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<document id="9DF2E3AFC68776970F234812A4BC3082" ID-DOI="10.11646/zootaxa.3664.2.5" ID-GBIF-Dataset="998f53b0-f46c-4525-bc3a-f8a597c01979" ID-ISSN="1175-5326" ID-Zenodo-Dep="220335" ID-ZooBank="5306204C-0DBC-4EE1-A008-B1582FA80243" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460616100831" checkinUser="plazi" docAuthor="Meland, Kenneth &amp; Aas, Pål Øyvind" docDate="2013" docId="03B587CDFFA1FFA81FDFFC99391FFE2C" docLanguage="en" docName="zt03664p225.pdf" docOrigin="Zootaxa 3664 (2)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Gnathophausia elegans G.O. Sars 1883" docType="treatment" docVersion="12" lastPageNumber="210" masterDocId="FF8CFFB5FFABFFA41F48FFDD3B64FF80" masterDocTitle="A taxonomical review of the Gnathophausia (Crustacea, Lophogastrida), with new records from the northern mid-Atlantic ridge" masterLastPageNumber="225" masterPageNumber="199" pageNumber="209" updateTime="1698330483512" updateUser="plazi">
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<mods:title id="088260D0A8DE9F70B6ED53CDAEFD342B">A taxonomical review of the Gnathophausia (Crustacea, Lophogastrida), with new records from the northern mid-Atlantic ridge</mods:title>
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<mods:name id="E5C876F049B5AD18E7D39A5545B2E808" type="personal">
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<mods:namePart id="8C2281E5F6BC94494D99690E68B6B0F3">Meland, Kenneth</mods:namePart>
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<mods:namePart id="E1C80B422E9F304E7D6D42DCB14A8F88">Aas, Pål Øyvind</mods:namePart>
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<mods:title id="82E2412E54E9BD78249206F498D2E6A1">Zootaxa</mods:title>
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<mods:date id="779CEFAC38755792F81D653BB36599F6">2013</mods:date>
<mods:detail id="563FF45604511C14F43975244CCA2BC5" type="volume">
<mods:number id="299B7B8DC9824D574A0C0AA8E36A963A">3664</mods:number>
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<mods:identifier id="44F2C1EC289D4185624F060E5DF52234" type="DOI">10.11646/zootaxa.3664.2.5</mods:identifier>
<mods:identifier id="43DC0CC8E5C69AAD659E4C31A9042F32" type="GBIF-Dataset">998f53b0-f46c-4525-bc3a-f8a597c01979</mods:identifier>
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<treatment id="03B587CDFFA1FFA81FDFFC99391FFE2C" ID-DOI="http://doi.org/10.5281/zenodo.6162699" ID-GBIF-Taxon="119568736" ID-Zenodo-Dep="6162699" LSID="urn:lsid:plazi:treatment:03B587CDFFA1FFA81FDFFC99391FFE2C" httpUri="http://treatment.plazi.org/id/03B587CDFFA1FFA81FDFFC99391FFE2C" lastPageId="12" lastPageNumber="210" pageId="10" pageNumber="209">
<subSubSection id="C3066550FFA1FFAE1FDFFC993B8FFCFE" pageId="10" pageNumber="209" type="nomenclature">
<paragraph id="8BA336DBFFA1FFAE1FDFFC993918FCDD" blockId="10.[151,636,835,894]" box="[151,636,835,862]" pageId="10" pageNumber="209">
<heading id="D0EB81B7FFA1FFAE1FDFFC993918FCDD" bold="true" box="[151,636,835,862]" fontSize="11" level="1" pageId="10" pageNumber="209" reason="1">
<taxonomicName id="4C1C4D58FFA1FFAE1FDFFC993918FCDD" authority="G.O. Sars, 1883" authorityName="G.O. Sars" authorityYear="1883" box="[151,636,835,862]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="10" pageNumber="209" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA1FFAE1FDFFC993918FCDD" bold="true" box="[151,636,835,862]" pageId="10" pageNumber="209">
