6A</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A00FFC843F0FB854075FAF9" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
Chelipeds equal, covered with short, fine setae partially obscuring margins and surface (
<figureCitation id="13492A177A00FFC847E6FB854477FBD0" box="[1233,1370,1122,1148]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A–C</figureCitation>
,
<figureCitation id="13492A177A00FFC8465EFB8544A2FBD0" box="[1385,1423,1122,1148]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A</figureCitation>
); merus triangular in cross-section, with plumose setae proximally; carpus smooth, inner angle rounded, with sparser plumose setae; chela surfaces relatively short, surface smooth, except for scattered, low, rounded granules and punctae on lower portion of palm; palm longer than dactylus, ventral margin near pollex concave; pollex with convex occlusal margin, with blunt teeth proximally, distal half with small teeth fused basally, forming blade-like structure; dactylus with occlusal margin armed with 3 low, blunt teeth proximally, distal part unarmed, tip strongly curved (
<figureCitation id="13492A177A00FFC843C4FADD4066FAF9" box="[243,331,1338,1365]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5B</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A00FFC843F0FAB945E9F9FC" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
P2–P5 relatively short, P3 longest, P5 shortest; P5 dorsal to other pereopods (
<figureCitation id="13492A177A00FFC84723FAB9455BFAD4" box="[1044,1142,1374,1400]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="3" pageNumber="372">Figs. 2A</figureCitation>
,
<figureCitation id="13492A177A00FFC847B7FAB9458BFAD4" box="[1152,1190,1374,1400]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">4A</figureCitation>
); propodus and carpus covered with short, fine tomentum partially obscuring surface and margins; merus with plumose setae along flexor and extensor margins; P2 and P3 merus longer than carpus and propodus combined; P4 and P5 merus subequal to carpus and propodus combined; dactylus short, stout, unarmed laterally, with corneous apex (
<figureCitation id="13492A177A00FFC847F7FA2D4414FA48" box="[1216,1337,1482,1508]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6C–F</figureCitation>
). P2 and P3 merus with margins almost entire (
<figureCitation id="13492A177A00FFC84178FA0943E2F9A4" box="[591,719,1518,1544]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6C, D</figureCitation>
). P4 and P5 ischium each armed with 2 stout spines on flexor margin; P4 merus with 1 larger spine on flexor margin; P5 merus with 2 spines on flexor margin (
<figureCitation id="13492A177A00FFC847FAF9F5446DF980" box="[1229,1344,1554,1580]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6E, F</figureCitation>
). P2–P5 propodus with 2 or 3 small, fixed spines on distal flexor margin opposing dactylus (
<figureCitation id="13492A177A00FFC84777F9D1459AF9FC" box="[1088,1207,1590,1616]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6C–F</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A00FFC843F0F9BD4302F8A8" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
Thoracic sternum relatively wide; sternites 1–3 completely fused, sternites 1 and 2 demarcated only by row of setae; sternites 3 and 4 partially fused, separated by shallow median groove lined with setae; sternopleonal cavity wide, deep, its distal part subcristate, tip reaching to imaginary line joining subproximal edge of cheliped coxae; proximal third of sternite 5 with rounded tubercle representing pleonal locking mechanism (
<figureCitation id="13492A177A00FFC8479FF9214408F94C" box="[1192,1317,1734,1761]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5C, D</figureCitation>
). Thoracic sternite 8 visible when pleon closed.
</paragraph>
<paragraph id="8BCD36927A00FFC843F0F8E94475F8E0" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
Pleon broadly triangular; somites 4–6 with sutures visible but functionally fused, immobile; somites 1–3 subequal in width; somites 4 and 5 trapezoidal; somite 6 subrectangular; telson wide, semicircular (
<figureCitation id="13492A177A00FFC847C6F8D54466F8E0" box="[1265,1355,1842,1868]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">Fig. 6G</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A00FFC843F0F8B142E4F870" blockId="3.[151,1437,150,2013]" pageId="3" pageNumber="372">
G1 relatively stout, with tip directed mesially (
<figureCitation id="13492A177A00FFC841FFF8B1420CF8DD" box="[712,801,1878,1905]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="3" pageNumber="372">Fig. 5D</figureCitation>
); distal quarter distinctly bent at about 45° to longitudinal axis; distally tapering gradually to short, rounded apex, with numerous stiff setae; with short, sharp subdistal projection on lower margin; groove for G2 present on mesioventral surface (
<figureCitation id="13492A177A00FFC840D2F8794572F815" box="[997,1119,1950,1977]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Figs. 4E, F</figureCitation>
,
<figureCitation id="13492A177A00FFC8475DF8794589F814" box="[1130,1188,1950,1976]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">6H, I</figureCitation>
). G2 short, about onethird length of G1; distally spatulate, apex bluntly angular (
<figureCitation id="13492A177A00FFC84007F82542B9F870" box="[816,916,1986,2012]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="3" pageNumber="372">Figs. 4G</figureCitation>
,
<figureCitation id="13492A177A00FFC840A8F8254291F870" box="[927,956,1986,2012]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="3" pageNumber="372">6J</figureCitation>
).
