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<document id="CDD6AF58A2898C3DCF1E85ABE43FC52A" ID-CLB-Dataset="9255" ID-DOI="10.5252/zoosystema2018v40a26" ID-GBIF-Dataset="2697b081-f3fa-4256-a62d-f084ee352b1c" ID-ISSN="1638-9387" ID-Zenodo-Dep="4336858" ID-ZooBank="urn:lsid:zoobank.org:pub:E018714D-7CCF-4AB8-A88A-EF033530CA75" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1608156727094" checkinUser="felipe" docAuthor="Guinot, Danièle, Ng, Ngan Kee &amp; Rodríguez Moreno, Paula A." docDate="2018" docId="039387B2FF9D2625FF181E86FA49F832" docLanguage="en" docName="Zoosystema.40.26.547-604.pdf" docOrigin="Zoosystema 40 (26)" docStyle="DocumentStyle:AFAF64E709DD7C8340B70A24A5804402.4:Zoosystema.2018-2019.journal_article" docStyleId="AFAF64E709DD7C8340B70A24A5804402" docStyleName="Zoosystema.2018-2019.journal_article" docStyleVersion="4" docTitle="Discoplax A. Milne-Edwards 1867" docType="treatment" docVersion="8" lastPageNumber="563" masterDocId="FFAAFFCAFF8F2637FFFB1A12FFECFFD9" masterDocTitle="Review of grapsoid families for the establishment of a new family for Leptograpsodes Montgomery, 1931, and a new genus of Gecarcinidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Grapsoidea MacLeay, 1838)" masterLastPageNumber="604" masterPageNumber="547" pageNumber="563" updateTime="1698847703829" updateUser="ExternalLinkService" zenodo-license-document="CC0-1.0" zenodo-license-figures="CC0-1.0" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="CEA139FD3F8B5BEFA955328D05FE77C6">Review of grapsoid families for the establishment of a new family for Leptograpsodes Montgomery, 1931, and a new genus of Gecarcinidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Grapsoidea MacLeay, 1838)</mods:title>
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<mods:namePart id="32A44BA88C369207A13E44AEAC24488C">Guinot, Danièle</mods:namePart>
<mods:affiliation id="2FC764192732978B04878470AE7B7618">Institut de Systématique, Évolution, Biodiversité (ISYEB), Muséum national dHistoire naturelle, CNRS, Sorbonne Université, EPHE, case postale 53, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) guinot @ mnhn. fr (corresponding author)</mods:affiliation>
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<mods:namePart id="65B484ED638C2B21FE423B51A90CDE87">Ng, Ngan Kee</mods:namePart>
<mods:affiliation id="A9BF65BB9CB51456C8EF24BF39FBFCEC">Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543 (Republic of Singapore) dbsngnk @ nus. edu. sg</mods:affiliation>
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<mods:namePart id="ED1702CCA704DB643EDFC62F0CC3AEE2">Rodríguez Moreno, Paula A.</mods:namePart>
<mods:affiliation id="D2A4A85631EF193BC5DE09177DF1ECA3">Direction générale déléguée aux Collections, Muséum national dHistoire naturelle, case postale 30, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) martin-lefevre @ mnhn. fr Dedicated to the memory of Michael Türkay (1948 - 2015)</mods:affiliation>
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<treatment id="039387B2FF9D2625FF181E86FA49F832" ID-DOI="http://doi.org/10.5281/zenodo.4331110" ID-GBIF-Taxon="176232319" ID-Zenodo-Dep="4331110" LSID="urn:lsid:plazi:treatment:039387B2FF9D2625FF181E86FA49F832" httpUri="http://treatment.plazi.org/id/039387B2FF9D2625FF181E86FA49F832" lastPageNumber="563" pageId="18" pageNumber="563">
<subSubSection id="C320652FFF9D2625FF181E86FD44FB77" box="[227,680,1172,1198]" pageId="18" pageNumber="563" type="nomenclature">
<paragraph id="8B8536A4FF9D2625FF181E86FD44FB77" blockId="18.[227,680,1172,1198]" box="[227,680,1172,1198]" pageId="18" pageNumber="563">
<heading id="D0CD81C8FF9D2625FF181E86FD44FB77" box="[227,680,1172,1198]" centered="true" fontSize="11" level="2" pageId="18" pageNumber="563" reason="2">
Genus
<taxonomicName id="4C3A4D27FF9D2625FECB1E86FD44FB77" ID-CoL="7NX5F" authority="A. Milne-Edwards, 1867" authorityName="A. Milne-Edwards" authorityYear="1867" box="[304,680,1172,1198]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="genus">
<emphasis id="B94EEAB6FF9D2625FECB1E86FE78FB77" box="[304,404,1172,1198]" italics="true" pageId="18" pageNumber="563">Discoplax</emphasis>
A. Milne-Edwards, 1867
</taxonomicName>
</heading>
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<subSubSection id="C320652FFF9D2625FF7F1EDFFECFFABD" pageId="18" pageNumber="563" type="materials_examined">
<paragraph id="8B8536A4FF9D2625FF7F1EDFFE28FB26" blockId="18.[132,775,1229,1280]" pageId="18" pageNumber="563">
<typeStatus id="54818806FF9D2625FF7F1EDFFF59FB3A" box="[132,181,1229,1252]" pageId="18" pageNumber="563">TYPE</typeStatus>
SPECIES. —
<taxonomicName id="4C3A4D27FF9D2625FEC81EDFFD37FB3C" authority="A. Milne-Edwards, 1867" authorityName="A. Milne-Edwards" authorityYear="1867" box="[307,731,1229,1253]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FEC81EDFFE32FB3C" box="[307,478,1229,1253]" italics="true" pageId="18" pageNumber="563">Discoplax longipes</emphasis>
A. Milne-Edwards, 1867
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(see N. K. Ng
<emphasis id="B94EEAB6FF9D2625FF131EFAFEFBFB26" box="[232,279,1255,1279]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
in press: fig. 2C).