<emphasis id="B968EAC9FFA1FFAE1FDFFC993AD0FCDE" bold="true" box="[151,436,836,862]" italics="true" pageId="10" pageNumber="209">Gnathophausia elegans</emphasis>
G.O. Sars, 1883
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="8BA336DBFFA1FFAE1FDFFCBB3B8FFCFE" blockId="10.[151,636,835,894]" box="[151,235,870,894]" pageId="10" pageNumber="209">
(
<figureCitation id="13272A5EFFA1FFAE1FD7FCBB3B87FCFE" box="[159,227,870,894]" captionStart="FIGURE 7" captionStartId="10.[151,250,1981,2004]" captionTargetBox="[177,1432,1365,1950]" captionTargetId="figure@10.[151,1436,1356,1966]" captionTargetPageId="10" captionText="FIGURE 7. Gnathophausia elegans G. O. Sars, 1883. Adult female. A, lateral view; B, dorsal view; C, antenna; D, telson (dorsal view); E, apex of telson (from G. O. Sars 1885: pl. VI, figs. 1 – 5)." httpUri="https://zenodo.org/record/220342/files/figure.png" pageId="10" pageNumber="209">Fig. 7</figureCitation>
)
</paragraph>
</subSubSection>
<paragraph id="8BA336DBFFA1FFAE1FDFFC7239F5FB81" pageId="10" pageNumber="209">
<table id="F91CC47BFFA1005B1FDFFC733EF8FB82" box="[151,1436,942,1026]" gridcols="6" gridrows="3" pageId="10" pageNumber="209">
<tr id="352C3499FFA1005B1FDFFC733EF8FC45" box="[151,1436,942,965]" gridrow="0" pageId="10" pageNumber="209">
<th id="76FD5DE5FFA1005B1FDFFC7339AEFC45" box="[151,714,942,965]" gridcol="0" gridrow="0" pageId="10" pageNumber="209">
<taxonomicName id="4C1C4D58FFA1FFAE1FDFFC723931FC44" authority="G.O. Sars, 1883:7" authorityName="G.O. Sars" authorityPageNumber="7" authorityYear="1883" box="[151,597,943,965]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="10" pageNumber="209" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA1FFAE1FDFFC723AE8FC45" box="[151,396,943,965]" italics="true" pageId="10" pageNumber="209">Gnathophausia elegans</emphasis>
G.O. Sars, 1883:7
</taxonomicName>
–8.—W.M.
</th>
<th id="76FD5DE5FFA1005B1D9EFC733850FC45" box="[726,820,942,965]" gridcol="1" gridrow="0" pageId="10" pageNumber="209">Tattersall</th>
<th id="76FD5DE5FFA1005B1C08FC733895FC45" box="[832,1009,942,965]" gridcol="2" gridrow="0" pageId="10" pageNumber="209">1939:228;—Fage</th>
<th id="76FD5DE5FFA1005B1CB6FC733F5CFC45" box="[1022,1080,942,965]" gridcol="3" gridrow="0" pageId="10" pageNumber="209">1941:</th>
<th id="76FD5DE5FFA1005B1B0CFC733F9CFC45" box="[1092,1272,942,965]" gridcol="4" gridrow="0" pageId="10" pageNumber="209">41–44.—Bacescu</th>
<th id="76FD5DE5FFA1005B1A4BFC733EF8FC45" box="[1283,1436,942,965]" gridcol="5" gridrow="0" pageId="10" pageNumber="209">1991:87–88.—</th>
</tr>
<tr id="352C3499FFA1005B1FDFFC103EF8FC63" box="[151,1436,973,995]" gridrow="1" pageId="10" pageNumber="209" rowspan-1="1" rowspan-2="1" rowspan-3="1" rowspan-4="1" rowspan-5="1">
<th id="76FD5DE5FFA1005B1FDFFC1039AEFC63" box="[151,714,973,995]" gridcol="0" gridrow="1" pageId="10" pageNumber="209">Casanova 1996a: 129.</th>
</tr>
<tr id="352C3499FFA1005B1FDFFC363EF8FB82" box="[151,1436,1003,1026]" gridrow="2" pageId="10" pageNumber="209" rowspan-1="1" rowspan-2="1" rowspan-3="1" rowspan-4="1" rowspan-5="1">
<th id="76FD5DE5FFA1005B1FDFFC3639AEFB82" box="[151,714,1003,1026]" gridcol="0" gridrow="2" pageId="10" pageNumber="209">
<emphasis id="B968EAC9FFA1FFAE1FDFFC313AC0FB82" box="[151,420,1004,1026]" italics="true" pageId="10" pageNumber="209">
<taxonomicName id="4C1C4D58FFA1FFAE1FDFFC313A57FB82" box="[151,307,1004,1026]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="10" pageNumber="209" phylum="Arthropoda" rank="genus">Gnathophausia</taxonomicName>
elegansi—
</emphasis>
G.O. Sars 1885: 42–43.