</paragraph>
<caption id="DF0D661A7A07FFCF43A0F87045B8F878" ID-DOI="http://doi.org/10.5281/zenodo.13618523" ID-Zenodo-Dep="13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="4" pageNumber="373" startId="4.[151,250,1943,1967]" targetBox="[193,1394,181,1919]" targetPageId="4" targetType="figure">
<paragraph id="8BCD36927A07FFCF43A0F87045B8F878" blockId="4.[151,1436,1943,2004]" pageId="4" pageNumber="373">
<emphasis id="B906EA807A07FFCF43A0F870403DF803" bold="true" box="[151,272,1943,1967]" pageId="4" pageNumber="373">FIGURE 2</emphasis>
.
<taxonomicName id="4C724D117A07FFCF4229F87F40DDF81C" authorityName="Ng &amp; Anker" authorityYear="2024" box="[286,496,1944,1968]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="4" pageNumber="373" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A07FFCF4229F87F40DDF81C" box="[286,496,1944,1968]" italics="true" pageId="4" pageNumber="373">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A07FFCF42CFF87F437FF81C" bold="true" box="[504,594,1944,1968]" pageId="4" pageNumber="373">
<taxonomicNameLabel id="A23557FB7A07FFCF42CFF87F4360F81C" box="[504,589,1944,1968]" pageId="4" pageNumber="373" rank="species">sp. nov.</taxonomicNameLabel>
,
</emphasis>
male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker.
</paragraph>
</caption>
<caption id="DF0D661A7A06FFCE43A0F8BD45B8F83A" ID-DOI="http://doi.org/10.5281/zenodo.13618525" ID-Zenodo-Dep="13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="5" pageNumber="374" startId="5.[151,250,1882,1906]" targetBox="[151,1436,181,1858]" targetPageId="5" targetType="figure">
<paragraph id="8BCD36927A06FFCE43A0F8BD45B8F83A" blockId="5.[151,1437,1882,1943]" pageId="5" pageNumber="374">
<emphasis id="B906EA807A06FFCE43A0F8BD4026F8DE" bold="true" box="[151,267,1882,1906]" pageId="5" pageNumber="374">FIGURE 3</emphasis>
.
<taxonomicName id="4C724D117A06FFCE4222F8BC40CFF8DE" authorityName="Ng &amp; Anker" authorityYear="2024" box="[277,482,1882,1906]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="374" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A06FFCE4222F8BC40CFF8DE" box="[277,482,1882,1906]" italics="true" pageId="5" pageNumber="374">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A06FFCE42D2F8BC4319F8DF" bold="true" box="[485,564,1883,1907]" pageId="5" pageNumber="374">
<taxonomicNameLabel id="A23557FB7A06FFCE42D2F8BC4319F8DF" box="[485,564,1883,1907]" pageId="5" pageNumber="374" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, ovigerous female paratype (7.3 × 4.0 mm) from Thuwal Saudi Arabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker.
</paragraph>
</caption>
<caption id="DF0D661A7A05FFCD43A0F8DC440FF830" ID-DOI="http://doi.org/10.5281/zenodo.13618527" ID-Zenodo-Dep="13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="6" pageNumber="375" startId="6.[151,250,1851,1875]" targetBox="[151,1435,181,1828]" targetPageId="6" targetType="figure">
<paragraph id="8BCD36927A05FFCD43A0F8DC440FF830" blockId="6.[151,1436,1851,1948]" pageId="6" pageNumber="375">
<emphasis id="B906EA807A05FFCD43A0F8DC4021F8F8" bold="true" box="[151,268,1851,1876]" pageId="6" pageNumber="375">FIGURE 4</emphasis>
.
<taxonomicName id="4C724D117A05FFCD422FF8DB40CBF8F8" authorityName="Ng &amp; Anker" authorityYear="2024" box="[280,486,1852,1876]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="375" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A05FFCD422FF8DB40CBF8F8" box="[280,486,1852,1876]" italics="true" pageId="6" pageNumber="375">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A05FFCD42DCF8DB4317F8F8" bold="true" box="[491,570,1852,1876]" pageId="6" pageNumber="375">
<taxonomicNameLabel id="A23557FB7A05FFCD42DCF8DB4317F8F8" box="[491,570,1852,1876]" pageId="6" pageNumber="375" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view.
</paragraph>
</caption>
<caption id="DF0D661A7A04FFCC43A0F9F742EFF970" ID-DOI="http://doi.org/10.5281/zenodo.13618529" ID-Zenodo-Dep="13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="7" pageNumber="376" startId="7.[151,250,1552,1576]" targetBox="[151,1435,181,1528]" targetPageId="7" targetType="figure">
<paragraph id="8BCD36927A04FFCC43A0F9F742EFF970" blockId="7.[151,1436,1552,1756]" pageId="7" pageNumber="376">
<emphasis id="B906EA807A04FFCC43A0F9F7403DF984" bold="true" box="[151,272,1552,1576]" pageId="7" pageNumber="376">FIGURE 5</emphasis>
.