</paragraph>
<paragraph id="8B8536A4FF9D2625FF7F1F0AFECFFABD" blockId="18.[132,775,1303,1380]" pageId="18" pageNumber="563">
OTHER SPECIES. —
<taxonomicName id="4C3A4D27FF9D2625FEB01F05FD36FAF6" authority="Ng &amp; Guinot, 2001" authorityName="Ng &amp; Guinot" authorityYear="2001" box="[331,730,1303,1327]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="gracilipes">
<emphasis id="B94EEAB6FF9D2625FEB01F05FDE8FAF6" box="[331,516,1303,1327]" italics="true" pageId="18" pageNumber="563">Discoplax gracilipes</emphasis>
<bibRefCitation id="EFAB4B55FF9D2625FDF71F05FD36FAF6" author="NG P. K. L. &amp; WANG C. - H. &amp; HO P. - H. &amp; SHIH H. - T." box="[524,730,1303,1327]" pageId="18" pageNumber="563" pagination="1 - 86" refId="ref59975" refString="NG P. K. L., WANG C. - H., HO P. - H. &amp; SHIH H. - T. 2001. - Anannotated checklist of brachyuran crabs from Taiwan (Crustacea: Decapoda). National Taiwan Museum Special Publication Series Taipei 11: 1 - 86." type="journal article" year="2001">Ng &amp; Guinot, 2001</bibRefCitation>
</taxonomicName>
(see N. K. Ng
<emphasis id="B94EEAB6FF9D2625FF151F20FEF3FA90" box="[238,287,1329,1353]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
in press: fig. 2B);
<taxonomicName id="4C3A4D27FF9D2625FE271F20FCEBFA90" authority="Ng &amp; Shih, 2015" authorityName="Ng &amp; Shih" authorityYear="2015" box="[476,775,1329,1354]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="michalis">
<emphasis id="B94EEAB6FF9D2625FE271F20FDA7FA90" box="[476,587,1329,1353]" italics="true" pageId="18" pageNumber="563">D. michalis</emphasis>
<bibRefCitation id="EFAB4B55FF9D2625FDA81F20FCEBFA90" author="NG P. K. L. &amp; SHIH H. - T." box="[595,775,1329,1354]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih, 2015</bibRefCitation>
</taxonomicName>
(not examined).
</paragraph>
</subSubSection>
<subSubSection id="C320652FFF9D2625FF7F1F86FAEEFAF7" pageId="18" pageNumber="563" type="diagnosis">
<paragraph id="8B8536A4FF9D2625FF7F1F86FF16FA75" blockId="18.[130,775,1428,2028]" box="[132,250,1428,1454]" pageId="18" pageNumber="563">DIAGNOSIS</paragraph>
<paragraph id="8B8536A4FF9D2625FF7F1FA1FAEEFAF7" blockId="18.[130,775,1428,2028]" lastBlockId="18.[811,1457,215,1326]" pageId="18" pageNumber="563">
Carapace not inflated (
<figureCitation id="13012A21FF9D2625FE861FA1FE18FA14" box="[381,500,1459,1485]" captionStart="FIG" captionStartId="20.[132,143,1847,1865]" captionTargetBox="[132,1455,212,1794]" captionTargetId="figure-250@20.[703,1280,727,1299]" captionTargetPageId="20" captionText="FIG. 4. — Carapaces of Gecarcinidae:Cardisoma Latreille,1828 (A-C), Discoplax A. Milne-Edwards,1867 (D, E) and Tuerkayana n. gen. (F-I): A, Cardisoma guanhumi Latreille, in Latreille,Le Peletier, Serville &amp; Guérin,1828, ♂ 56.5× 68.0 mm, Antilles,MNHN-IU-2013-14983 (=MNHN-B12270);B, C. carnifex (Herbst, 1796), ♂ 71.2 ×88.0 mm, French Polynesia, Society Islands, MNHN-IU-2013-14798; C, C. armatum Herklots, 1861, ♂ 51.6× 65.2 mm, Benin, MNHN-IU-2017-11710 (=MNHN-B21986);D, Discoplax longipes A.Milne-Edwards,1867,♂ 32.4× 37.2 mm,Loyalty Islands,Lifou,Inegoj Cave,MNHN-IU-2008-11402 (= MNHN-B24815); E, D. gracilipes Ng &amp; Guinot,2001, paratype,♂ 29.6 ×26.3 mm, Panglao Island,Bohol,Tawala Cave,MNHN-IU-2014-11217 (= MNHN-B27770);F, Tuerkayana aff. hirtipes (Dana,1851), ♂ 61.0× 79.0 mm,Loyalty Islands,Lifou Island,We cave,MNHN-IU-2017-8397 (=MNHN-B24811);G, Tuerkayana rotundum (Quoy &amp; Gaimard, 1824) n. comb.,♀ 32.7 ×40.1 mm,Loyalty Islands,MNHN-IU-2013-3740 (=MNHN-B13141);H, T. celeste (Ng &amp; Davie,2012) n. comb., ♂ 44.4 ×52.2 mm,Australia, Christmas Island (ZRC 2012.0171); I, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0 ×58.7 mm, Indonesia, Java, Cilacap (ZRC 2017.0252). Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336876" httpUri="https://zenodo.org/record/4336876/files/figure.png" pageId="18" pageNumber="563">Fig. 4D, E</figureCitation>
), the maximum recorded size being 61.7×
<quantity id="4CC29B41FF9D2625FECD1FC1FE74FA34" box="[310,408,1491,1517]" metricMagnitude="-2" metricUnit="m" metricValue="7.19" pageId="18" pageNumber="563" unit="mm" value="71.9">71.9 mm</quantity>
for
<taxonomicName id="4C3A4D27FF9D2625FE391FC6FDC0FA34" box="[450,556,1491,1517]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipe">
