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<document id="705B2ADF0C111EA7FB8E263AD01CDE05" ID-CLB-Dataset="55729" ID-DOI="10.1080/00222933.2020.1763491" ID-GBIF-Dataset="fb05d004-0f2d-44da-b91e-b6e8304ab2a5" ID-ISSN="1464-5262" ID-Zenodo-Dep="4609148" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="felipe" checkinTime="1615924067624" checkinUser="carolina" docAuthor="Naruse, Tohru &amp; Ng, Peter K. L." docDate="2020" docId="B15D87DEFFE1BE6C6EC7F9B30BD49C2F" docLanguage="en" docName="JNATHIST.54.7-8.445-532.pdf" docOrigin="Journal of Natural History (J. Nat. Hist.) 54 (7 - 8)" docSource="http://dx.doi.org/10.1080/00222933.2020.1763491" docStyle="DocumentStyle:485A7191CD41D6261F41521A3380DC73.9:JNatHist.2017-.journal_article.1cover" docStyleId="485A7191CD41D6261F41521A3380DC73" docStyleName="JNatHist.2017-.journal_article.1cover" docStyleVersion="9" docTitle="Circulium Naruse &amp; Ng 2020, gen. nov." docType="treatment" docUuid="A11EA14D-AC01-486F-9C8F-C15B9B0C5BA7" docUuidSource="ZooBank" docVersion="9" lastPageNumber="458" masterDocId="4D64FFA6FFEABE626F33FF9E0F509F28" masterDocTitle="Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart, Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species" masterLastPageNumber="532" masterPageNumber="445" pageNumber="455" updateTime="1698933465109" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
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<mods:title id="6FDF650A839CB798DD7307FAA10BD0A2">Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart, Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species</mods:title>
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<mods:namePart id="8B80650D017638A69338B147B3915DA0">Naruse, Tohru</mods:namePart>
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<mods:date id="731E6BD046A0F7E126959F2A5F446E73">2020</mods:date>
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<subSubSection id="71EE6543FFE1BE696EC7F9B30C60996F" box="[500,816,1581,1607]" pageId="11" pageNumber="455" type="nomenclature">
<paragraph id="394B36C8FFE1BE696EC7F9B30C60996F" blockId="11.[500,816,1581,1607]" box="[500,816,1581,1607]" pageId="11" pageNumber="455">
<heading id="620381A4FFE1BE696EC7F9B30C60996F" box="[500,816,1581,1607]" centered="true" fontSize="11" level="2" pageId="11" pageNumber="455" reason="2">
Genus
<taxonomicName id="FEF44D4BFFE1BE696D75F9B30DEA996F" ID-CoL="84GNG" authority="Naruse &amp; Ng, 2020" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[582,698,1581,1607]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="11" pageNumber="455" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0B80EADAFFE1BE696D75F9B30DEA996F" bold="true" box="[582,698,1581,1607]" italics="true" pageId="11" pageNumber="455">Circulium</emphasis>
</taxonomicName>
<taxonomicNameLabel id="10B357A1FFE1BE696DF1F9B30C60996F" box="[706,816,1581,1607]" pageId="11" pageNumber="455" rank="genus">gen. nov.</taxonomicNameLabel>
</heading>
</paragraph>
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<paragraph id="394B36C8FFE1BE696F93F91A0E6399B6" blockId="11.[160,974,1668,1728]" box="[160,307,1668,1694]" pageId="11" pageNumber="455">
<emphasis id="0B80EADAFFE1BE696F93F91A0E6399B6" bold="true" box="[160,307,1668,1694]" italics="true" pageId="11" pageNumber="455">
<typeStatus id="E64F886AFFE1BE696F93F91A0F8899B6" box="[160,216,1668,1694]" pageId="11" pageNumber="455">Type</typeStatus>
species
</emphasis>
</paragraph>
<paragraph id="394B36C8FFE1BE6E6F93F9390E0F9F80" blockId="11.[160,974,1668,1728]" lastBlockId="12.[160,1155,142,237]" lastPageId="12" lastPageNumber="456" pageId="11" pageNumber="455">
<taxonomicName id="FEF44D4BFFE1BE696F93F9390D5699E8" ID-CoL="7Z29W" authority="Hess, 1865" authorityName="Hess" authorityYear="1865" box="[160,518,1703,1728]" class="Malacostraca" family="Sesarmidae" genus="Sesarma" kingdom="Animalia" order="Decapoda" pageId="11" pageNumber="455" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE1BE696F93F9390ED799E8" box="[160,391,1703,1728]" italics="true" pageId="11" pageNumber="455">Sesarma rotundatum</emphasis>
<bibRefCitation id="5D654B39FFE1BE696EBDF9390D5699E8" author="Hess W" box="[398,518,1703,1728]" pageId="11" pageNumber="455" pagination="127 - 173" refId="ref41950" refString="Hess W. 1865. Beitrage zur Kenntnis der Decapoden-Krebse Ost-Australiens. Arch Naturg. 36: 127 - 173, pls. 1, 2." type="book chapter" year="1865">Hess, 1865</bibRefCitation>
</taxonomicName>
, by present designation. Gender neuter.