<taxonomicName id="4C724D117A04FFCC4228F9F640DCF984" authorityName="Ng &amp; Anker" authorityYear="2024" box="[287,497,1552,1576]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="7" pageNumber="376" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A04FFCC4228F9F640DCF984" box="[287,497,1552,1576]" italics="true" pageId="7" pageNumber="376">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A04FFCC42CDF9F74360F984" bold="true" box="[506,589,1552,1576]" pageId="7" pageNumber="376">
<taxonomicNameLabel id="A23557FB7A04FFCC42CDF9F74360F984" box="[506,589,1552,1576]" pageId="7" pageNumber="376" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view.
</paragraph>
</caption>
<paragraph id="8BCD36927A04FFC343F0F8ED4394FE01" blockId="7.[151,1436,1802,2008]" lastBlockId="8.[151,1437,150,429]" lastPageId="8" lastPageNumber="377" pageId="7" pageNumber="376">
<emphasis id="B906EA807A04FFCC43F0F8ED4036F888" box="[199,283,1802,1828]" italics="true" pageId="7" pageNumber="376">Female</emphasis>
. Carapace transversely ovate, much broader than long, width to length ratio 1.74–1.83; dorsal surface almost smooth, with numerous small shallow pits, regions poorly demarcated (
<figureCitation id="13492A177A04FFCC471BF8C94599F8E5" box="[1068,1204,1838,1865]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="7" pageNumber="376">Figs. 3A–C</figureCitation>
,
<figureCitation id="13492A177A04FFCC47F4F8C845CAF8E5" box="[1219,1255,1839,1865]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="7" pageNumber="376">4B</figureCitation>
); surface finely pubescent on surface and margins; front with short, dense setae partially obscuring margin; lower lateral margins with longer, dense, plumose setae obscuring surface; metagastric region transversely depressed, covered with low, soft setae, latter easily brushed off (
<figureCitation id="13492A177A04FFCC4106F87D4394F819" box="[561,697,1946,1973]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="7" pageNumber="376">Figs. 3A, C</figureCitation>
,
<figureCitation id="13492A177A04FFCC41F0F87C43C6F819" box="[711,747,1947,1973]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="7" pageNumber="376">4B</figureCitation>
). Front deflexed, medially gently emarginate in dorsal view, separated by shallow concavity, triangular in anterior view; lateral tooth low but distinct, rounded in dorsal view (
<figureCitation id="13492A177A0BFFC343A8FF704028FF1D" box="[159,261,151,177]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="8" pageNumber="377">Figs. 4D</figureCitation>
,
<figureCitation id="13492A177A0BFFC34225FF714019FF1D" box="[274,308,150,177]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">5E</figureCitation>
). Orbital margin entire, gently concave, slightly narrowed laterally; infraorbital margin terminating mesially as rounded angle; supraorbital margin terminating mesially as low, slender, ventrally directed tooth (
<figureCitation id="13492A177A0BFFC34653FF5C4191FF55" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="8" pageNumber="377">Figs. 4D</figureCitation>
,
<figureCitation id="13492A177A0BFFC343FDFF3941C1FF55" box="[202,236,222,249]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">5E</figureCitation>
). Anterolateral margin entire, convex laterally, subcristate, continuing onto posterolateral margin but not supraorbital margin, with very shallow, short, transverse groove along proximal third (
<figureCitation id="13492A177A0BFFC347B6FEE445C5FEB1" box="[1153,1256,259,285]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="8" pageNumber="377">Figs. 3A</figureCitation>
,
<figureCitation id="13492A177A0BFFC347C0FEE44436FEB1" box="[1271,1307,259,285]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="8" pageNumber="377">4B</figureCitation>
). Epistome very short, partly sunken medially; posterior margin gently concave, entire (
<figureCitation id="13492A177A0BFFC34733FEC04570FEED" box="[1028,1117,294,321]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">Fig. 5E</figureCitation>
). Eyes mobile, filling orbit; cornea simple, pigmented (
<figureCitation id="13492A177A0BFFC342FBFEAC431CFEC9" box="[460,561,331,357]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="8" pageNumber="377">Figs. 4D</figureCitation>
,
<figureCitation id="13492A177A0BFFC34109FEAD434DFEC9" box="[574,608,330,357]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">5E</figureCitation>
). Antennular fossae large; antennule folding obliquely, filling fossa (
<figureCitation id="13492A177A0BFFC34658FEAC4194FE25" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">Fig. 5E</figureCitation>
). Antenna short, completely entering orbit, with basal antennal article stout, quadrate, not fused to carapace, not reaching distolateral angle of carapace (
<figureCitation id="13492A177A0BFFC34162FE744381FE01" box="[597,684,402,429]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="8" pageNumber="377">Fig. 5E</figureCitation>
).