</th>
</tr>
</table>
</paragraph>
<subSubSection id="C3066550FFA1FFAF1FDFFBF3395CFF77" lastPageId="11" lastPageNumber="210" pageId="10" pageNumber="209" type="diagnosis">
<paragraph id="8BA336DBFFA1FFAF1FDFFBF3395CFF77" blockId="10.[151,1437,1070,1310]" lastBlockId="11.[151,1436,151,536]" lastPageId="11" lastPageNumber="210" pageId="10" pageNumber="209">
<emphasis id="B968EAC9FFA1FFAE1FDFFBF33A75FBC7" bold="true" box="[151,273,1070,1095]" pageId="10" pageNumber="209">Diagnosis.</emphasis>
Body slender. Carapace does not cover last thorax somite; rostrum elongate, equaling carapace in length, denticulate; posterodorsal spine extending past second abdominal somite; posterolateral margins rounded; dorsal keel present, continuous, extending onto rostrum and posterodorsal spine, upper lateral keels absent or closely flanking dorsal keel; lower lateral keels distinct, curves upwards towards posterior end and merges into marginal keel beneath base of posterodorsal spine; supra-orbital spines well developed; branchiostegal expansions evenly rounded; antennal spines small. Outer spine of antennal scale extending past terminal lobe. Abdominal somites slender, dorsal spines absent, ventral margin of pleura drawn out into posterior projected spine. Telson as long as uropods; linguiform, distal two-thirds of lateral margins armed with spiniform setae; apex heart-shaped armed with two pairs of large spiniform setae, posterior margin fringed with serrated edge. Obtains lengths up to
<quantity id="4CE49B3EFFA0FFAF1AC8FF613BA7FF77" metricMagnitude="-2" metricUnit="m" metricValue="5.6" pageId="11" pageNumber="210" unit="mm" value="56.0">56 mm</quantity>
(G.O. Sars 1885; Bacescu 1991).
</paragraph>
</subSubSection>
<caption id="DF636653FFA1FFAE1FDFF8603814F872" httpUri="https://zenodo.org/record/220342/files/figure.png" pageId="10" pageNumber="209" targetBox="[177,1432,1365,1950]" targetPageId="10">
<paragraph id="8BA336DBFFA1FFAE1FDFF8603814F872" blockId="10.[151,1436,1981,2034]" pageId="10" pageNumber="209">
<emphasis id="B968EAC9FFA1FFAE1FDFF8603A71F853" bold="true" box="[151,277,1981,2004]" pageId="10" pageNumber="209">FIGURE 7.</emphasis>
<taxonomicName id="4C1C4D58FFA1FFAE1E57F86039A0F853" authority="G.O. Sars, 1883" authorityName="G.O. Sars" authorityYear="1883" box="[287,708,1981,2003]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="10" pageNumber="209" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA1FFAE1E57F8603975F853" box="[287,529,1981,2003]" italics="true" pageId="10" pageNumber="209">Gnathophausia elegans</emphasis>
G.O. Sars, 1883
</taxonomicName>
. Adult female. A, lateral view; B, dorsal view; C, antenna; D, telson (dorsal view); E, apex of telson (from G.O. Sars 1885: pl. VI, figs. 1–5).
