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161 lines
15 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.760.24787" ID-GBIF-Dataset="3dbd2dbc-8919-4914-b744-57857f5b4554" ID-PMC="PMC5986825" ID-Pensoft-Pub="1313-2970-760-89" ID-PubMed="29872365" ID-ZBK="A93EB14C1AD140AD8E8284C040350651" ModsDocAuthor="" ModsDocDate="2018" ModsDocID="1313-2970-760-89" ModsDocOrigin="ZooKeys 760" ModsDocTitle="The freshwater crabs of Danum Valley Conservation Area in Sabah, East Malaysia, with a description of a new species of Thelphusula Bott, 1969 (Crustacea, Brachyura, Gecarcinucidae, Potamidae, Sesarmidae)" checkinTime="1527525286737" checkinUser="pensoft" docAuthor="Ng, Peter K. L. & Ng, Paul Y. C." docDate="2018" docId="50DE103300730BFE71D77ADE0F070406" docLanguage="en" docName="ZooKeys 760: 89-112" docOrigin="ZooKeys 760" docSource="http://dx.doi.org/10.3897/zookeys.760.24787" docTitle="Geosesarma danumense Ng 2002" docType="treatment" docVersion="4" lastPageNumber="89" masterDocId="FFA25143614AFFEBFF8CFF92EF2F5E49" masterDocTitle="The freshwater crabs of Danum Valley Conservation Area in Sabah, East Malaysia, with a description of a new species of Thelphusula Bott, 1969 (Crustacea, Brachyura, Gecarcinucidae, Potamidae, Sesarmidae)" masterLastPageNumber="112" masterPageNumber="89" pageNumber="89" updateTime="1668165827065" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>The freshwater crabs of Danum Valley Conservation Area in Sabah, East Malaysia, with a description of a new species of Thelphusula Bott, 1969 (Crustacea, Brachyura, Gecarcinucidae, Potamidae, Sesarmidae)</mods:title>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Ng, Peter K. L.</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Ng, Paul Y. C.</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2018</mods:date>
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<mods:detail type="volume">
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<mods:number>760</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>89</mods:start>
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<mods:end>112</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.760.24787</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.760.24787</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-760-89</mods:identifier>
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<mods:identifier type="ZBK">A93EB14C1AD140AD8E8284C040350651</mods:identifier>
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<mods:identifier type="ZooBank">A93EB14C1AD140AD8E8284C040350651</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="144148299" LSID="urn:lsid:plazi:treatment:50DE103300730BFE71D77ADE0F070406" httpUri="http://treatment.plazi.org/id/50DE103300730BFE71D77ADE0F070406" lastPageNumber="89" pageId="0" pageNumber="89">
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<subSubSection pageId="0" pageNumber="89" type="nomenclature">
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<paragraph pageId="0" pageNumber="89">
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<taxonomicName authority="Ng, 2002" authorityName="Ng" authorityYear="2002" class="Malacostraca" family="Gecarcinucidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma danumense" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="danumense">Geosesarma danumense Ng, 2002</taxonomicName>
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Figure 7
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="89" type="reference_group">
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<paragraph pageId="0" pageNumber="89">
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<taxonomicName class="Malacostraca" family="Gecarcinucidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma danumense" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="danumense">Geosesarma danumense</taxonomicName>
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Ng, 2002: 303, figs 1-3;
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Raffles Bulletin of Zoology Supplement" pageId="0" pageNumber="89" pagination="1 - 286" title="Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world." volume="17" year="2008">Ng et al. 2008</bibRefCitation>
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: 220.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="89" type="materials_examined">
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<paragraph pageId="0" pageNumber="89">Material examined.</paragraph>
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<paragraph pageId="0" pageNumber="89">
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Holotype: male (14.8
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<normalizedToken originalValue="×">x</normalizedToken>
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14.6 mm) (ZRC 2017.1298), in pitfall trap, primary forest, Danum Valley Field Centre, Sabah, Malaysia, coll. C.
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<normalizedToken originalValue="Colón">Colon</normalizedToken>
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, 22 November 1996. Others: 1 ovigerous female (14.9
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<normalizedToken originalValue="×">x</normalizedToken>
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15. mm) (ZRC 2017.1273), in water filled rotting log, Nature Trail, Danum Valley Field Centre, Sabah, Borneo, coll. local rangers, 21 July 2017.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="89" type="materials_examined">
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<paragraph pageId="0" pageNumber="89">Comparative material.</paragraph>
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<paragraph pageId="0" pageNumber="89">
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma sabanum" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="sabanum">Geosesarma sabanum</taxonomicName>
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Ng, 1992: holotype male (13.1
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<normalizedToken originalValue="×">x</normalizedToken>
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13.6 mm) (ZRC 2018.0296), on leaf of herb in forest, ca. 50 m from nearest stream, Tawau Hills Park, eastern Sabah, Malaysia, Borneo, coll. R.F. Inger, 3 November 1991.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="89" type="colour">
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<paragraph pageId="0" pageNumber="89">Colour.</paragraph>
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<paragraph pageId="0" pageNumber="89">
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma danumense" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="danumense">Geosesarma danumense</taxonomicName>
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has a dark yellow to orange carapace, purple ambulatory legs with scattered white specks, orange merus and carpus of the chelipeds, with the palm and fingers white (Fig. 7
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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). The eggs of the recently collected ovigerous female were observed to be a bright reddish orange in colour and large in size, indicating that the development is probably direct (see
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<bibRefCitation author="Soh, CL" journalOrPublisher="Journal of Zoology" pageId="0" pageNumber="89" pagination="357 - 370" title="Abbreviated development of a non-marine crab, Sesarma (Geosesarma) perracae (Brachyura; Grapsidae) from Singapore." volume="158" year="1969">Soh 1969</bibRefCitation>
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;
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Crustaceana" pageId="0" pageNumber="89" pagination="390 - 395" title="Geosesarmanotophorum sp. nov. (Decapoda, Brachyura, Grapsidae, Sesarminae), a terrestrial crab from Sumatra, with novel brooding behaviour." url="https://doi.org/10.1163/156854095X00557" volume="68" year="1995">Ng and Tan 1995</bibRefCitation>
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). The live coloration is very similar to the related
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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Ng, 1992 from Tawau (Fig. 7D).