<emphasis id="0B80EADAFFE6BE6E6F93FF100E0F9F80" bold="true" box="[160,351,142,168]" italics="true" pageId="12" pageNumber="456">Included species</emphasis>
</paragraph>
<paragraph id="394B36C8FFE6BE6E6F93FF2C0CCE9FC5" blockId="12.[160,1155,142,237]" pageId="12" pageNumber="456">
<taxonomicName id="FEF44D4BFFE6BE6E6F93FF2C0D4B9FE3" ID-CoL="84GRR" authority="(Hess, 1865)" authorityName="Naruse &amp; Ng" authorityYear="2020" baseAuthorityName="Hess" baseAuthorityYear="1865" box="[160,539,178,203]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE6BE6E6F93FF2C0EDF9FE3" box="[160,399,178,203]" italics="true" pageId="12" pageNumber="456">Circulium rotundatum</emphasis>
(
<bibRefCitation id="5D654B39FFE6BE6E6EA8FF2C0D429FE3" author="Hess W" box="[411,530,178,203]" pageId="12" pageNumber="456" pagination="127 - 173" refId="ref41950" refString="Hess W. 1865. Beitrage zur Kenntnis der Decapoden-Krebse Ost-Australiens. Arch Naturg. 36: 127 - 173, pls. 1, 2." type="book chapter" year="1865">Hess, 1865</bibRefCitation>
)
</taxonomicName>
;
<taxonomicName id="FEF44D4BFFE6BE6E6D16FF2C0DA89FE3" ID-CoL="7WTQR" authority="(Ng, 2012)" baseAuthorityName="Ng" baseAuthorityYear="2012" box="[549,760,178,203]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="navus">
<emphasis id="0B80EADAFFE6BE6E6D16FF2C0D2F9FE3" box="[549,639,178,203]" italics="true" pageId="12" pageNumber="456">C. navus</emphasis>
(
<bibRefCitation id="5D654B39FFE6BE6E6DBFFF2C0DBF9FE3" author="Ng PKL" box="[652,751,178,203]" pageId="12" pageNumber="456" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng, 2012</bibRefCitation>
)
</taxonomicName>
;
<taxonomicName id="FEF44D4BFFE6BE6E6C31FF2C0B2F9FE3" ID-CoL="7WTQS" authority="(Nobili, 1899)" baseAuthorityName="Nobili" baseAuthorityYear="1899" box="[770,1151,178,203]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="papuomalesiacum">
<emphasis id="0B80EADAFFE6BE6E6C31FF2C0CB49FE3" box="[770,996,178,203]" italics="true" pageId="12" pageNumber="456">C. papuomalesiacum</emphasis>
(
<bibRefCitation id="5D654B39FFE6BE6E6CC2FF2C0B269FE3" author="Nobili G" box="[1009,1142,178,203]" pageId="12" pageNumber="456" pagination="230 - 282" refId="ref45188" refString="Nobili G. 1899. Contribuzioni alla conoscenza della fauna carcinologica della Papuasia, delle Molluche e dell' Australia. Ann Mus Civ Stor Nat Genova, Ser 2. 20 (40): 230 - 282." type="journal article" year="1899">Nobili, 1899</bibRefCitation>
)
</taxonomicName>
;
<taxonomicName id="FEF44D4BFFE6BE6E6F93FF4A0EA79FC5" ID-CoL="7WTQT" authority="(Ng and Liu, 2003)" baseAuthorityName="Ng and Liu" baseAuthorityYear="2003" box="[160,503,212,237]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="scandens">
<emphasis id="0B80EADAFFE6BE6E6F93FF4A0E709FC5" box="[160,288,212,237]" italics="true" pageId="12" pageNumber="456">C. scandens</emphasis>
(
<bibRefCitation id="5D654B39FFE6BE6E6E1EFF4A0EBE9FC5" author="Ng PKL &amp; Liu HC" box="[301,494,212,237]" pageId="12" pageNumber="456" pagination="601 - 616" refId="ref44745" refString="Ng PKL, Liu HC. 2003. On a new species of tree-climbing crab of the genus Labuanium (Crustacea: Decapoda: Brachyura: Sesarmidae) from Taiwan. Proc Biol Soc Wash. 116 (3): 601 - 616." type="journal article" year="2003">Ng and Liu, 2003</bibRefCitation>
)
</taxonomicName>
; and
<taxonomicName id="FEF44D4BFFE6BE6E6D06FF4A0CCA9FC5" ID-CoL="7WTQY" authority="(Ng and Davie, 2011)" baseAuthorityName="Ng and Davie" baseAuthorityYear="2011" box="[565,922,212,237]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="vitatum">
<emphasis id="0B80EADAFFE6BE6E6D06FF4A0DF49FC5" box="[565,676,212,237]" italics="true" pageId="12" pageNumber="456">C. vitatum</emphasis>
(
<bibRefCitation id="5D654B39FFE6BE6E6D80FF4A0CC19FC5" author="Ng PKL &amp; Davie PJF" box="[691,913,212,237]" pageId="12" pageNumber="456" pagination="35 - 48" refId="ref44547" refString="Ng PKL, Davie PJF. 2011. Labuanium vitatum (Crustacea: Decapoda: Brachyura: Sesarmidae), a new Indo-West Pacific species of arboreal crab. Zootaxa. 2889: 35 - 48. doi: 10.11646 / zootaxa. 2889.1.2" type="journal article" year="2011">Ng and Davie, 2011</bibRefCitation>
)
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="71EE6543FFE6BE6E6F93FEB70B5B9928" pageId="12" pageNumber="456" type="diagnosis">
<paragraph id="394B36C8FFE6BE6E6F93FEB70E449E6B" blockId="12.[159,1156,297,1536]" box="[160,276,297,323]" pageId="12" pageNumber="456">
<emphasis id="0B80EADAFFE6BE6E6F93FEB70E449E6B" bold="true" box="[160,276,297,323]" italics="true" pageId="12" pageNumber="456">Diagnosis</emphasis>
</paragraph>
<paragraph id="394B36C8FFE6BE6E6F93FED20B5B9928" blockId="12.[159,1156,297,1536]" pageId="12" pageNumber="456">
Carapace rounded, as long as or longer than wide; branchial regions laterally inflated, usually with 1 distinct tooth and 1 rudimentary tooth or 2 teeth behind external orbital angle; dorsal surface slightly convex longitudinally, branchial regions inflated, clearly divided from gastric region by deep cervical groove.Front deflexed at anterior margin of postfrontal lobes,distally recurved, directed anteriorly; frontal margin gradually concave medially in dorsal view, overhanging onto antennular septum and fossae. Two pairs of postfrontal lobes present, lateral lobes exceeding mesial lobes anteriorly; anterior edge of lobes lined with granules, far from (
<emphasis id="0B80EADAFFE6BE6E6F94FDA10EBC9D70" box="[167,492,575,600]" italics="true" pageId="12" pageNumber="456">
<taxonomicName id="FEF44D4BFFE6BE6E6F94FDA10E539D70" baseAuthorityName="Ng" baseAuthorityYear="2012" box="[167,259,575,600]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="navus">C. navus</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE6BE6E6E3DFDA10EBC9D70" baseAuthorityName="Nobili" baseAuthorityYear="1899" box="[270,492,575,600]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="papuomalesiacum">C. papuomalesiacum</taxonomicName>
</emphasis>
,
<taxonomicName id="FEF44D4BFFE6BE6E6ECAFDA10D379D70" baseAuthorityName="Ng and Davie" baseAuthorityYear="2011" box="[505,615,575,600]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="vitatum">