<emphasis id="B94EEAB6FF9D2625FE391FC6FDC0FA34" box="[450,556,1491,1517]" italics="true" pageId="18" pageNumber="563">D. longipe</emphasis>
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s; dorsal surface with regions distinctly marked, covered with granules; posterolateral regions with pronounced striae (
<bibRefCitation id="EFAB4B55FF9D2625FE221C01FD60F9F4" author="NG P. K. L. &amp; SHIH H. - T." box="[473,652,1554,1581]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: fig. 6); anterolateral margin well delimited, with a marked cleft (so “anterolateral margins unarmed”, in the diagnosis of
<taxonomicName id="4C3A4D27FF9D2625FD851C40FCEBF9B5" authorityName="H. Milne Edwards" authorityYear="1837" box="[638,775,1618,1644]" class="Malacostraca" family="Gecarcinidae" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="family">Gecarcinidae</taxonomicName>
by
<bibRefCitation id="EFAB4B55FF9D2625FF581C60FE4BF955" author="DAVIE P. J. F. &amp; GUINOT D. &amp; NG P. K. L." box="[163,423,1650,1677]" pageId="18" pageNumber="563" pagination="1049 - 1130" refId="ref51427" refString="DAVIE P. J. F., GUINOT D. &amp; NG P. K. L. 2015 c. - Systematics and classification of Brachyura (Chapter 71 - 18), in CASTRO P., DAVIE P. J. F., GUINOT D., SCHRAM F. R. &amp; VON VAUPEL KLEIN J. C. (eds), Decapoda: Brachyura, Treatise on Zoology - Anatomy, Taxonomy, Biology. Vol. 9 C- 2, Crustacea. Brill, Leiden and Boston: 1049 - 1130." type="book chapter" year="2015">
Davie
<emphasis id="B94EEAB6FF9D2625FF131C61FEF5F955" box="[232,281,1650,1676]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
2015c: 1117
</bibRefCitation>
, must be corrected); proepistome small, narrow, subquadrate; subhepatic and subbranchial areas heavily striated (
<figureCitation id="13012A21FF9D2625FECA1CA0FE6DF914" box="[305,385,1714,1741]" captionStart="FIG" captionStartId="24.[813,823,1804,1822]" captionTargetBox="[822,1441,215,1751]" captionTargetId="figure-725@24.[782,1305,754,1300]" captionTargetPageId="24" captionText="FIG. 6. — Ventral view of Gecarcinidae to show front, proepistome, cephalic appendages, orbit and mxp3: A, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815);B, Cardisoma guanhumi Latreille in Latreille,Le Peletier,Serville &amp; Guérin,1828,♂ 56.5×68.0 mm,Antilles,MNHN-IU-2013-14983 (=MNHN- B12270); C, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0× 79.0 mm, Loyalty Islands,Lifou Island,We cave,MNHN-IU-2017-8397 (=MNHN-B24811); D, T. celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4× 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; E, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336884" httpUri="https://zenodo.org/record/4336884/files/figure.png" pageId="18" pageNumber="563">Fig. 6A</figureCitation>
) (
<bibRefCitation id="EFAB4B55FF9D2625FE631CA1FDA0F914" author="NG P. K. L. &amp; SHIH H. - T." box="[408,588,1714,1741]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: fig. 7); orbit not closed laterally, with conspicuously granulated suborbital area; suborbital crest long, consisting of very small, close granules (
<figureCitation id="13012A21FF9D2625FF771D00FF32F8F4" box="[140,222,1810,1837]" captionStart="FIG" captionStartId="24.[813,823,1804,1822]" captionTargetBox="[822,1441,215,1751]" captionTargetId="figure-725@24.[782,1305,754,1300]" captionTargetPageId="24" captionText="FIG. 6. — Ventral view of Gecarcinidae to show front, proepistome, cephalic appendages, orbit and mxp3: A, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815);B, Cardisoma guanhumi Latreille in Latreille,Le Peletier,Serville &amp; Guérin,1828,♂ 56.5×68.0 mm,Antilles,MNHN-IU-2013-14983 (=MNHN- B12270); C, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0× 79.0 mm, Loyalty Islands,Lifou Island,We cave,MNHN-IU-2017-8397 (=MNHN-B24811); D, T. celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4× 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; E, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336884" httpUri="https://zenodo.org/record/4336884/files/figure.png" pageId="18" pageNumber="563">Fig. 6A</figureCitation>
) (