</paragraph>
</caption>
<subSubSection id="C3066550FFA0FFAF1F8FFEDE3922FE07" pageId="11" pageNumber="210" type="distribution">
<paragraph id="8BA336DBFFA0FFAF1F8FFEDE3922FE07" blockId="11.[151,1436,151,536]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1F8FFEDE3A04FE9C" bold="true" box="[199,352,259,284]" pageId="11" pageNumber="210">Distribution.</emphasis>
<taxonomicName id="4C1C4D58FFA0FFAF1E21FED83ABBFE9C" box="[361,479,260,284]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA0FFAF1E21FED83ABBFE9C" box="[361,479,260,284]" italics="true" pageId="11" pageNumber="210">G. elegans</emphasis>
</taxonomicName>
is only known from West Pacific waters. It has been collected as far north as
<collectingCountry id="F30B764BFFA0FFAF1A14FED83EF8FE9C" box="[1372,1436,261,284]" name="Japan" pageId="11" pageNumber="210">Japan</collectingCountry>
(W.M. Tattersall 1939), in
<collectingCountry id="F30B764BFFA0FFAF1E89FEFA394AFEBF" box="[449,558,295,319]" name="Indonesia" pageId="11" pageNumber="210">Indonesia</collectingCountry>
(Casanova 1996a), the
<collectingCountry id="F30B764BFFA0FFAF1C7EFEFA38D0FEBF" box="[822,948,295,319]" name="Philippines" pageId="11" pageNumber="210">Philippines</collectingCountry>
(Bacescu 1991; W.M. Tattersall 1939), and as far south as the
<collectingCountry id="F30B764BFFA0FFAF1E2CFE913A84FEE4" box="[356,480,332,356]" name="Fiji" pageId="11" pageNumber="210">Fiji islands</collectingCountry>
(G.O. Sars 1883) and
<collectingCountry id="F30B764BFFA0FFAF1D9FFE9038E0FEE4" box="[727,900,332,356]" name="New Caledonia" pageId="11" pageNumber="210">New Caledonia</collectingCountry>
(Casanova 1993).
<taxonomicName id="4C1C4D58FFA0FFAF1B1DFE903FAEFEE4" box="[1109,1226,332,356]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA0FFAF1B1DFE903FAEFEE4" box="[1109,1226,332,356]" italics="true" pageId="11" pageNumber="210">G. elegans</emphasis>
</taxonomicName>
has been collected at depths ranging from
<quantity id="4CE49B3EFFA0FFAF1ED4FEB23926FE07" box="[412,578,367,391]" metricMagnitude="3" metricUnit="m" metricValue="2.214" metricValueMax="4.161" metricValueMin="0.267" pageId="11" pageNumber="210" unit="m" value="2214.0" valueMax="4161.0" valueMin="267.0">267 to 4161 m</quantity>
.
</paragraph>
</subSubSection>
<subSubSection id="C3066550FFA0FFAF1F8FFE493B8FFD27" pageId="11" pageNumber="210" type="discussion">
<paragraph id="8BA336DBFFA0FFAF1F8FFE49381DFD97" blockId="11.[151,1436,151,536]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1F8FFE493A5FFE2C" bold="true" box="[199,315,404,428]" pageId="11" pageNumber="210">Remarks.</emphasis>
<taxonomicName id="4C1C4D58FFA0FFAF1E01FE483AA1FE2C" box="[329,453,404,428]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA0FFAF1E01FE483AA1FE2C" box="[329,453,404,428]" italics="true" pageId="11" pageNumber="210">G. elegans</emphasis>
</taxonomicName>
belongs to a morphogroup of
<taxonomicName id="4C1C4D58FFA0FFAF1C0DFE493896FE2C" box="[837,1010,404,428]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="genus">
<emphasis id="B968EAC9FFA0FFAF1C0DFE493896FE2C" box="[837,1010,404,428]" italics="true" pageId="11" pageNumber="210">Gnathophausia</emphasis>
</taxonomicName>
that do not have their dorsal keel interrupted by the cervical sulcus (
<figureCitation id="13272A5EFFA0FFAF1D50FE6A393FFE4F" box="[536,603,439,463]" captionStart="FIGURE 7" captionStartId="10.[151,250,1981,2004]" captionTargetBox="[177,1432,1365,1950]" captionTargetId="figure@10.[151,1436,1356,1966]" captionTargetPageId="10" captionText="FIGURE 7. Gnathophausia elegans G. O. Sars, 1883. Adult female. A, lateral view; B, dorsal view; C, antenna; D, telson (dorsal view); E, apex of telson (from G. O. Sars 1885: pl. VI, figs. 1 – 5)." httpUri="https://zenodo.org/record/220342/files/figure.png" pageId="11" pageNumber="210">Fig. 7</figureCitation>