<emphasis id="0B80EADAFFE6BE6E6ECAFDA10D379D70" box="[505,615,575,600]" italics="true" pageId="12" pageNumber="456">C. vitatum</emphasis>
</taxonomicName>
) or close to (
<emphasis id="0B80EADAFFE6BE6E6DC9FDA10B589D70" box="[762,1032,575,600]" italics="true" pageId="12" pageNumber="456">
<taxonomicName id="FEF44D4BFFE6BE6E6DC9FDA10CD09D70" box="[762,896,575,600]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="rotundum">C. rotundum</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE6BE6E6CBFFDA10B589D70" baseAuthorityName="Ng and Liu" baseAuthorityYear="2003" box="[908,1032,575,600]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="scandens">C. scandens</taxonomicName>
</emphasis>
) but never reaching frontal margin in dorsal view. Antennular septum relatively narrow, short. Orbit, in dorsal view, wide U-shaped, median part of supraorbital margin horizontal in large individuals; inner orbital tooth short, directed dorsoanteriorly. External orbital angle with 1 longitudinal ridge of granules on ventral surface. Epistome posterior margin with 3 low lobes, lateral lobes terminally directed anteroventrally, median lobe terminally directed anteriorly (
<emphasis id="0B80EADAFFE6BE6E6F94FC910C549C00" box="[167,772,783,808]" italics="true" pageId="12" pageNumber="456">
<taxonomicName id="FEF44D4BFFE6BE6E6F94FC910E519C00" baseAuthorityName="Ng" baseAuthorityYear="2012" box="[167,257,783,808]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="navus">C. navus</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE6BE6E6E39FC910E8C9C00" box="[266,476,783,808]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="papuomalesiacus">C. papuomalesiacus</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE6BE6E6ED5FC910DD09C00" authorityName="Naruse &amp; Ng" authorityYear="2020" baseAuthorityName="Hess" baseAuthorityYear="1865" box="[486,640,783,808]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="rotundatum">C. rotundatum</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE6BE6E6DB9FC910C549C00" baseAuthorityName="Ng and Liu" baseAuthorityYear="2003" box="[650,772,783,808]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="scandens">C. scandens</taxonomicName>
</emphasis>
) or lateral lobes terminally directed ventrally, median lobe terminally directed anteroventrally (
<taxonomicName id="FEF44D4BFFE6BE6E6C22FCAC0C2C9C63" baseAuthorityName="Ng and Davie" baseAuthorityYear="2011" box="[785,892,818,843]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="species" species="vitatum">
<emphasis id="0B80EADAFFE6BE6E6C22FCAC0C2C9C63" box="[785,892,818,843]" italics="true" pageId="12" pageNumber="456">C. vitatum</emphasis>
</taxonomicName>
). Antenna entering orbit through wide gap between inner orbital tooth and front. Mxp3 exopod with distinct flagellum. Chela palm of male (except for very large male) and female with 1 complete row of granules from hinge with carpus to base of inner angle of dactylus, row sometimes interrupted in very large males; outer surface granulated in various ways but without prominent protuberance; inner surface without transverse rows of granules; thick rim extending along the occlusal margin of immovable finger to dactylar articulation on both outer and inner surfaces, thick rims of both outer and inner surfaces not interrupted near dactylar articulation. Upper-inner margin of movable finger of male and female with 1 row of sparse, irregular low granules over most of length, tip of granules weakly corneous. Ambulatory legs (P25) moderately long, dorso-ventrally flattened, moderately wide; distal anterior corner of meri toothed, followed proximally by subdistal tooth; carpi and propodi narrower than respective meri; dactyli very short, shorter than half length of respective propodi. Male thoracic sternum transversely wide; sternite 8 clearly exposed. Male pleon bell shaped; lateral margins of somites 36 forming concavity, telson usually reaching proximal half of bases of cheliped coxae (reaching proximal three-fifths). G1 stout, relatively long, reaching distal end of sternite 6 to midlength of thoracic sternite 5; straight proximally, distally bent laterally, beak-like corneous process narrow. Vulvae opening near thoracic sternal suture 5/6 on distal third of sternite 6, ellipsoidal; raised posterolaterally, lateral to posterior margin rimmed, mesial end of posterior rim produced to wide, short triangular lobe, sternal vulval cover developed from lateral margin, covering almost entire vulva.
</paragraph>
</subSubSection>
<subSubSection id="71EE6543FFE6BE6E6F93F9A50ED79995" pageId="12" pageNumber="456" type="etymology">
<paragraph id="394B36C8FFE6BE6E6F93F9A50E4D997D" blockId="12.[160,1156,1595,1725]" box="[160,285,1595,1621]" pageId="12" pageNumber="456">
<emphasis id="0B80EADAFFE6BE6E6F93F9A50E4D997D" bold="true" box="[160,285,1595,1621]" italics="true" pageId="12" pageNumber="456">Etymology</emphasis>
</paragraph>
<paragraph id="394B36C8FFE6BE6E6F93F9C10ED79995" blockId="12.[160,1156,1595,1725]" pageId="12" pageNumber="456">
The generic name
<taxonomicName id="FEF44D4BFFE6BE6E6EBAF9C10EBF9950" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[393,495,1631,1656]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE6BE6E6EBAF9C10EBF9950" box="[393,495,1631,1656]" italics="true" pageId="12" pageNumber="456">Circulium</emphasis>
</taxonomicName>
is derived from an arbitrary combination of
<emphasis id="0B80EADAFFE6BE6E6B2DF9C10B2E9950" box="[1054,1150,1631,1656]" italics="true" pageId="12" pageNumber="456">circularis</emphasis>
(circular in Latin, alluding the shape of the carapace) and the suffix for the
<taxonomicName id="FEF44D4BFFE6BE6E6CDEF91C0B3999B3" authorityName=", Serene and Soh" authorityYear="1970" box="[1005,1129,1666,1691]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="12" pageNumber="456" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE6BE6E6CDEF91C0B3999B3" box="[1005,1129,1666,1691]" italics="true" pageId="12" pageNumber="456">Labuanium</emphasis>
</taxonomicName>
,
<emphasis id="0B80EADAFFE6BE6E6B48F91C0F9A9995" italics="true" pageId="12" pageNumber="456">- ium</emphasis>
. Gender neuter.