</paragraph>
<caption id="DF0D661A7A0BFFC343A0F8FA437DF869" ID-DOI="http://doi.org/10.5281/zenodo.13618533" ID-Zenodo-Dep="13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="8" pageNumber="377" startId="8.[151,250,1821,1845]" targetBox="[158,1429,460,1791]" targetPageId="8" targetType="figure">
<paragraph id="8BCD36927A0BFFC343A0F8FA437DF869" blockId="8.[151,1437,1821,1989]" pageId="8" pageNumber="377">
<emphasis id="B906EA807A0BFFC343A0F8FA403DF899" bold="true" box="[151,272,1821,1845]" pageId="8" pageNumber="377">FIGURE 6</emphasis>
.
<taxonomicName id="4C724D117A0BFFC34228F8FA40DCF899" authorityName="Ng &amp; Anker" authorityYear="2024" box="[287,497,1821,1845]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="8" pageNumber="377" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A0BFFC34228F8FA40DCF899" box="[287,497,1821,1845]" italics="true" pageId="8" pageNumber="377">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A0BFFC342CDF8FA4360F899" bold="true" box="[506,589,1821,1845]" pageId="8" pageNumber="377">
<taxonomicNameLabel id="A23557FB7A0BFFC342CDF8FA4360F899" box="[506,589,1821,1845]" pageId="8" pageNumber="377" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm.
</paragraph>
</caption>
<paragraph id="8BCD36927A0AFFC243F0FF70435DFEED" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
Mxp3 covering most of buccal cavern when closed; ischium distinctly longer than merus, slender, subtriangular, distomesial angle produced into rounded lobe extending mesially beyond level of mesial meral margin, mesial margin gently concave; merus smaller than ischium, slightly wider than long, squircular; palp articulating on distal margin of merus; basal part of exopod slender, tip reaching almost to just above merus; exopod flagellum short, not reaching distal margin of merus (
<figureCitation id="13492A177A0AFFC2413DFEC0434EFEED" box="[522,611,295,321]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6B</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A0AFFC243F0FEAC4078FD91" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
Chelipeds equal, densely covered with fine, short, setae partially obscuring margins and surface (
<figureCitation id="13492A177A0AFFC24605FEAC44BAFEC9" box="[1330,1431,331,357]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="9" pageNumber="378">Figs. 4B</figureCitation>
,
<figureCitation id="13492A177A0AFFC243A0FE894195FE25" box="[151,184,366,393]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">5F</figureCitation>
); merus triangular in cross-section, with plumose setae proximally; carpus smooth, inner angle rounded, with sparse plumose setae; chela somewhat elongate, surfaces smooth except for scattered, low, rounded granules on lower portion of palm; palm distinctly longer than dactylus, with ventral margin near pollex concave; pollex with occlusal margin convex, with blunt teeth proximally, distal two-thirds with small teeth fused basally, forming blade-like structure; dactylus with occlusal margin armed with 2 or 3 low, blunt teeth proximally, distal part unarmed, tip curved (
<figureCitation id="13492A177A0AFFC243C4FDC44065FD91" box="[243,328,546,573]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5F</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A0AFFC243F0FDA141C1FC2D" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
P2–P5 relatively short, P3 longest, P5 shortest, dorsal to other pereopods (
<figureCitation id="13492A177A0AFFC240C3FDA0455AFDCD" box="[1012,1143,583,609]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="9" pageNumber="378">Figs. 3A–C</figureCitation>
,
<figureCitation id="13492A177A0AFFC247B6FDA04588FDCD" box="[1153,1189,583,609]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="9" pageNumber="378">4B</figureCitation>
); propodus and carpus covered with short, fine tomentum partially obscuring surface and margins; merus with plumose setae along flexor and extensor margins; P2 and P3 merus longer than carpus and propodus combined; P4 and P5 merus subequal to carpus and propodus combined; dactylus short, stout, unarmed laterally, with corneous apex (
<figureCitation id="13492A177A0AFFC2478CFD544417FD61" box="[1211,1338,691,717]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6K–N</figureCitation>
). P2 and P3 merus with flexor margin almost smooth except for scattered, very low, sharp granules (
<figureCitation id="13492A177A0AFFC247ACFD30443BFD5D" box="[1179,1302,727,753]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6K, L</figureCitation>
). P4 and P5 basis-ischium with 3 sharp, stout, fixed spines on flexor margin (
<figureCitation id="13492A177A0AFFC2404CFD1C42D2FCB9" box="[891,1023,763,789]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6M, N</figureCitation>
); P4 merus with 1 large, fixed spine on proximal third of flexor margin (
<figureCitation id="13492A177A0AFFC2411AFCF843A1FC95" box="[557,652,799,825]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6M</figureCitation>
); P5 with 2 large spines and 1 sharp, basal tubercle on proximal third of flexor margin (
<figureCitation id="13492A177A0AFFC24253FCA440EDFCF1" box="[356,448,835,861]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6N</figureCitation>
). P2–P5 propodus with 2 or 3 small, sharp, distoflexor spines opposing dactylus (
<figureCitation id="13492A177A0AFFC24658FCA441CDFC2D" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6K–N</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A0AFFC243F0FC6C4442FC09" blockId="9.[151,1437,151,2013]" box="[199,1391,906,933]" pageId="9" pageNumber="378">
Thoracic sternum similar in form to that of male in non-sexual characters, but distinctly broader (
<figureCitation id="13492A177A0AFFC2463FFC6C444EFC09" box="[1288,1379,906,933]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5H</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A0AFFC243F0FC4840ABFBBD" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
Pleon wide, ovate, all somites and telson free; somites 3 and 4 widest; telson wide, with strongly convex margins (
<figureCitation id="13492A177A0AFFC243C8FC34404CFC41" box="[255,353,979,1005]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="9" pageNumber="378">Figs. 3B</figureCitation>
,
<figureCitation id="13492A177A0AFFC2425CFC3540BFFC41" box="[363,402,978,1005]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">5G</figureCitation>
). Vulvae positioned wide on sternite 6; vulvar cover tube-like, operculum soft, covering most of opening (
<figureCitation id="13492A177A0AFFC24228FC104054FBBD" box="[287,377,1014,1041]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5H</figureCitation>
).