A). Coupled with conspicuous lower lateral keels that extend post-dorsally and merge into the marginal keels (
<figureCitation id="13272A5EFFA0FFAF1D69FE013907FE74" box="[545,611,476,500]" captionStart="FIGURE 7" captionStartId="10.[151,250,1981,2004]" captionTargetBox="[177,1432,1365,1950]" captionTargetId="figure@10.[151,1436,1356,1966]" captionTargetPageId="10" captionText="FIGURE 7. Gnathophausia elegans G. O. Sars, 1883. Adult female. A, lateral view; B, dorsal view; C, antenna; D, telson (dorsal view); E, apex of telson (from G. O. Sars 1885: pl. VI, figs. 1 – 5)." httpUri="https://zenodo.org/record/220342/files/figure.png" pageId="11" pageNumber="210">Fig. 7</figureCitation>
A),
<taxonomicName id="4C1C4D58FFA0FFAF1DC7FE003867FE74" box="[655,771,476,500]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA0FFAF1DC7FE003867FE74" box="[655,771,476,500]" italics="true" pageId="11" pageNumber="210">G. elegans</emphasis>
</taxonomicName>
is quite distinct from other
<taxonomicName id="4C1C4D58FFA0FFAF1B71FE013F81FE74" box="[1081,1253,476,500]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="genus">
<emphasis id="B968EAC9FFA0FFAF1B71FE013F81FE74" box="[1081,1253,476,500]" italics="true" pageId="11" pageNumber="210">Gnathophausia</emphasis>
</taxonomicName>
, but bears some resemblance to
<taxonomicName id="4C1C4D58FFA0FFAF1E0EFDDD3AF9FD98" box="[326,413,512,536]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA0FFAF1E0EFDDD3AF9FD98" box="[326,413,512,536]" italics="true" pageId="11" pageNumber="210">G. fagei</emphasis>
</taxonomicName>
(see discussion in “Remarks” of
<taxonomicName id="4C1C4D58FFA0FFAF1C5AFDDD380DFD98" box="[786,873,512,536]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA0FFAF1C5AFDDD380DFD98" box="[786,873,512,536]" italics="true" pageId="11" pageNumber="210">G. fagei</emphasis>
</taxonomicName>
).
</paragraph>
<paragraph id="8BA336DBFFA0FFAF1FDFFDB63B8FFD27" blockId="11.[151,588,619,679]" pageId="11" pageNumber="210">
<taxonomicName id="4C1C4D58FFA0FFAF1FDFFDB63928FD04" authority="Casanova, 1996" authorityName="Casanova" authorityYear="1996" box="[151,588,619,644]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA0FFAF1FDFFDB63928FD04" bold="true" box="[151,588,619,644]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1FDFFDB63AEFFD04" bold="true" box="[151,395,619,644]" italics="true" pageId="11" pageNumber="210">Gnathophausia fagei</emphasis>
Casanova, 1996
</emphasis>
</taxonomicName>
(
<figureCitation id="13272A5EFFA0FFAF1FD7FD523B86FD27" box="[159,226,655,679]" captionStart="FIGURE 8" captionStartId="11.[151,250,1833,1856]" captionTargetBox="[156,1430,1226,1814]" captionTargetId="figure@11.[156,1431,1226,1814]" captionTargetPageId="11" captionText="FIGURE 8. Gnathophausia fagei Casanova, 1996. A, carapace, lateral view; B, abdominal somite six; C, telson." httpUri="https://zenodo.org/record/220343/files/figure.png" pageId="11" pageNumber="210">Fig. 8</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C3066550FFA0FFAF1FDFFD0539E8FC8C" pageId="11" pageNumber="210" type="description">
<paragraph id="8BA336DBFFA0FFAF1FDFFD0539E8FC8C" blockId="11.[151,659,728,781]" pageId="11" pageNumber="210">
<taxonomicName id="4C1C4D58FFA0FFAF1FDFFD053AA4FD6E" box="[151,448,728,750]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="subSpecies" species="elegans" subSpecies="fagei">
<emphasis id="B968EAC9FFA0FFAF1FDFFD053AA4FD6E" box="[151,448,728,750]" italics="true" pageId="11" pageNumber="210">Gnathophausia elegans fagei</emphasis>
</taxonomicName>
—Bacescu 1991: 88.