</paragraph>
</subSubSection>
<subSubSection id="71EE6543FFE7BE6F6F93FF100E749953" pageId="13" pageNumber="457" type="discussion">
<paragraph id="394B36C8FFE7BE6F6F93FF100E569F80" blockId="13.[160,1156,142,1659]" box="[160,262,142,168]" pageId="13" pageNumber="457">
<emphasis id="0B80EADAFFE7BE6F6F93FF100E569F80" bold="true" box="[160,262,142,168]" italics="true" pageId="13" pageNumber="457">Remarks</emphasis>
</paragraph>
<paragraph id="394B36C8FFE7BE6F6F93FF2C0E0F9D98" blockId="13.[160,1156,142,1659]" pageId="13" pageNumber="457">
The taxonomy of the
<taxonomicName id="FEF44D4BFFE7BE6F6EA7FF2C0DCB9FE3" authorityName=": Serene and Soh" authorityYear="1970" box="[404,667,178,203]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE7BE6F6EA7FF2C0DCB9FE3" box="[404,667,178,203]" italics="true" pageId="13" pageNumber="457">Labuanium rotundatum</emphasis>
</taxonomicName>
species group has been revised by
<bibRefCitation id="5D654B39FFE7BE6F6B03FF2C0E5F9FC5" author="Ng PKL &amp; Liu HC" pageId="13" pageNumber="457" pagination="601 - 616" refId="ref44745" refString="Ng PKL, Liu HC. 2003. On a new species of tree-climbing crab of the genus Labuanium (Crustacea: Decapoda: Brachyura: Sesarmidae) from Taiwan. Proc Biol Soc Wash. 116 (3): 601 - 616." type="journal article" year="2003">Ng and Liu (2003)</bibRefCitation>
,
<bibRefCitation id="5D654B39FFE7BE6F6E2AFF4A0EAB9FC5" author="Ng PKL &amp; Davie PJF" box="[281,507,212,237]" pageId="13" pageNumber="457" pagination="35 - 48" refId="ref44547" refString="Ng PKL, Davie PJF. 2011. Labuanium vitatum (Crustacea: Decapoda: Brachyura: Sesarmidae), a new Indo-West Pacific species of arboreal crab. Zootaxa. 2889: 35 - 48. doi: 10.11646 / zootaxa. 2889.1.2" type="journal article" year="2011">Ng and Davie (2011)</bibRefCitation>
and
<bibRefCitation id="5D654B39FFE7BE6F6D02FF4A0DCF9FC5" author="Ng PKL" box="[561,671,212,237]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng (2012)</bibRefCitation>
. The type specimen of
<taxonomicName id="FEF44D4BFFE7BE6F6CADFF4A0E469E38" authority="Hess, 1865" authorityName="Hess" authorityYear="1865" class="Malacostraca" family="Sesarmidae" genus="Sesarma" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE7BE6F6CADFF4A0BD39FC5" box="[926,1155,212,237]" italics="true" pageId="13" pageNumber="457">Sesarma rotundatum</emphasis>
<bibRefCitation id="5D654B39FFE7BE6F6F93FF690E469E38" author="Hess W" box="[160,278,247,272]" pageId="13" pageNumber="457" pagination="127 - 173" refId="ref41950" refString="Hess W. 1865. Beitrage zur Kenntnis der Decapoden-Krebse Ost-Australiens. Arch Naturg. 36: 127 - 173, pls. 1, 2." type="book chapter" year="1865">Hess, 1865</bibRefCitation>
</taxonomicName>
, the type species of
<taxonomicName id="FEF44D4BFFE7BE6F6EC7FF690D0A9E38" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[500,602,247,272]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6EC7FF690D0A9E38" box="[500,602,247,272]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
, is not extant (
<bibRefCitation id="5D654B39FFE7BE6F6DC9FF690C089E38" author="Ng PKL" box="[762,856,247,272]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng 2012</bibRefCitation>
, p. 269), and since the type locality of
<emphasis id="0B80EADAFFE7BE6F6E25FE840E669E1B" box="[278,310,282,307]" italics="true" pageId="13" pageNumber="457">Se.</emphasis>
<taxonomicName id="FEF44D4BFFE7BE6F6E0EFE840D799E1B" authority="(Sydney)" baseAuthorityName="Sydney" box="[317,553,282,307]" class="Malacostraca" family="Sesarmidae" genus="Sesarma" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE7BE6F6E0EFE840E909E1B" box="[317,448,282,307]" italics="true" pageId="13" pageNumber="457">rotundatum</emphasis>
(Sydney)
</taxonomicName>
has been questioned (
<bibRefCitation id="5D654B39FFE7BE6F6C1EFE840CB39E1B" author="McCulloch AR" box="[813,995,282,307]" pageId="13" pageNumber="457" pagination="321 - 353" refId="ref43597" refString="McCulloch AR. 1913. Studies in Australian Crustacea. No. 3. Rec Aust Mus. 9: 321 - 353, pls. 10, 11. doi: 10.3853 / j. 0067 - 1975.9.1913.929" type="book chapter" year="1913">McCulloch 1913</bibRefCitation>
, p. 323;
<bibRefCitation id="5D654B39FFE7BE6F6B77FE840F879E7D" author="Davie PJF" pageId="13" pageNumber="457" refId="ref40800" refString="Davie PJF. 2002. Crustacea: Malacostraca. Eucarida (Part 2): Decapoda-Anomura, Brachyura. In: Wells A, Houston WWK, series editors. Zoological Catalogue of Australia. 19.3 B. Melbourne: CSIRO Publications; p. 641." type="journal volume" year="2002">Davie 2002</bibRefCitation>
, p. 221;
<bibRefCitation id="5D654B39FFE7BE6F6E0FFEA20ECE9E7D" author="Ng PKL" box="[316,414,316,341]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng 2012</bibRefCitation>
, p. 268), a
<typeStatus id="E64F886AFFE7BE6F6D12FEA20D2E9E7D" box="[545,638,316,341]" pageId="13" pageNumber="457" type="neotype">neotype</typeStatus>
was selected from
<collectingCountry id="41E37658FFE7BE6F6C51FEA20CF89E7D" box="[866,936,316,341]" name="Tonga" pageId="13" pageNumber="457">Tonga</collectingCountry>
by
<bibRefCitation id="5D654B39FFE7BE6F6CE4FEA20B199E7D" author="Ng PKL" box="[983,1097,316,341]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng (2012)</bibRefCitation>
. This action restricted
<taxonomicName id="FEF44D4BFFE7BE6F6E55FEC10D159E50" box="[358,581,351,376]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="rotundum">
<emphasis id="0B80EADAFFE7BE6F6E55FEC10D159E50" box="[358,581,351,376]" italics="true" pageId="13" pageNumber="457">Circulium rotundum</emphasis>
</taxonomicName>
to the population distributed to the east of the
<collectingCountry id="41E37658FFE7BE6F6F93FE1C0E019EB3" box="[160,337,386,411]" name="Micronesia" pageId="13" pageNumber="457">Caroline Islands</collectingCountry>
and
<collectingCountry id="41E37658FFE7BE6F6EBEFE1C0D199EB3" box="[397,585,386,411]" name="Solomon Islands" pageId="13" pageNumber="457">Solomon Islands</collectingCountry>
, ranging across Pohnpei,
<collectingCountry id="41E37658FFE7BE6F6C5DFE1C0CC09EB3" box="[878,912,386,411]" name="Fiji" pageId="13" pageNumber="457">Fiji</collectingCountry>
,
<collectingCountry id="41E37658FFE7BE6F6CAFFE1C0CBB9EB3" box="[924,1003,386,411]" name="Samoa" pageId="13" pageNumber="457">Samoa</collectingCountry>
,
<collectingCountry id="41E37658FFE7BE6F6CC6FE1C0B6E9EB3" box="[1013,1086,386,411]" name="Tonga" pageId="13" pageNumber="457">Tonga</collectingCountry>
,
<collectingCountry id="41E37658FFE7BE6F6B79FE1C0FBF9E95" name="Cook Islands" pageId="13" pageNumber="457">Cook Islands</collectingCountry>