<bibRefCitation id="EFAB4B55FF9D2625FF0E1D00FE26F8F5" author="NG P. K. L. &amp; WANG C. - H. &amp; HO P. - H. &amp; SHIH H. - T." box="[245,458,1810,1836]" pageId="18" pageNumber="563" pagination="1 - 86" refId="ref59975" refString="NG P. K. L., WANG C. - H., HO P. - H. &amp; SHIH H. - T. 2001. - Anannotated checklist of brachyuran crabs from Taiwan (Crustacea: Decapoda). National Taiwan Museum Special Publication Series Taipei 11: 1 - 86." type="journal article" year="2001">Ng &amp; Guinot 2001</bibRefCitation>
: figs 5B, 6C, 9C;
<bibRefCitation id="EFAB4B55FF9D2625FD751D00FF50F895" author="NG P. K. L. &amp; SHIH H. - T." pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: fig. 7), here considered stridulatory pars stridens, rubbing on a thickened ridge (plectrum) located on inner magin of P1 merus (
<figureCitation id="13012A21FF9D2625FEF41D63FE83F852" box="[271,367,1905,1931]" captionStart="FIG" captionStartId="38.[813,824,1871,1889]" captionTargetBox="[844,1426,214,1824]" captionTargetId="figure-687@38.[842,1428,758,1312]" captionTargetPageId="38" captionText="FIG. 11. — Stridulatory apparatus:A, Discoplax longipes A.Milne-Edwards,1867, ♀ 32.6× 37 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815): plectrum as a ridge on cheliped merus (see arrow); B, C, Thalassograpsus harpax (Hilgendorf, 1892), ♂ 5.3× 5.7 mm, Scattered Islands,MNHN-IU-2013-16120; B, pars stridens consisting of elongated tubercles on suborbital ridge (see arrows);C, plectrum as a thickening (see arrow) on inner edge of cheliped merus. Scale bars: A, 5 mm; B, C, 2 mm." figureDoi="http://doi.org/10.5281/zenodo.4336902" httpUri="https://zenodo.org/record/4336902/files/figure.png" pageId="18" pageNumber="563">Fig. 11A</figureCitation>
), present in both sexes; male gonopore close to P5 coxo-sternal condyle and opening in middle of sternite 8 thus far from suture 7/8; penis proximally narrow, then more expanded (
<figureCitation id="13012A21FF9D2625FE931DC3FE56F835" box="[360,442,2001,2028]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5C</figureCitation>
); thoracic sternum not inclined posteriorly, wide, especially at level of sternite 4 (
<figureCitation id="13012A21FF9D2625FAA81AC5FCADFECB" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5A, B</figureCitation>
) (
<bibRefCitation id="EFAB4B55FF9D2625FCA21AEAFBC3FEC8" author="NG P. K. L. &amp; WANG C. - H. &amp; HO P. - H. &amp; SHIH H. - T." box="[857,1071,247,274]" pageId="18" pageNumber="563" pagination="1 - 86" refId="ref59975" refString="NG P. K. L., WANG C. - H., HO P. - H. &amp; SHIH H. - T. 2001. - Anannotated checklist of brachyuran crabs from Taiwan (Crustacea: Decapoda). National Taiwan Museum Special Publication Series Taipei 11: 1 - 86." type="journal article" year="2001">Ng &amp; Guinot 2001</bibRefCitation>
: fig. 4A;
<bibRefCitation id="EFAB4B55FF9D2625FB6E1AEAFAA1FECB" author="NG P. K. L. &amp; SHIH H. - T." box="[1173,1357,247,274]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: figs 1G, 4D); sternites 1-3 forming a low plate; sternite 1 triangular, separated from sternite 2 by thick ridge anteriorly lined with granules (suture 1/2); sternite 2 short, flattened, separated from sternite 3 by thin, straight, complete sulcus (suture 2/3); no suture 3/4, without lateral trace; sternite 4 short and wide, with weakly concave lateral margins, thus only weakly restricted between the P1; very weak rim delineating margin of the sterno-pleonal cavity at level of telson; episternites 4-6 narrow, longitudinally directed; posterior sternites on same plane as preceding sternites; sternite 8 short but developed medially, the posterior emargination being far from reaching sternite 7; suture 7/8 rather short; thick and wide bridge at level of suture 6/7 (
<figureCitation id="13012A21FF9D2625FC0C1884FB89FD69" box="[1015,1125,661,688]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5B, C</figureCitation>
) (
<bibRefCitation id="EFAB4B55FF9D2625FB871884FAA0FD69" author="NG P. K. L. &amp; WANG C. - H. &amp; HO P. - H. &amp; SHIH H. - T." box="[1148,1356,662,688]" pageId="18" pageNumber="563" pagination="1 - 86" refId="ref59975" refString="NG P. K. L., WANG C. - H., HO P. - H. &amp; SHIH H. - T. 2001. - Anannotated checklist of brachyuran crabs from Taiwan (Crustacea: Decapoda). National Taiwan Museum Special Publication Series Taipei 11: 1 - 86." type="journal article" year="2001">Ng &amp; Guinot 2001</bibRefCitation>