<taxonomicName id="4C1C4D58FFA0FFAF1FDFFD2A3937FC8C" authority="Casanova, 1996a: 129" authorityName="Casanova" authorityPageNumber="129" authorityYear="1996" box="[151,595,758,781]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA0FFAF1FDFFD2A3A08FC8D" box="[151,364,759,781]" italics="true" pageId="11" pageNumber="210">Gnathophausia fagei</emphasis>
Casanova, 1996a: 129
</taxonomicName>
–130.
</paragraph>
</subSubSection>
<subSubSection id="C3066550FFA0FFAF1FDFFCE43AF3FB15" pageId="11" pageNumber="210" type="diagnosis">
<paragraph id="8BA336DBFFA0FFAF1FDFFCE43AF3FB15" blockId="11.[151,1437,825,1173]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1FDFFCE43A75FCD2" bold="true" box="[151,273,825,850]" pageId="11" pageNumber="210">Diagnosis.</emphasis>
Body slender. Carapace does not cover last thorax somite; rostrum elongate, posterodorsal spine present; posterolateral margins rounded; dorsal keel present, continuous, extending onto rostrum and posterodorsal spine, upper lateral keels absent; lower lateral keels distinct, curve upwards towards base of posterodorsal spine, terminates abruptly, does not merge into the marginal keels; supra-orbital spines well developed; branchiostegal expansions evenly rounded; antennal spines small. Outer spine of antennal scale extending past the terminal lobe. Abdominal somites slender, dorsal spines absent, ventral margin of pleura on somites one to five drawn out into a posterior projected spine; spine positioned medially on first pseudo-somite of pleura six. Telson as long as uropods; linguiform, distal two-thirds of lateral margins armed with spiniform setae; apex heart shaped armed with two pairs of large spiniform setae, posterior margin fringed with a serrated edge. Obtains lengths up to
<quantity id="4CE49B3EFFA0FFAF1B84FB843E79FBF1" box="[1228,1309,1113,1137]" metricMagnitude="-2" metricUnit="m" metricValue="5.0" pageId="11" pageNumber="210" unit="mm" value="50.0">50 mm</quantity>
(Casanova 1996a; Bacescu 1991).
</paragraph>
</subSubSection>
<caption id="DF636653FFA0FFAF1FDFF8F43E74F8C0" box="[151,1296,1833,1856]" httpUri="https://zenodo.org/record/220343/files/figure.png" pageId="11" pageNumber="210" targetBox="[156,1430,1226,1814]" targetPageId="11">
<paragraph id="8BA336DBFFA0FFAF1FDFF8F43E74F8C0" blockId="11.[151,1296,1833,1856]" box="[151,1296,1833,1856]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1FDFF8F43A76F8BF" bold="true" box="[151,274,1833,1856]" pageId="11" pageNumber="210">FIGURE 8.</emphasis>
<taxonomicName id="4C1C4D58FFA0FFAF1E51F8F739FDF8C0" authority="Casanova, 1996" authorityName="Casanova" authorityYear="1996" box="[281,665,1834,1856]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA0FFAF1E51F8F73A8AF8C0" box="[281,494,1834,1856]" italics="true" pageId="11" pageNumber="210">Gnathophausia fagei</emphasis>
Casanova, 1996
</taxonomicName>
. A, carapace, lateral view; B, abdominal somite six; C, telson.