,
<collectingCountry id="41E37658FFE7BE6F6FCBFE3A0EFA9E95" box="[248,426,420,445]" name="Marshall Islands" pageId="13" pageNumber="457">Marshall Islands</collectingCountry>
, and with doubt from the Hawaiian Islands (
<bibRefCitation id="5D654B39FFE7BE6F6CA3FE3A0B469E95" author="Castro P" box="[912,1046,420,445]" pageId="13" pageNumber="457" pagination="1 - 154" refId="ref40399" refString="Castro P. 2011. Catalog of the anomuran and brachyuran crabs (Crustacea: Decapoda: Anomura, Brachyura) of the Hawaiian Islands. Zootaxa. 2947: 1 - 154. doi: 10.11646 / zootaxa. 2947.1.1" type="journal article" year="2011">Castro 2011</bibRefCitation>
;
<bibRefCitation id="5D654B39FFE7BE6F6B12FE3A0B2E9E95" author="Ng PKL" box="[1057,1150,420,445]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng 2012</bibRefCitation>
, p. 265). Other members of the genus
<taxonomicName id="FEF44D4BFFE7BE6F6D52FE590CFA9EC8" authority="Ng and Liu, 2003" authorityName="Ng and Liu" authorityYear="2003" box="[609,938,455,480]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="scandens">
<emphasis id="0B80EADAFFE7BE6F6D52FE590DB29EC8" box="[609,738,455,480]" italics="true" pageId="13" pageNumber="457">C. scandens</emphasis>
<bibRefCitation id="5D654B39FFE7BE6F6DDAFE590CFA9EC8" author="Ng PKL &amp; Liu HC" box="[745,938,455,480]" pageId="13" pageNumber="457" pagination="601 - 616" refId="ref44745" refString="Ng PKL, Liu HC. 2003. On a new species of tree-climbing crab of the genus Labuanium (Crustacea: Decapoda: Brachyura: Sesarmidae) from Taiwan. Proc Biol Soc Wash. 116 (3): 601 - 616." type="journal article" year="2003">Ng and Liu, 2003</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="FEF44D4BFFE7BE6F6C84FE590E769D2B" authority="Ng and Davie, 2011" authorityName="Ng and Davie" authorityYear="2011" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="vitatum">
<emphasis id="0B80EADAFFE7BE6F6C84FE590B789EC8" box="[951,1064,455,480]" italics="true" pageId="13" pageNumber="457">C. vitatum</emphasis>
<bibRefCitation id="5D654B39FFE7BE6F6B03FE590E769D2B" author="Ng PKL &amp; Davie PJF" pageId="13" pageNumber="457" pagination="35 - 48" refId="ref44547" refString="Ng PKL, Davie PJF. 2011. Labuanium vitatum (Crustacea: Decapoda: Brachyura: Sesarmidae), a new Indo-West Pacific species of arboreal crab. Zootaxa. 2889: 35 - 48. doi: 10.11646 / zootaxa. 2889.1.2" type="journal article" year="2011">Ng and Davie, 2011</bibRefCitation>
</taxonomicName>
and
<taxonomicName id="FEF44D4BFFE7BE6F6E56FE740D669D2B" authority="Ng, 2012" authorityName="Ng" authorityYear="2012" box="[357,566,490,515]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="navus">
<emphasis id="0B80EADAFFE7BE6F6E56FE740E949D2B" box="[357,452,490,515]" italics="true" pageId="13" pageNumber="457">C. navus</emphasis>
<bibRefCitation id="5D654B39FFE7BE6F6EFCFE740D669D2B" author="Ng PKL" box="[463,566,490,515]" pageId="13" pageNumber="457" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng, 2012</bibRefCitation>
</taxonomicName>
were described from
<collectingCountry id="41E37658FFE7BE6F6C62FE740CF39D2B" box="[849,931,490,515]" name="Taiwan" pageId="13" pageNumber="457">Taiwan</collectingCountry>
, the eastern Indian Ocean and
<collectingCountry id="41E37658FFE7BE6F6E10FD920E399D0D" box="[291,361,524,549]" name="Guam" pageId="13" pageNumber="457">Guam</collectingCountry>
, respectively (as
<taxonomicName id="FEF44D4BFFE7BE6F6D1AFD920DF59D0D" authorityName=", Serene and Soh" authorityYear="1970" box="[553,677,524,549]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6D1AFD920DF59D0D" box="[553,677,524,549]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
), whereas
<taxonomicName id="FEF44D4BFFE7BE6F6C2CFD920BD39D0D" authorityName="Hess" authorityYear="1865" box="[799,1155,524,549]" class="Malacostraca" family="Sesarmidae" genus="Sesarma" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="species" species="rotundata" subGenus="Episesarma">
<emphasis id="0B80EADAFFE7BE6F6C2CFD920C2B9D0D" box="[799,891,524,549]" italics="true" pageId="13" pageNumber="457">Sesarma</emphasis>
(
<emphasis id="0B80EADAFFE7BE6F6CBFFD920B569D0D" box="[908,1030,524,549]" italics="true" pageId="13" pageNumber="457">Episesarma</emphasis>
)
<emphasis id="0B80EADAFFE7BE6F6B25FD920BD39D0D" box="[1046,1155,524,549]" italics="true" pageId="13" pageNumber="457">rotundata</emphasis>
</taxonomicName>
var.
<emphasis id="0B80EADAFFE7BE6F6FE0FDB10EDE9D60" box="[211,398,559,584]" italics="true" pageId="13" pageNumber="457">papuo-malesiaca</emphasis>
<bibRefCitation id="5D654B39FFE7BE6F6EABFDB10D729D60" author="Nobili G" box="[408,546,559,584]" pageId="13" pageNumber="457" pagination="230 - 282" refId="ref45188" refString="Nobili G. 1899. Contribuzioni alla conoscenza della fauna carcinologica della Papuasia, delle Molluche e dell' Australia. Ann Mus Civ Stor Nat Genova, Ser 2. 20 (40): 230 - 282." type="journal article" year="1899">Nobili, 1899</bibRefCitation>
, was resurrected by
<bibRefCitation id="5D654B39FFE7BE6F6C2AFDB10B5A9D60" author="Ng PKL &amp; Davie PJF" box="[793,1034,559,584]" pageId="13" pageNumber="457" pagination="35 - 48" refId="ref44547" refString="Ng PKL, Davie PJF. 2011. Labuanium vitatum (Crustacea: Decapoda: Brachyura: Sesarmidae), a new Indo-West Pacific species of arboreal crab. Zootaxa. 2889: 35 - 48. doi: 10.11646 / zootaxa. 2889.1.2" type="journal article" year="2011">Ng and Davie (2011)</bibRefCitation>
as a valid species of
<taxonomicName id="FEF44D4BFFE7BE6F6E16FDCC0EF19D43" authorityName=", Serene and Soh" authorityYear="1970" box="[293,417,594,619]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6E16FDCC0EF19D43" box="[293,417,594,619]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
based on material from Irian Jaya (= Western New
<collectingCountry id="41E37658FFE7BE6F6B1DFDCC0BD09D43" box="[1070,1152,594,619]" name="Guinea-Bissau" pageId="13" pageNumber="457">Guinea</collectingCountry>
,
<collectingCountry id="41E37658FFE7BE6F6F93FDEA0E5E9DA5" box="[160,270,628,653]" name="Indonesia" pageId="13" pageNumber="457">Indonesia</collectingCountry>
) and additional material from the
<collectingCountry id="41E37658FFE7BE6F6DF5FDEA0C2E9DA5" box="[710,894,628,653]" name="Micronesia" pageId="13" pageNumber="457">Caroline Islands</collectingCountry>
and St. Cruz Group,
<collectingCountry id="41E37658FFE7BE6F6F93FD090E0B9D98" box="[160,347,663,688]" name="Solomon Islands" pageId="13" pageNumber="457">Solomon Islands</collectingCountry>
.