: fig. 4A); median line on sternite 8 and extending on sternite 7 only, not extending on sternite 6 (
<figureCitation id="13012A21FF9D2625FB9E18C7FB56FD29" box="[1125,1210,725,752]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5C</figureCitation>
); no visible portion of sternite 8 when pleon is folded; on sternite 5 acute pressbuttons close to suture 4/5, observed in
<taxonomicName id="4C3A4D27FF9D2625FB2C1904FAA5FCF6" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1239,1353,789,815]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FB2C1904FAA5FCF6" box="[1239,1353,789,815]" italics="true" pageId="18" pageNumber="563">D. longipes</emphasis>
</taxonomicName>
(
<figureCitation id="13012A21FF9D2625FAAC1907FA4BFCE9" box="[1367,1447,789,816]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5B</figureCitation>
) and
<taxonomicName id="4C3A4D27FF9D2625FCA11924FC35FC96" authorityName="Ng &amp; Guinot" authorityYear="2001" box="[858,985,821,847]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="gracilipes">
<emphasis id="B94EEAB6FF9D2625FCA11924FC35FC96" box="[858,985,821,847]" italics="true" pageId="18" pageNumber="563">D. gracilipes</emphasis>
</taxonomicName>
(character not mentioned in the description of
<taxonomicName id="4C3A4D27FF9D2625FCB71944FC26FCB6" authorityName="Ng &amp; Shih" authorityYear="2015" box="[844,970,853,879]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="michalis">
<emphasis id="B94EEAB6FF9D2625FCB71944FC26FCB6" box="[844,970,853,879]" italics="true" pageId="18" pageNumber="563">D. michalis</emphasis>
</taxonomicName>
), however hardly visible due to dense setal cover (a trace in female
<taxonomicName id="4C3A4D27FF9D2625FBD71964FB72FC56" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1068,1182,885,911]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FBD71964FB72FC56" box="[1068,1182,885,911]" italics="true" pageId="18" pageNumber="563">D. longipes</emphasis>
</taxonomicName>
32.6× 37.0 mm) (
<bibRefCitation id="EFAB4B55FF9D2625FA9D1967FC71FC76" author="KOHNK S. &amp; GORB S. &amp; BRANDIS D." pageId="18" pageNumber="563" pagination="2087 - 2132" refId="ref56245" refString="KOHNK S., GORB S. &amp; BRANDIS D. 2017. - The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda). Journal of Natural History 51 (35 - 36): 2087 - 2132. https: // doi. org / 10.1080 / 00222933.2017.1355076" type="journal article" year="2017">
Köhnk
<emphasis id="B94EEAB6FF9D2625FCD61984FCB3FC76" box="[813,863,917,943]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
2017
</bibRefCitation>
: fig. 19a), thus pleonal locking perhaps no longer functional over a certain size; socket on pleonal somite 6 not easily noticeable, except for small cuticular border (
<bibRefCitation id="EFAB4B55FF9D2625FA9819C6FC70FBD6" author="KOHNK S. &amp; GORB S. &amp; BRANDIS D." pageId="18" pageNumber="563" pagination="2087 - 2132" refId="ref56245" refString="KOHNK S., GORB S. &amp; BRANDIS D. 2017. - The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda). Journal of Natural History 51 (35 - 36): 2087 - 2132. https: // doi. org / 10.1080 / 00222933.2017.1355076" type="journal article" year="2017">
Köhnk
<emphasis id="B94EEAB6FF9D2625FCD619E7FCB3FBD7" box="[813,863,1012,1038]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
2017
</bibRefCitation>
: fig. 19b); sterno-pleonal cavity wide; pleon long, reaching sternite 3, subdistally wide; pleonal somite 4 especially broad; telson short, rounded (
<figureCitation id="13012A21FF9D2625FB621E26FB0AFB96" box="[1177,1254,1076,1103]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5A</figureCitation>
) (
<bibRefCitation id="EFAB4B55FF9D2625FB001E27FA44FB96" author="NG P. K. L. &amp; SHIH H. - T." box="[1275,1448,1076,1103]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: figs 8, 9); heterochely very weak, male chelipeds may be only slightly subequal; P2, P3 elongated and slender, covered with distinct granules and/or striae, appearing very rugose; dorsal margins of merus granulated; only lateral margins of propodus and dactylus with short stiff spines or setae (
<bibRefCitation id="EFAB4B55FF9D2625FACD1EC6FC89FAD7" author="NG P. K. L. &amp; SHIH H. - T." pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: fig. 10); G1 proportionally short (