</paragraph>
</caption>
<subSubSection id="C3066550FFA0FFAF1F8FF8B438ABF826" pageId="11" pageNumber="210" type="distribution">
<paragraph id="8BA336DBFFA0FFAF1F8FF8B438ABF826" blockId="11.[151,1436,1897,2030]" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1F8FF8B43A04F802" bold="true" box="[199,352,1897,1922]" pageId="11" pageNumber="210">Distribution.</emphasis>
<emphasis id="B968EAC9FFA0FFAF1E20F8B63AD8F802" box="[360,444,1898,1922]" italics="true" pageId="11" pageNumber="210">G. f a g e i</emphasis>
has only bee reported on a few occasions from the
<typeStatus id="54A78879FFA0FFAF1B42F8B63F5EF803" box="[1034,1082,1899,1923]" pageId="11" pageNumber="210">type</typeStatus>
locality in the Makassar Strait, and from
<quantity id="4CE49B3EFFA0FFAF1E4CF8533AF4F826" box="[260,400,1934,1958]" metricMagnitude="2" metricUnit="m" metricValue="7.5" metricValueMax="10.0" metricValueMin="5.0" pageId="11" pageNumber="210" unit="m" value="750.0" valueMax="1000.0" valueMin="500.0">500–1000 m</quantity>
trenches south of Lubang Island, South
<collectingCountry id="F30B764BFFA0FFAF1C1DF85338FCF826" box="[853,920,1934,1958]" name="China" pageId="11" pageNumber="210">China</collectingCountry>
Sea.
</paragraph>
</subSubSection>
<subSubSection id="C3066550FFA0FFA81F8FF86F391FFE2C" lastPageId="12" lastPageNumber="211" pageId="11" pageNumber="210" type="discussion">
<paragraph id="8BA336DBFFA0FFA81F8FF86F391FFE2C" blockId="11.[151,1436,1897,2030]" lastBlockId="12.[151,1436,151,428]" lastPageId="12" lastPageNumber="211" pageId="11" pageNumber="210">
<emphasis id="B968EAC9FFA0FFAF1F8FF86F3A5FF84A" bold="true" box="[199,315,1970,1994]" pageId="11" pageNumber="210">Remarks.</emphasis>
<emphasis id="B968EAC9FFA0FFAF1E0BF86E3AF2F84A" box="[323,406,1970,1994]" italics="true" pageId="11" pageNumber="210">G. f a g e i</emphasis>
was first established as a subspecies of
<taxonomicName id="4C1C4D58FFA0FFAF1C29F86E38B3F84A" box="[865,983,1970,1994]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="11" pageNumber="210" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA0FFAF1C29F86E38B3F84A" box="[865,983,1970,1994]" italics="true" pageId="11" pageNumber="210">G. elegans</emphasis>
</taxonomicName>
by Bacescu (1991) for two females and one juvenile specimen obtained from
<collectingCountry id="F30B764BFFA0FFAF1D72F80B39C3F86E" box="[570,679,2006,2030]" name="Indonesia" pageId="11" pageNumber="210">Indonesia</collectingCountry>
at a depth of
<quantity id="4CE49B3EFFA0FFAF1C75F80B38F0F86E" box="[829,916,2006,2030]" metricMagnitude="3" metricUnit="m" metricValue="1.0" pageId="11" pageNumber="210" unit="m" value="1000.0">1000 m</quantity>
. Subspecies status was diagnosed based on the lower later keels of these specimens not merging into the marginal keels as seen in
<taxonomicName id="4C1C4D58FFA7FFA81B7FFF453FCFFF30" box="[1079,1195,152,176]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA7FFA81B7FFF453FCFFF30" box="[1079,1195,152,176]" italics="true" pageId="12" pageNumber="211">G. elegans</emphasis>
</taxonomicName>
. Similar abruption of lateral keels is also seen in
<taxonomicName id="4C1C4D58FFA7FFA81E87FF60393FFF54" box="[463,603,188,212]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="childressi">
<emphasis id="B968EAC9FFA7FFA81E87FF60393FFF54" box="[463,603,188,212]" italics="true" pageId="12" pageNumber="211">G. childressi</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1C4D58FFA7FFA81DDCFF613995FF54" box="[660,753,188,212]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="affinis">