</paragraph>
<paragraph id="394B36C8FFE7BE6F6FF3FD240E749953" blockId="13.[160,1156,142,1659]" pageId="13" pageNumber="457">
<taxonomicName id="FEF44D4BFFE7BE6F6FF3FD240E799DFB" authority="Naruse &amp; Ng, 2020" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[192,297,698,723]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0B80EADAFFE7BE6F6FF3FD240E799DFB" box="[192,297,698,723]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
<taxonomicNameLabel id="10B357A1FFE7BE6F6E07FD240EF29DFB" box="[308,418,698,723]" pageId="13" pageNumber="457" rank="genus">gen. nov.</taxonomicNameLabel>
is characterised by its laterally and dorsally inflated branchial regions of the carapace and relatively slender ambulatory legs with more or less parallel margins of the meri and distally narrowed propodi. The genus can be distinguished from
<taxonomicName id="FEF44D4BFFE7BE6F6FD3FCBC0E0E9C13" authorityName=", Serene and Soh" authorityYear="1970" box="[224,350,802,827]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus" sensu="stricto">
<emphasis id="0B80EADAFFE7BE6F6FD3FCBC0E0E9C13" box="[224,350,802,827]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
<taxonomicNameLabel id="10B357A1FFE7BE6F6E54FCBC0ED99C13" box="[359,393,802,827]" pageId="13" pageNumber="457" sensu="stricto">s.s.</taxonomicNameLabel>
by characters of the cephalothorax, male thoracic sternum, male pleon, male chela, ambulatory legs and G1 (
<tableCitation id="74760373FFE7BE6F6D80FCDA0C5A9C75" box="[691,778,836,861]" captionStart="Table 1" captionStartId="5.[133,189,438,461]" captionTargetPageId="5" captionText="Table 1. Diagnostic characters of Labuanium Serène and Soh, 1970, Circulium gen. nov., Shinobium gen. nov. and Scandarma Schubart, Liu and Cuesta, 2003." httpUri="http://table.plazi.org/id/6D8B6640FFEFBE676FB6FE2809C99EE5" pageId="13" pageNumber="457" tableUuid="6D8B6640FFEFBE676FB6FE2809C99EE5">Table 1</tableCitation>
).
<taxonomicName id="FEF44D4BFFE7BE6F6C10FCDA0CDC9C75" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[803,908,836,861]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6C10FCDA0CDC9C75" box="[803,908,836,861]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
has a proportionally wider carapace than
<taxonomicName id="FEF44D4BFFE7BE6F6EBEFCF90D5B9CA8" authorityName=", Serene and Soh" authorityYear="1970" box="[397,523,871,896]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6EBEFCF90D5B9CA8" box="[397,523,871,896]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
; the width-to-length ratio of
<taxonomicName id="FEF44D4BFFE7BE6F6C66FCF90CEE9CA8" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[853,958,871,896]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6C66FCF90CEE9CA8" box="[853,958,871,896]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
species is usually more than 1 (rarely 0.98), whereas that of
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<emphasis id="0B80EADAFFE7BE6F6D4AFC140DB79C8B" box="[633,743,906,931]" italics="true" pageId="13" pageNumber="457">L. politum</emphasis>
</taxonomicName>
is less than 0.91. These proportional differences also appear in the relative length of the male thoracic sternum; the distal end of the male telson just reaches the midlength of sternite
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<taxonomicName id="FEF44D4BFFE7BE6F6CA4FC510B509CC0" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[919,1024,975,1000]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6CA4FC510B509CC0" box="[919,1024,975,1000]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
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, whereas it clearly reaches beyond the midlength in
<taxonomicName id="FEF44D4BFFE7BE6F6D5EFC6C0DBB9B23" authorityName=", Serene and Soh" authorityYear="1970" box="[621,747,1010,1035]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6D5EFC6C0DBB9B23" box="[621,747,1010,1035]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
. The lateral margins of the carapace of
<taxonomicName id="FEF44D4BFFE7BE6F6FF1FB8A0E7B9B05" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[194,299,1044,1069]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6FF1FB8A0E7B9B05" box="[194,299,1044,1069]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
are, overall, distinctly inflated around the branchial regions, so that the general outline of the carapace is somewhat circular in appearance. In contrast, the lateral margins of the carapace of
<taxonomicName id="FEF44D4BFFE7BE6F6D08FBC40DE99B5B" authorityName=", Serene and Soh" authorityYear="1970" box="[571,697,1114,1139]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus" sensu="stricto">
<emphasis id="0B80EADAFFE7BE6F6D08FBC40DE99B5B" box="[571,697,1114,1139]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
<taxonomicNameLabel id="10B357A1FFE7BE6F6DF0FBC40DB59B5B" box="[707,741,1114,1139]" pageId="13" pageNumber="457" sensu="stricto">s.s.</taxonomicNameLabel>
are more sinuous but they appear more or less subparallel. The frontal margin of
<taxonomicName id="FEF44D4BFFE7BE6F6D85FBE20C4F9BBD" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[694,799,1148,1173]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6D85FBE20C4F9BBD" box="[694,799,1148,1173]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
is of the typical sesarmid form, with a slightly recurved entire frontal margin overhanging onto the antennuler fossae and narrow antennular septum. In
<taxonomicName id="FEF44D4BFFE7BE6F6D04FB5C0DE59BF3" authorityName=", Serene and Soh" authorityYear="1970" box="[567,693,1218,1243]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6D04FB5C0DE59BF3" box="[567,693,1218,1243]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
, however, the front is strongly bent for more than 90°, and the frontal margin is widely depressed medially so the margin of the depressed part is attached to the wide antennular septum. There is a thick rim extending along the occlusal margin of the immovable finger to the dactylar articulation on both outer and inner surfaces of the chela.