<bibRefCitation id="EFAB4B55FF9D2625FB171EE6FA44FAD7" author="NG P. K. L. &amp; SHIH H. - T." box="[1260,1448,1267,1294]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: figs 11, 13-15,
<taxonomicName id="4C3A4D27FF9D2625FC2A1F06FBAFFAF4" authorityName="A. Milne-Edwards" authorityYear="1867" box="[977,1091,1299,1325]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FC2A1F06FBAFFAF4" box="[977,1091,1299,1325]" italics="true" pageId="18" pageNumber="563">D. longipes</emphasis>
</taxonomicName>
and
<taxonomicName id="4C3A4D27FF9D2625FB811F06FB1EFAF4" authorityName="Ng &amp; Shih" authorityYear="2015" box="[1146,1266,1299,1325]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="michalis">
<emphasis id="B94EEAB6FF9D2625FB811F06FB1EFAF4" box="[1146,1266,1299,1325]" italics="true" pageId="18" pageNumber="563">D. michalis</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
<subSubSection id="C320652FFF9D2625FCD61F46FA49F832" pageId="18" pageNumber="563" type="discussion">
<paragraph id="8B8536A4FF9D2625FCD61F46FC7DFAB5" blockId="18.[810,1456,1364,2028]" box="[813,913,1364,1390]" pageId="18" pageNumber="563">REMARKS</paragraph>
<paragraph id="8B8536A4FF9D2625FCD61F61FB6DF935" blockId="18.[810,1456,1364,2028]" pageId="18" pageNumber="563">
A particular character not previously noted in
<taxonomicName id="4C3A4D27FF9D2625FAF41F61FA9FFA54" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1295,1395,1395,1421]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="genus">
<emphasis id="B94EEAB6FF9D2625FAF41F61FA9FFA54" box="[1295,1395,1395,1421]" italics="true" pageId="18" pageNumber="563">Discoplax</emphasis>
</taxonomicName>
is the presence of a large, laterally opened orbit, with the suborbital crest forming a stridulating pars stridens (
<figureCitation id="13012A21FF9D2625FB0A1FA1FAAAFA17" box="[1265,1350,1459,1486]" captionStart="FIG" captionStartId="24.[813,823,1804,1822]" captionTargetBox="[822,1441,215,1751]" captionTargetId="figure-725@24.[782,1305,754,1300]" captionTargetPageId="24" captionText="FIG. 6. — Ventral view of Gecarcinidae to show front, proepistome, cephalic appendages, orbit and mxp3: A, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815);B, Cardisoma guanhumi Latreille in Latreille,Le Peletier,Serville &amp; Guérin,1828,♂ 56.5×68.0 mm,Antilles,MNHN-IU-2013-14983 (=MNHN- B12270); C, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0× 79.0 mm, Loyalty Islands,Lifou Island,We cave,MNHN-IU-2017-8397 (=MNHN-B24811); D, T. celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4× 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; E, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336884" httpUri="https://zenodo.org/record/4336884/files/figure.png" pageId="18" pageNumber="563">Fig. 6A</figureCitation>
); a thickened ridge close to the inner margin of the cheliped merus represents the plectrum (
<figureCitation id="13012A21FF9D2625FBC81FE1FB7FF9D4" box="[1075,1171,1523,1549]" captionStart="FIG" captionStartId="38.[813,824,1871,1889]" captionTargetBox="[844,1426,214,1824]" captionTargetId="figure-687@38.[842,1428,758,1312]" captionTargetPageId="38" captionText="FIG. 11. — Stridulatory apparatus:A, Discoplax longipes A.Milne-Edwards,1867, ♀ 32.6× 37 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815): plectrum as a ridge on cheliped merus (see arrow); B, C, Thalassograpsus harpax (Hilgendorf, 1892), ♂ 5.3× 5.7 mm, Scattered Islands,MNHN-IU-2013-16120; B, pars stridens consisting of elongated tubercles on suborbital ridge (see arrows);C, plectrum as a thickening (see arrow) on inner edge of cheliped merus. Scale bars: A, 5 mm; B, C, 2 mm." figureDoi="http://doi.org/10.5281/zenodo.4336902" httpUri="https://zenodo.org/record/4336902/files/figure.png" pageId="18" pageNumber="563">Fig. 11A</figureCitation>
). This disposition has been observed in the both sexes of
<taxonomicName id="4C3A4D27FF9D2625FB921C01FB30F9F5" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1129,1244,1554,1580]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FB921C01FB30F9F5" box="[1129,1244,1554,1580]" italics="true" pageId="18" pageNumber="563">D. longipes</emphasis>
</taxonomicName>
and
<taxonomicName id="4C3A4D27FF9D2625FAE81C01FA7EF9F5" authorityName="Ng &amp; Guinot" authorityYear="2001" box="[1299,1426,1554,1580]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="gracilipes">