</paragraph>
<paragraph id="8BCD36927A0AFFC243F0FBFD438DFB69" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
<emphasis id="B906EA807A0AFFC243F0FBFD4015FB98" bold="true" box="[199,312,1050,1076]" pageId="9" pageNumber="378">Variation</emphasis>
. There is a pronounced sexual dimorphism in
<taxonomicName id="4C724D117A0AFFC2405FFBFC457CFB99" authorityName="Ng &amp; Anker" authorityYear="2024" box="[872,1105,1051,1077]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A0AFFC2405FFBFC457CFB99" box="[872,1105,1051,1077]" italics="true" pageId="9" pageNumber="378">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A0AFFC2476AFBFC4596FB99" bold="true" box="[1117,1211,1051,1077]" pageId="9" pageNumber="378">
<taxonomicNameLabel id="A23557FB7A0AFFC2476AFBFC4596FB99" box="[1117,1211,1051,1077]" pageId="9" pageNumber="378" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, with the carapace distinctly different in shape and proportions (cf.
<figureCitation id="13492A177A0AFFC2418EFBD84231FBF5" box="[697,796,1087,1113]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="9" pageNumber="378">Figs. 2A</figureCitation>
,
<figureCitation id="13492A177A0AFFC2401FFBD84260FBF5" box="[808,845,1087,1113]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="9" pageNumber="378">3A</figureCitation>
,
<figureCitation id="13492A177A0AFFC2406EFBD842B2FBF5" box="[857,927,1087,1113]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="9" pageNumber="378">4A, B</figureCitation>
). The largest
<typeStatus id="54C988307A0AFFC2470EFBD845B4FBF5" box="[1081,1177,1087,1113]" pageId="9" pageNumber="378" type="paratype">paratype</typeStatus>
female (7.3 × 4.0 mm, ZRC 2023.0580) is noticeably proportionally wider than the other
<specimenCount id="9D74FD1B7A0AFFC240B9FB844537FBD1" box="[910,1050,1123,1149]" count="2" pageId="9" pageNumber="378" type="female">two females</specimenCount>
, its carapace width to length ratio being 1.83 versus 1.74 and 1.75. The female chelae are proportionally longer than those of the male, with the fingers more elongate and less curved (cf.
<figureCitation id="13492A177A0AFFC24129FB4C43BEFB69" box="[542,659,1194,1221]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5B, F</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C36865197A0AFFC243F0FB2842F5FA9D" pageId="9" pageNumber="378" type="etymology">
<paragraph id="8BCD36927A0AFFC243F0FB2842F5FA9D" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
<emphasis id="B906EA807A0AFFC243F0FB284065FB45" bold="true" box="[199,328,1231,1257]" pageId="9" pageNumber="378">Etymology</emphasis>
. The authors take a great pleasure in naming the species after our friend, the marine biologist Bernadette Holthuis (University of
<collectingRegion id="49B6F8707A0AFFC2411CFB14439DFAA1" box="[555,688,1267,1293]" country="United States of America" name="Washington" pageId="9" pageNumber="378">Washington</collectingRegion>
Friday Harbor Laboratories), who is also a relative of one of the greatest carcinologists of the 20
<superScript id="7C079BDA7A0AFFC242CCFAF14325FA88" attach="left" box="[507,520,1302,1316]" fontSize="6" pageId="9" pageNumber="378">th</superScript>
century, Lipke B. Holthuis (1921–2008).