<taxonomicName id="FEF44D4BFFE7BE6F6DA2FAD20DAA9A4D" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[657,762,1356,1381]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6DA2FAD20DAA9A4D" box="[657,762,1356,1381]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
has a continuous rim throughout, but that of
<taxonomicName id="FEF44D4BFFE7BE6F6E2DFAF10ECC9AA0" authorityName=", Serene and Soh" authorityYear="1970" box="[286,412,1391,1416]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6E2DFAF10ECC9AA0" box="[286,412,1391,1416]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
is interrupted near the dactylar articulation. In addition,
<taxonomicName id="FEF44D4BFFE7BE6F6B28FAF10BD49AA0" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[1051,1156,1391,1416]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6B28FAF10BD49AA0" box="[1051,1156,1391,1416]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
has proportionally more slender ambulatory legs, especially the meri and propodi, compared to
<taxonomicName id="FEF44D4BFFE7BE6F6E73FA2A0EEE9AE5" authorityName=", Serene and Soh" authorityYear="1970" box="[320,446,1460,1485]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6E73FA2A0EEE9AE5" box="[320,446,1460,1485]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
. The male pleon of
<taxonomicName id="FEF44D4BFFE7BE6F6D83FA2A0C499AE5" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[688,793,1460,1485]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6D83FA2A0C499AE5" box="[688,793,1460,1485]" italics="true" pageId="13" pageNumber="457">Circulium</emphasis>
</taxonomicName>
is widest at somite 3 with the lateral margins of somites 3 to 5 strongly converging distally. The male pleon of
<taxonomicName id="FEF44D4BFFE7BE6F6F93FA640E4E993B" authorityName=", Serene and Soh" authorityYear="1970" box="[160,286,1530,1555]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6F93FA640E4E993B" box="[160,286,1530,1555]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
is proportionally much narrower, and while somite 3 is still widest, the lateral margins of somites 35 are only weakly narrowed distally. These differences warrant the recognition of a separate genus for five species heretofore assigned to
<taxonomicName id="FEF44D4BFFE7BE6F6F93F9FC0E4E9953" authorityName=", Serene and Soh" authorityYear="1970" box="[160,286,1634,1659]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="457" phylum="Arthropoda" rank="genus">
<emphasis id="0B80EADAFFE7BE6F6F93F9FC0E4E9953" box="[160,286,1634,1659]" italics="true" pageId="13" pageNumber="457">Labuanium</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="71EE6543FFE4BE6C6F93FF100BD49C2F" pageId="14" pageNumber="458" type="key">
<paragraph id="394B36C8FFE4BE6C6F93FF100D019F8F" blockId="14.[160,593,142,167]" box="[160,593,142,167]" pageId="14" pageNumber="458">
<emphasis id="0B80EADAFFE4BE6C6F93FF100D019F8F" bold="true" box="[160,593,142,167]" pageId="14" pageNumber="458">
Key to species of
<taxonomicName id="FEF44D4BFFE4BE6C6E40FF100EB19F8F" ID-CoL="84GNG" authority="Naruse &amp; Ng, 2020" authorityName="Naruse &amp; Ng" authorityYear="2020" box="[371,481,142,167]" class="Malacostraca" family="Sesarmidae" genus="Circulium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0B80EADAFFE4BE6C6E40FF100EB19F8F" bold="true" box="[371,481,142,167]" italics="true" pageId="14" pageNumber="458">Circulium</emphasis>
</taxonomicName>
<taxonomicNameLabel id="10B357A1FFE4BE6C6EDBFF100D019F8F" box="[488,593,142,167]" pageId="14" pageNumber="458" rank="genus">gen. nov</taxonomicNameLabel>
</emphasis>
</paragraph>
<key id="4D6561F9FFE4BE6C6F93FF4F0BD49C2F" pageId="14" pageNumber="458">
<keyStep id="82002E6DFFE4BE6C6F93FF4F0BD39E24" pageId="14" pageNumber="458">
<paragraph id="394B36C8FFE4BE6C6F93FF4F0BD39FC2" blockId="14.[160,1155,209,268]" box="[160,1155,209,234]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FF4F0BD39FC2" box="[160,1155,209,234]" pageId="14" pageNumber="458">1. Outer surface of male chela with sparsely arranged large granules .................................. 2</keyLead>
</paragraph>
<paragraph id="394B36C8FFE4BE6C6F93FF6D0BD39E24" blockId="14.[160,1155,209,268]" box="[160,1155,243,268]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FF6D0BD39E24" box="[160,1155,243,268]" pageId="14" pageNumber="458"> Outer surface of male chela with closely arranged small granules .................................... 3</keyLead>
</paragraph>
</keyStep>
<keyStep id="82002E6DFFE4BE6C6F93FEB70BD49EE4" pageId="14" pageNumber="458">
<paragraph id="394B36C8FFE4BE6C6F93FEB70BD49EAF" blockId="14.[160,1158,297,460]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FEB70BD49EAF" pageId="14" pageNumber="458">
2. Colouration in life uniformly yellow, with white fingers of chelipeds; G1 relatively more slender, distally bent about 6080° from vertical, distal corneous process longer ................. ...........................................................................................................................
<taxonomicName id="FEF44D4BFFE4BE6C6C65FEF00BD49EAF" ID-CoL="7Z29W" authority="(Hess, 1865)" baseAuthorityName="Hess" baseAuthorityYear="1865" box="[854,1156,366,391]" class="Malacostraca" family="Sesarmidae" genus="Sesarma" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="species" species="rotundatum">
<emphasis id="0B80EADAFFE4BE6C6C65FEF00CA59EAF" box="[854,1013,366,391]" italics="true" pageId="14" pageNumber="458">C. rotundatum</emphasis>
(
<bibRefCitation id="5D654B39FFE4BE6C6B31FEF00B2C9EAF" author="Hess W" box="[1026,1148,366,391]" pageId="14" pageNumber="458" pagination="127 - 173" refId="ref41950" refString="Hess W. 1865. Beitrage zur Kenntnis der Decapoden-Krebse Ost-Australiens. Arch Naturg. 36: 127 - 173, pls. 1, 2." type="book chapter" year="1865">Hess, 1865</bibRefCitation>
)
</taxonomicName>
</keyLead>
</paragraph>
<paragraph id="394B36C8FFE4BE6C6F93FE0F0BD49EE4" blockId="14.[160,1158,297,460]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FE0F0BD49EE4" pageId="14" pageNumber="458">
Colouration in life uniformly greyish-white; G1 relatively stouter, distally bent about 80° from vertical, distal corneous process truncated ........................................