<emphasis id="B94EEAB6FF9D2625FAE81C01FA7EF9F5" box="[1299,1426,1554,1580]" italics="true" pageId="18" pageNumber="563">D. gracilipes</emphasis>
</taxonomicName>
of the MNHN collection. Given the similar morphology of the orbital area of
<taxonomicName id="4C3A4D27FF9D2625FC311C41FBAEF9B5" authorityName="Ng &amp; Shih" authorityYear="2015" box="[970,1090,1618,1644]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="michalis">
<emphasis id="B94EEAB6FF9D2625FC311C41FBAEF9B5" box="[970,1090,1618,1644]" italics="true" pageId="18" pageNumber="563">D. michalis</emphasis>
</taxonomicName>
(
<bibRefCitation id="EFAB4B55FF9D2625FBA81C41FAE0F9B4" author="NG P. K. L. &amp; SHIH H. - T." box="[1107,1292,1618,1645]" pageId="18" pageNumber="563" pagination="379 - 405" refId="ref59635" refString="NG P. K. L. &amp; SHIH H. - T. 2015. - The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa 3980 (3): 379 - 405. https: // doi. org / 10.11646 / zootaxa. 3980.3.3" type="journal article" year="2015">Ng &amp; Shih 2015</bibRefCitation>
: fig. 7G, H), a comparable stidulating apparatus may characterise this species. Note that stridulatory structures occur only in
<taxonomicName id="4C3A4D27FF9D2625FAB01C80FA43F975" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1355,1455,1682,1708]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="genus">
<emphasis id="B94EEAB6FF9D2625FAB01C80FA43F975" box="[1355,1455,1682,1708]" italics="true" pageId="18" pageNumber="563">Discoplax</emphasis>
</taxonomicName>
and are lacking in
<emphasis id="B94EEAB6FF9D2625FC081CA0FB0EF915" box="[1011,1250,1714,1740]" italics="true" pageId="18" pageNumber="563">
<taxonomicName id="4C3A4D27FF9D2625FC081CA0FB72F915" box="[1011,1182,1714,1740]" class="Malacostraca" family="Gecarcinidae" genus="Cardisoma" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="sensu">
Cardisoma
<taxonomicNameLabel id="A27D57CDFF9D2625FB911CA1FB72F915" box="[1130,1182,1715,1740]" pageId="18" pageNumber="563" sensu="stricto">sensu</taxonomicNameLabel>
</taxonomicName>
stricto
</emphasis>
and in
<taxonomicName id="4C3A4D27FF9D2625FACE1CA0FA43F915" authority="Guinot &amp; Ng &amp; Rodríguez Moreno, 2018" authorityName="Guinot &amp; Ng &amp; Rodríguez Moreno" authorityYear="2018" box="[1333,1455,1714,1740]" class="Malacostraca" family="Gecarcinidae" genus="Tuerkayana" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="B94EEAB6FF9D2625FACE1CA0FA43F915" box="[1333,1455,1714,1740]" italics="true" pageId="18" pageNumber="563">Tuerkayana</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A27D57CDFF9D2625FCD61CC0FC9BF935" box="[813,887,1746,1772]" pageId="18" pageNumber="563" rank="genus">n. gen.</taxonomicNameLabel>
(see below and
<tableCitation id="C6B8031FFF9D2625FBD91CC0FB9CF935" box="[1058,1136,1746,1772]" captionStart="TABLE" captionStartId="23.[144,155,218,236]" captionText="TABLE 1. — New nomenclatural terminology proposed for the Gecarcinidae." pageId="18" pageNumber="563">Table 1</tableCitation>
).
</paragraph>
<paragraph id="8B8536A4FF9D2625FCB81CE0FA49F832" blockId="18.[810,1456,1364,2028]" pageId="18" pageNumber="563">
The presence of a pleonal locking mechanism in
<taxonomicName id="4C3A4D27FF9D2625FAB71CE0FA43F8D5" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1356,1455,1778,1804]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="genus">
<emphasis id="B94EEAB6FF9D2625FAB71CE0FA43F8D5" box="[1356,1455,1778,1804]" italics="true" pageId="18" pageNumber="563">Discoplax</emphasis>
</taxonomicName>
was a character overlooked by
<bibRefCitation id="EFAB4B55FF9D2625FB8C1D00FA8CF8F5" author="NG P. K. L. &amp; WANG C. - H. &amp; HO P. - H. &amp; SHIH H. - T." box="[1143,1376,1810,1836]" pageId="18" pageNumber="563" pagination="1 - 86" refId="ref59975" refString="NG P. K. L., WANG C. - H., HO P. - H. &amp; SHIH H. - T. 2001. - Anannotated checklist of brachyuran crabs from Taiwan (Crustacea: Decapoda). National Taiwan Museum Special Publication Series Taipei 11: 1 - 86." type="journal article" year="2001">Ng &amp; Guinot (2001)</bibRefCitation>
,