</paragraph>
</subSubSection>
<subSubSection id="C36865197A0AFFC243F0FADD4555FA49" pageId="9" pageNumber="378" type="biology_ecology">
<paragraph id="8BCD36927A0AFFC243F0FADD4555FA49" blockId="9.[151,1437,151,2013]" pageId="9" pageNumber="378">
<emphasis id="B906EA807A0AFFC243F0FADD400CFAF8" bold="true" box="[199,289,1338,1364]" pageId="9" pageNumber="378">Biology</emphasis>
. All specimens of
<taxonomicName id="4C724D117A0AFFC242D8FADC43FEFAF9" authorityName="Ng &amp; Anker" authorityYear="2024" box="[495,723,1339,1365]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A0AFFC242D8FADC43FEFAF9" box="[495,723,1339,1365]" italics="true" pageId="9" pageNumber="378">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A0AFFC241EEFADC421FFAF9" bold="true" box="[729,818,1339,1365]" pageId="9" pageNumber="378">
<taxonomicNameLabel id="A23557FB7A0AFFC241EEFADC421FFAF9" box="[729,818,1339,1365]" pageId="9" pageNumber="378" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
were collected near mangrove roots (dominant species:
<taxonomicName id="4C724D117A0AFFC243A0FAB840F0FAD5" authority="(Forskal))" baseAuthorityName="Forskal" box="[151,477,1374,1401]" class="Magnoliopsida" family="Acanthaceae" genus="Avicennia" kingdom="Plantae" order="Lamiales" pageId="9" pageNumber="378" phylum="Tracheophyta" rank="species" species="marina">
<emphasis id="B906EA807A0AFFC243A0FAB8404CFAD4" box="[151,353,1375,1401]" italics="true" pageId="9" pageNumber="378">Avicennia marina</emphasis>
(Forskål))
</taxonomicName>
, in water less than
<quantity id="4C8A9B777A0AFFC241F5FAB94228FAD5" box="[706,773,1374,1401]" metricMagnitude="-1" metricUnit="m" metricValue="5.0" pageId="9" pageNumber="378" unit="m" value="0.5">0.5 m</quantity>
deep; they were found in tubes of unidentified terebellid worms (
<figureCitation id="13492A177A0AFFC243C1FA644017FA31" box="[246,314,1411,1437]" captionStart="FIGURE 1" captionStartId="2.[151,250,1918,1942]" captionTargetBox="[151,1435,181,1894]" captionTargetId="figure-17@2.[151,1435,181,1894]" captionTargetPageId="2" captionText="FIGURE 1. Gustavus holthuisae sp. nov., ovigerous female paratype (6.3 × 3.7 mm) from Thuwal, Saudi Arabia, FLMNH UF 72877, crab with terebellid polychaete host shortly after collection; A, general view of worm with crab; B, close-up of crab clinging to worm host. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618521" httpUri="https://zenodo.org/record/13618521/files/figure.png" pageId="9" pageNumber="378">Fig. 1</figureCitation>
), which were extracted from fine sand/mud with the aid of a metallic suction pump. Although a complete specimen of the terebellid host was collected and deposited in KAUST, its identification to genus level was impossible based on examination of photographs alone (P. Hutchings, pers. comm.).
</paragraph>
</subSubSection>
<subSubSection id="C36865197A0AFFC143F0FA084013FEED" lastPageId="10" lastPageNumber="379" pageId="9" pageNumber="378" type="discussion">
<paragraph id="8BCD36927A0AFFC143F0FA084013FEED" blockId="9.[151,1437,151,2013]" lastBlockId="10.[151,1437,151,321]" lastPageId="10" lastPageNumber="379" pageId="9" pageNumber="378">
<emphasis id="B906EA807A0AFFC243F0FA084019F9A5" bold="true" box="[199,308,1519,1545]" pageId="9" pageNumber="378">Remarks</emphasis>
.