<taxonomicName id="FEF44D4BFFE4BE6C6C9FFE2D0BD49EE4" ID-CoL="7WTQR" authority="(Ng, 2012)" baseAuthorityName="Ng" baseAuthorityYear="2012" box="[940,1156,435,460]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="species" species="navus">
<emphasis id="0B80EADAFFE4BE6C6C9FFE2D0B589EE4" box="[940,1032,435,460]" italics="true" pageId="14" pageNumber="458">C. navus</emphasis>
(
<bibRefCitation id="5D654B39FFE4BE6C6B24FE2D0B2C9EE4" author="Ng PKL" box="[1047,1148,435,460]" pageId="14" pageNumber="458" pagination="265 - 277" refId="ref44332" refString="Ng PKL. 2012. The identity of Sesarma rotundata Hess, 1865, and description of a new species of arboreal crab of the genus Labuanium Serene &amp; Soh, 1970, from Guam, western Pacific (Crustacea: Decapoda: Brachyura: Sesarmidae). Raffles Bull Zool Suppl. 25: 265 - 277." type="journal article" year="2012">Ng, 2012</bibRefCitation>
)
</taxonomicName>
</keyLead>
</paragraph>
</keyStep>
<keyStep id="82002E6DFFE4BE6C6F93FE770BD39D87" pageId="14" pageNumber="458">
<paragraph id="394B36C8FFE4BE6C6F93FE770BD49D6F" blockId="14.[160,1156,489,687]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FE770BD49D6F" pageId="14" pageNumber="458">
3. Upper surface of chelae of large male with interrupted rows of granules; lateral carapace margin of larger adult (e.g.&gt; CW
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) relatively less convex; G1 distally bent about 45° from vertical ......................................................
<taxonomicName id="FEF44D4BFFE4BE6C6C2CFDB00BD49D6F" ID-CoL="7WTQY" authority="(Ng and Davie, 2011)" baseAuthorityName="Ng and Davie" baseAuthorityYear="2011" box="[799,1156,558,583]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="species" species="vitatum">
<emphasis id="0B80EADAFFE4BE6C6C2CFDB00CDF9D6F" box="[799,911,558,583]" italics="true" pageId="14" pageNumber="458">C. vitatum</emphasis>
(
<bibRefCitation id="5D654B39FFE4BE6C6CADFDB00B2C9D6F" author="Ng PKL &amp; Davie PJF" box="[926,1148,558,583]" pageId="14" pageNumber="458" pagination="35 - 48" refId="ref44547" refString="Ng PKL, Davie PJF. 2011. Labuanium vitatum (Crustacea: Decapoda: Brachyura: Sesarmidae), a new Indo-West Pacific species of arboreal crab. Zootaxa. 2889: 35 - 48. doi: 10.11646 / zootaxa. 2889.1.2" type="journal article" year="2011">Ng and Davie, 2011</bibRefCitation>
)
</taxonomicName>
</keyLead>
</paragraph>
<paragraph id="394B36C8FFE4BE6C6F93FDCF0BD39D87" blockId="14.[160,1156,489,687]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FDCF0BD39D87" pageId="14" pageNumber="458">
Upper surface of chelae of large male with a complete traversing row of granules; lateral carapace margin of larger adult (e.g.&gt; CW
<quantity id="FE0C9B2DFFE4BE6C6DDFFDED0C6F9DA4" box="[748,831,627,652]" metricMagnitude="-2" metricUnit="m" metricValue="3.4" pageId="14" pageNumber="458" unit="mm" value="34.0">34 mm</quantity>
) relatively more convex; G1 distally bent 60° or more from vertical ............................................................................................... 4
</keyLead>
</paragraph>
</keyStep>
<keyStep id="82002E6DFFE4BE6C6F93FD550BD49C2F" pageId="14" pageNumber="458">
<paragraph id="394B36C8FFE4BE6C6F93FD550BD49DCC" blockId="14.[160,1156,715,775]" box="[160,1156,715,740]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FD550BD49DCC" box="[160,1156,715,740]" pageId="14" pageNumber="458">
4. G1 distally bent almost 90° from vertical.............. ..............
<taxonomicName id="FEF44D4BFFE4BE6C6C1DFD550BD49DCC" ID-CoL="7WTQT" authority="(Ng and Liu, 2003)" baseAuthorityName="Ng and Liu" baseAuthorityYear="2003" box="[814,1156,715,740]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="species" species="scandens">
<emphasis id="0B80EADAFFE4BE6C6C1DFD550CFE9DCC" box="[814,942,715,740]" italics="true" pageId="14" pageNumber="458">C. scandens</emphasis>
(
<bibRefCitation id="5D654B39FFE4BE6C6C88FD550B2C9DCC" author="Ng PKL &amp; Liu HC" box="[955,1148,715,740]" pageId="14" pageNumber="458" pagination="601 - 616" refId="ref44745" refString="Ng PKL, Liu HC. 2003. On a new species of tree-climbing crab of the genus Labuanium (Crustacea: Decapoda: Brachyura: Sesarmidae) from Taiwan. Proc Biol Soc Wash. 116 (3): 601 - 616." type="journal article" year="2003">Ng and Liu, 2003</bibRefCitation>
)
</taxonomicName>
</keyLead>
</paragraph>
<paragraph id="394B36C8FFE4BE6C6F93FD700BD49C2F" blockId="14.[160,1156,715,775]" box="[160,1156,750,775]" pageId="14" pageNumber="458">
<keyLead id="820595FDFFE4BE6C6F93FD700BD49C2F" box="[160,1156,750,775]" pageId="14" pageNumber="458">
G1 distally bent almost 60° from vertical ....................
<taxonomicName id="FEF44D4BFFE4BE6C6C31FD700BD49C2F" ID-CoL="7WTQS" authority="(Nobili, 1899)" baseAuthorityName="Nobili" baseAuthorityYear="1899" box="[770,1156,750,775]" class="Malacostraca" family="Sesarmidae" genus="Labuanium" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="458" phylum="Arthropoda" rank="species" species="papuomalesiacum">
<emphasis id="0B80EADAFFE4BE6C6C31FD700CB69C2F" box="[770,998,750,775]" italics="true" pageId="14" pageNumber="458">C. papuomalesiacum</emphasis>
(
<bibRefCitation id="5D654B39FFE4BE6C6CC6FD700B2C9C2F" author="Nobili G" box="[1013,1148,750,775]" pageId="14" pageNumber="458" pagination="230 - 282" refId="ref45188" refString="Nobili G. 1899. Contribuzioni alla conoscenza della fauna carcinologica della Papuasia, delle Molluche e dell' Australia. Ann Mus Civ Stor Nat Genova, Ser 2. 20 (40): 230 - 282." type="journal article" year="1899">Nobili, 1899</bibRefCitation>
)
</taxonomicName>
</keyLead>
</paragraph>
</keyStep>
</key>
</subSubSection>
</treatment>
</document>