<emphasis id="B968EAC9FFA7FFA81DDCFF613995FF54" box="[660,753,188,212]" italics="true" pageId="12" pageNumber="211">G.affinis</emphasis>
</taxonomicName>
, but both
<emphasis id="B968EAC9FFA7FFA81C2FFF6038DFFF54" box="[871,955,188,212]" italics="true" pageId="12" pageNumber="211">G. f a g e i</emphasis>
and
<taxonomicName id="4C1C4D58FFA7FFA81CB0FF603F0AFF54" box="[1016,1134,188,212]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA7FFA81CB0FF603F0AFF54" box="[1016,1134,188,212]" italics="true" pageId="12" pageNumber="211">G. elegans</emphasis>
</taxonomicName>
can be distinguished from these two species by the dorsal keel being continuous and not interrupted by the cervical sulcus. Another distinguishing character for
<taxonomicName id="4C1C4D58FFA7FFA81E9EFED8394AFE9C" box="[470,558,260,284]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA7FFA81E9EFED8394AFE9C" box="[470,558,260,284]" italics="true" pageId="12" pageNumber="211">G. fagei</emphasis>
</taxonomicName>
is observed in the sixth abdominal pleura that are armed with medial ventral spines, opposed to a more posterior placement as observed in
<taxonomicName id="4C1C4D58FFA7FFA81CCEFEF53F65FEC0" box="[902,1025,296,320]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA7FFA81CCEFEF53F65FEC0" box="[902,1025,296,320]" italics="true" pageId="12" pageNumber="211">G. elegans</emphasis>
</taxonomicName>
(
<figureCitation id="13272A5EFFA7FFA81B5EFEFA3F3BFEBF" box="[1046,1119,295,319]" captionStart="FIGURE 7" captionStartId="10.[151,250,1981,2004]" captionTargetBox="[177,1432,1365,1950]" captionTargetId="figure@10.[151,1436,1356,1966]" captionTargetPageId="10" captionText="FIGURE 7. Gnathophausia elegans G. O. Sars, 1883. Adult female. A, lateral view; B, dorsal view; C, antenna; D, telson (dorsal view); E, apex of telson (from G. O. Sars 1885: pl. VI, figs. 1 – 5)." httpUri="https://zenodo.org/record/220342/files/figure.png" pageId="12" pageNumber="211">Fig. 7</figureCitation>
A). Considering overlap in distribution between
<taxonomicName id="4C1C4D58FFA7FFA81EC1FE903965FEE4" box="[393,513,332,356]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="elegans">
<emphasis id="B968EAC9FFA7FFA81EC1FE903965FEE4" box="[393,513,332,356]" italics="true" pageId="12" pageNumber="211">G. elegans</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1C4D58FFA7FFA81D75FE9039F2FEE4" box="[573,662,332,356]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA7FFA81D75FE9039F2FEE4" box="[573,662,332,356]" italics="true" pageId="12" pageNumber="211">G. fagei</emphasis>
</taxonomicName>
, coupled with only minor differences in morphology, which might possibly be due to morphogenetic variability between growth stages, only future records of additional specimens will help confirm species status of
<taxonomicName id="4C1C4D58FFA7FFA81D55FE483910FE2C" box="[541,628,404,428]" class="Malacostraca" family="Lophogastridae" genus="Gnathophausia" kingdom="Animalia" order="Lophogastrida" pageId="12" pageNumber="211" phylum="Arthropoda" rank="species" species="fagei">
<emphasis id="B968EAC9FFA7FFA81D55FE483910FE2C" box="[541,628,404,428]" italics="true" pageId="12" pageNumber="211">G. fagei</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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