<taxonomicName id="4C724D117A0AFFC24276FA084309F9A5" authorityName="Ng &amp; Anker" authorityYear="2024" box="[321,548,1519,1545]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="holthuisae" status="sp. nov.">
<emphasis id="B906EA807A0AFFC24276FA084309F9A5" box="[321,548,1519,1545]" italics="true" pageId="9" pageNumber="378">Gustavus holthuisae</emphasis>
</taxonomicName>
<emphasis id="B906EA807A0AFFC2411EFA0843ACF9A5" bold="true" box="[553,641,1519,1545]" pageId="9" pageNumber="378">
<taxonomicNameLabel id="A23557FB7A0AFFC2411EFA0843ACF9A5" box="[553,641,1519,1545]" pageId="9" pageNumber="378" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
can easily be separated from
<taxonomicName id="4C724D117A0AFFC240F1FA084557F9A5" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[966,1146,1519,1545]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC240F1FA084557F9A5" box="[966,1146,1519,1545]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
by the following features: the metagastric region of the carapace is transversely distinctly depressed in both sexes (
<figureCitation id="13492A177A0AFFC24746F9F445D8F981" box="[1137,1269,1555,1581]" captionStart="FIGURE 2" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[193,1394,181,1919]" captionTargetId="figure-17@4.[193,1394,181,1919]" captionTargetPageId="4" captionText="FIGURE 2. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618523" httpUri="https://zenodo.org/record/13618523/files/figure.png" pageId="9" pageNumber="378">Figs. 2A, C</figureCitation>
,
<figureCitation id="13492A177A0AFFC24637F9F44468F981" box="[1280,1349,1555,1581]" captionStart="FIGURE 3" captionStartId="5.[151,250,1882,1906]" captionTargetBox="[151,1436,181,1858]" captionTargetId="figure-17@5.[151,1436,181,1858]" captionTargetPageId="5" captionText="FIGURE 3. Gustavus holthuisaesp. nov., ovigerous female paratype (7.3 × 4.0 mm) from Thuwal SaudiArabia, ZRC 2023.0580, habitus and colour in life; A, dorsal view; B, ventral view; C, frontal view. Photographs by A. Anker." figureDoi="http://doi.org/10.5281/zenodo.13618525" httpUri="https://zenodo.org/record/13618525/files/figure.png" pageId="9" pageNumber="378">3A, C</figureCitation>
,
<figureCitation id="13492A177A0AFFC24667F9F444BEF981" box="[1360,1427,1555,1581]" captionStart="FIGURE 4" captionStartId="6.[151,250,1851,1875]" captionTargetBox="[151,1435,181,1828]" captionTargetId="figure-17@6.[151,1435,181,1828]" captionTargetPageId="6" captionText="FIGURE 4. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C, E–G]; ovigerous female paratype (6.3 × 3.7 mm), FLMNH UF 72877, from type locality [B, D]; A, B, habitus in dorsal view; C, D, frontal margin and orbits, dorsal view; E, left G1, ventral view; F, left G1, dorsal view; G, left G2, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618527" httpUri="https://zenodo.org/record/13618527/files/figure.png" pageId="9" pageNumber="378">4A, B</figureCitation>
) (versus the entire dorsal carapace surface being gently convex, including the metagastric region, in
<taxonomicName id="4C724D117A0AFFC247D7F9D044B8F9FD" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1248,1429,1591,1617]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC247D7F9D044B8F9FD" box="[1248,1429,1591,1617]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC243CBF9BC40B5F9D9" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[252,408,1627,1653]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: figs. 4A, 5A, 7A); the male frontal margin is proportionally narrower, with the median lobes acutely triangular (
<figureCitation id="13492A177A0AFFC2425BF99840EEF935" box="[364,451,1662,1689]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5C</figureCitation>
) (versus broader and with the median lobes lower and more obtuse in
<taxonomicName id="4C724D117A0AFFC247E9F99844B8F935" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1246,1429,1663,1689]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC247E9F99844B8F935" box="[1246,1429,1663,1689]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC243EDF944405BF911" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[218,374,1699,1725]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: fig. 4A); the female frontal margin has the median lobes separated by a shallow concavity (
<figureCitation id="13492A177A0AFFC24658F9444197F94D" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="9" pageNumber="378">Fig. 5D</figureCitation>
) (versus separated by a distinct V-shaped notch in
<taxonomicName id="4C724D117A0AFFC241C3F9204287F94D" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[756,938,1735,1761]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC241C3F9204287F94D" box="[756,938,1735,1761]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC24716F9204593F94D" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[1057,1214,1735,1761]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: fig. 5A); the Mxp3 ischium has a gently concave inner margin (
<figureCitation id="13492A177A0AFFC2414BF90C43DCF8A9" box="[636,753,1771,1797]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6A, B</figureCitation>
) (versus with a distinctly concave margin in
<taxonomicName id="4C724D117A0AFFC247D7F90C44B8F8A9" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1248,1429,1771,1797]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC247D7F90C44B8F8A9" box="[1248,1429,1771,1797]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC24236F8E840B2F885" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[257,415,1807,1833]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: figs. 4C, 5C); the basis-ischium of the male and female P4 and P5 has two or three spines on the flexor margin (
<figureCitation id="13492A177A0AFFC242BBF8D4436BF8E1" box="[396,582,1843,1869]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6E, F, M, N</figureCitation>
) (versus a cluster of three or four small and large spines in