<bibRefCitation id="EFAB4B55FF9D2625FA951D00FC58F895" author="NG P. K. L. &amp; DAVIE P. J. F." pageId="18" pageNumber="563" pagination="89 - 100" refId="ref59312" refString="NG P. K. L. &amp; DAVIE P. J. F. 2012. - The blue crab of Christmas Island, Discoplax celeste, new species (Crustacea: Decapoda: Brachyura: Gecarcinidae). Raffles Bulletin of Zoology 60 (1): 89 - 100." type="journal article" year="2012">Ng &amp; Davie (2012)</bibRefCitation>
,
<bibRefCitation id="EFAB4B55FF9D2625FC451D20FB82F895" author="NG P. K. L. &amp; SHIH H. - T." box="[958,1134,1841,1868]" pageId="18" pageNumber="563" pagination="109 - 135" refId="ref59569" refString="NG P. K. L. &amp; SHIH H. - T. 2014. - The systematics of the land crabs of the Discoplax hirtipes (Dana, 1851) species-group (Crustacea: Decapoda: Brachyura: Gecarcinidae), with description of a new species from the eastern Indian Ocean. Raffles Bulletin of Zoology Supplement 30: 109 - 135." type="journal article" year="2014">Ng &amp; Shih (2014</bibRefCitation>
, 2015) and subsequent authors. A structure is tangible in
<taxonomicName id="4C3A4D27FF9D2625FBD01D40FB75F8B2" authorityName="A. Milne-Edwards" authorityYear="1867" box="[1067,1177,1873,1899]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="longipes">
<emphasis id="B94EEAB6FF9D2625FBD01D40FB75F8B2" box="[1067,1177,1873,1899]" italics="true" pageId="18" pageNumber="563">D. longipes</emphasis>
</taxonomicName>
(
<figureCitation id="13012A21FF9D2625FB5E1D43FB1EF8B5" box="[1189,1266,1873,1900]" captionStart="FIG" captionStartId="22.[132,143,1894,1912]" captionTargetBox="[237,1384,214,1839]" captionTargetId="figure-233@22.[693,1154,664,1119]" captionTargetPageId="22" captionText="FIG. 5. — Pleon,thoracic sternum and genital region of Gecarcinidae.A, D, G, J, M, thoracic sternum (brushed) with pleon;B, E, H, K, N, thoracic sternum (brushed) without pleon; C, F, I, L, O, genital region with gonopore and penis: A-C, Discoplax longipes A. Milne-Edwards, 1867, ♂ 32.4× 37.2 mm, Loyalty Islands, Lifou, Inegoj Cave, MNHN-IU-2008-11402 (= MNHN-B24815); D-F, Cardisoma guanhumi Latreille in Latreille, Le Peletier, Serville &amp; Guérin, 1828, ♂ 56.5 × 68.0 mm, Antilles, MNHN-IU-2013-14983 (=MNHN-B12270); G-I, Tuerkayana aff. hirtipes (Dana, 1851) n. comb., ♂ 61.0 ×79.0 mm, Loyalty Islands, Lifou Island, We cave, MNHN-IU-2017-8397 (=MNHN-B24811); J-L, Tuerkayana celeste (Ng &amp; Davie, 2012) n. comb., ♂ 44.4 × 52.2 mm, Australia, Christmas Island, ZRC 2012.0171; M-O, T. magnum (Ng &amp; Shih, 2014) n. comb., ♂ 49.0× 58.7 mm, Indonesia, Java, ZRC 2017.0252. Scale bars: 10 mm." figureDoi="http://doi.org/10.5281/zenodo.4336880" httpUri="https://zenodo.org/record/4336880/files/figure.png" pageId="18" pageNumber="563">Fig. 5B</figureCitation>
) and
<taxonomicName id="4C3A4D27FF9D2625FAD01D40FA4AF8B2" authorityName="Ng &amp; Guinot" authorityYear="2001" box="[1323,1446,1873,1899]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="gracilipes">
<emphasis id="B94EEAB6FF9D2625FAD01D40FA4AF8B2" box="[1323,1446,1873,1899]" italics="true" pageId="18" pageNumber="563">D. gracilipes</emphasis>
</taxonomicName>
, i.e., a button close to suture 4/5 and surrounded by dense setae that obscure it (
<bibRefCitation id="EFAB4B55FF9D2625FC291D83FB7EF872" author="KOHNK S. &amp; GORB S. &amp; BRANDIS D." box="[978,1170,1937,1963]" pageId="18" pageNumber="563" pagination="2087 - 2132" refId="ref56245" refString="KOHNK S., GORB S. &amp; BRANDIS D. 2017. - The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda). Journal of Natural History 51 (35 - 36): 2087 - 2132. https: // doi. org / 10.1080 / 00222933.2017.1355076" type="journal article" year="2017">
Köhnk
<emphasis id="B94EEAB6FF9D2625FBD81D80FBBAF872" box="[1059,1110,1937,1963]" italics="true" pageId="18" pageNumber="563">et al.</emphasis>
2017
</bibRefCitation>
: fig. 19a) (to be confirmed in
<taxonomicName id="4C3A4D27FF9D2625FCB01DA0FC28F812" authorityName="Ng &amp; Shih" authorityYear="2015" box="[843,964,1969,1995]" class="Malacostraca" family="Gecarcinidae" genus="Discoplax" kingdom="Animalia" order="Decapoda" pageId="18" pageNumber="563" phylum="Arthropoda" rank="species" species="michalis">
<emphasis id="B94EEAB6FF9D2625FCB01DA0FC28F812" box="[843,964,1969,1995]" italics="true" pageId="18" pageNumber="563">D. michalis</emphasis>
</taxonomicName>
). This dense setal cover on the area probably makes the pleonal locking system non-functional in adults.
</paragraph>
</subSubSection>
</treatment>
</document>