<taxonomicName id="4C724D117A0AFFC247E9F8D444B8F8E1" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1246,1429,1843,1869]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC247E9F8D444B8F8E1" box="[1246,1429,1843,1869]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC24231F8B0408BF8DD" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[262,422,1879,1905]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: figs. 4G, H, 5G, H); the merus of the male and female P5 has two spines on the flexor margin (
<figureCitation id="13492A177A0AFFC243C2F89C4044F839" box="[245,361,1915,1941]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6F, N</figureCitation>
) (versus only one spine in
<taxonomicName id="4C724D117A0AFFC241A0F89C4263F839" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[663,846,1915,1941]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC241A0F89C4263F839" box="[663,846,1915,1941]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC240F2F89C454FF839" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[965,1122,1915,1941]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: figs. 4H, 5H); the merus of the female P4 has only one spine on the flexor margin (
<figureCitation id="13492A177A0AFFC2403BF8784247F815" box="[780,874,1951,1977]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="9" pageNumber="378">Fig. 6M</figureCitation>
) (versus five spines in
<taxonomicName id="4C724D117A0AFFC24746F8784405F815" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1137,1320,1951,1977]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="9" pageNumber="378" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A0AFFC24746F8784405F815" box="[1137,1320,1951,1977]" italics="true" pageId="9" pageNumber="378">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A0AFFC243A0F8244019F871" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[151,308,1987,2013]" pageId="9" pageNumber="378" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: fig. 5G); the male pleon is proportionally more elongate, with all sutures distinct and clearly visible, despite the immobility of the somites 4–6 (
<figureCitation id="13492A177A09FFC141B1FF7043CCFF1D" box="[646,737,151,177]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="10" pageNumber="379">Fig. 6G</figureCitation>
) (versus with lateral sutures between somites 4–6 shallow to undiscernible in
<taxonomicName id="4C724D117A09FFC14263FF5C4321FF79" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[340,524,187,213]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="10" pageNumber="379" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A09FFC14263FF5C4321FF79" box="[340,524,187,213]" italics="true" pageId="10" pageNumber="379">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A09FFC141B0FF5C420BFF79" author="Ahyong, S. T. &amp; Ng, P. K. L." box="[647,806,187,213]" pageId="10" pageNumber="379" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: fig. 4J); and, finally, the G1 is overall stouter, with the distal part short and rounded, and with a subdistal projection (
<figureCitation id="13492A177A09FFC14008FF384295FF55" box="[831,952,222,249]" captionStart="FIGURE 5" captionStartId="7.[151,250,1552,1576]" captionTargetBox="[151,1435,181,1528]" captionTargetId="figure-17@7.[151,1435,181,1528]" captionTargetPageId="7" captionText="FIGURE 5. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A–D]; ovigerous female paratype (6.3 × 3.7 mm) from type locality, FLMNH UF 72877 [E, F, H]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [G]; A, E, cephalothorax showing orbits, epistome, antennules and antennae, frontal view; B, right chela (partially denuded), outer view; C, male buccal cavity and anterior thoracic sternum, ventral view; D, male anterior thoracic sternum and sternopleonal cavity, showing intact right G1, ventral view; F, right chela (denuded), outer view; G, female pleon; H, female sternopleonal cavity and vulvae, ventral view." figureDoi="http://doi.org/10.5281/zenodo.13618529" httpUri="https://zenodo.org/record/13618529/files/figure.png" pageId="10" pageNumber="379">Figs. 5E, F</figureCitation>
,
<figureCitation id="13492A177A09FFC140F5FF3842D6FF55" box="[962,1019,223,249]" captionStart="FIGURE 6" captionStartId="8.[151,250,1821,1845]" captionTargetBox="[158,1429,460,1791]" captionTargetId="figure-130@8.[151,1435,453,1798]" captionTargetPageId="8" captionText="FIGURE 6. Gustavus holthuisae sp. nov., male holotype (5.3 × 3.4 mm) from Thuwal, Saudi Arabia, FLMNH UF 72876 [A, C–J]; ovigerous female paratype (7.3 × 4.0 mm) from type locality, ZRC 2023.0580 [B, K–N]; A, B, right Mxp3 (setae denuded), outer view; C–F, male P2–P5, respectively, dorsal view; G, male pleon; H, left G1, ventral view (setae omitted); I, left G1, dorsal view (setae omitted); J, left G2, ventral view (setae omitted); K–N, female P2–P5, respectively, dorsal view. Scales: A, B, H–J = 0.2 mm; C–G, K–N = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13618533" httpUri="https://zenodo.org/record/13618533/files/figure.png" pageId="10" pageNumber="379">6H, I</figureCitation>
) (versus the G1 being relatively more slender, with the distal part more elongate and without a subdistal projection in
<taxonomicName id="4C724D117A09FFC14723FEE445E6FEB1" authorityName="Ahyong &amp; Ng" authorityYear="2009" box="[1044,1227,259,285]" class="Malacostraca" family="Aphanodactylidae" genus="Gustavus" kingdom="Animalia" order="Decapoda" pageId="10" pageNumber="379" phylum="Arthropoda" rank="species" species="mecognathus">
<emphasis id="B906EA807A09FFC14723FEE445E6FEB1" box="[1044,1227,259,285]" italics="true" pageId="10" pageNumber="379">G. mecognathus</emphasis>
</taxonomicName>
; cf. Ng &amp;
<bibRefCitation id="EFE34B637A09FFC14675FEE441FEFEED" author="Ahyong, S. T. &amp; Ng, P. K. L." pageId="10" pageNumber="379" pagination="33 - 47" refId="ref5317" refString="Ahyong, S. T. &amp; Ng, P. K. L. (2009) Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms. Zootaxa, 2289 (1), 33 - 47. https: // doi. org / 10.11646 / zootaxa. 2289.1.3" type="journal article" year="2009">Ahyong 2009</bibRefCitation>
: fig. 4K).
</paragraph>
</subSubSection>
</treatment>
</document>
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