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</paragraph>
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<caption pageId="0" pageNumber="89">
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<paragraph pageId="0" pageNumber="89">
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Figure 7. A
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma danumense" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="danumense">Geosesarma danumense</taxonomicName>
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, ovigerous female (14.9
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<normalizedToken originalValue="×">x</normalizedToken>
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15.1 mm) (ZRC 2017.1273) B, C
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<taxonomicName lsidName="G. danumense" pageId="0" pageNumber="89" rank="species" species="danumense">G. danumense</taxonomicName>
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, male (carapace width ca. 1.5-2.0 cm), on log approx. 30 cm from ground, ca. 30 m from river flowing through Danum Valley Field Centre, 10 pm, 25 July 2013, specimen not collected (photographs: Marcus Ng) D
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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, male, on leaf above ground, Tawau Hills National Park, specimen not collected (photograph Ying Seawei).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="89" type="remarks">
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<paragraph pageId="0" pageNumber="89">Remarks.</paragraph>
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<paragraph pageId="0" pageNumber="89">
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma danumense" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="species" species="danumense">Geosesarma danumense</taxonomicName>
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and
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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are morphologically close, although the external orbital tooth of the latter species is proportionately more slender, the frontal margin less truncate, the ambulatory meri proportionately shorter, and most significantly the corneous distal part of the G1 is proportionately longer (see
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Malayan Nature Journal" pageId="0" pageNumber="89" pagination="303 - 310" title="On a new species of terrestrial crab of the genus Geosesarma (Crustacea: Brachyura: Sesarmidae) from Sabah, Malaysia." volume="56" year="2002">Ng 2002</bibRefCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="89">
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The holotype of
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<taxonomicName lsidName="G. danumense" pageId="0" pageNumber="89" rank="species" species="danumense">G. danumense</taxonomicName>
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was obtained from a pitfall trap while the recent large ovigerous female (ZRC 2017.1273) was collected from under a rotting log. Specimens have also been observed climbing small shrubs. In this respect, it probably has similar habits to
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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from Tawau which has been observed by the second author to hide between the leaves of
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<taxonomicName class="Liliopsida" family="Pandanaceae" genus="Pandanus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Pandanus" order="Pandanales" pageId="0" pageNumber="89" phylum="Tracheophyta" rank="genus">Pandanus</taxonomicName>
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sp. during the day, emerging only at night to forage on low lying vegetation and occasionally amongst leaf litter (unpublished data). The terrestrial habits of
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<taxonomicName lsidName="G. danumense" pageId="0" pageNumber="89" rank="species" species="danumense">G. danumense</taxonomicName>
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and
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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probably parallel those known for species in Peninsular Malaysia and Indonesian Kalimantan (
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="89" pagination="37 - 56" title="Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species." url="https://doi.org/10.11646/zootaxa.4048.1.2" volume="4048" year="2015">Ng 2015</bibRefCitation>
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,
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="89" pagination="226 - 242" title="On the identities of the highland vampire crabs, Geosesarmafoxi (Kemp, 1918) and G. serenei Ng, 1986, with description of a new phytotelmic species from Penang, Peninsular Malaysia (Crustacea: Decapoda: Brachyura: Sesarmidae)." volume="65" year="2017">2017</bibRefCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="89">
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<bibRefCitation author="Manuel-Santos, M" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="89" pagination="335 - 342" title="Two new species of Geosesarma De Man, 1892 (Crustacea: Brachyura: Sesarmidae) from Palawan, the Philippines." volume="64" year="2016">Manuel-Santos et al. (2016</bibRefCitation>
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: 336) commented that the three species of
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma" order="Decapoda" pageId="0" pageNumber="89" phylum="Arthropoda" rank="genus">Geosesarma</taxonomicName>
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on Palawan Island in the Philippines,
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<taxonomicName lsidName="G. lawrencei" pageId="0" pageNumber="89" rank="species" species="lawrencei">G. lawrencei</taxonomicName>
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Manuel-Santos & Yeo, 2007,
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<taxonomicName lsidName="G. batak" pageId="0" pageNumber="89" rank="species" species="batak">G. batak</taxonomicName>
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Manuel-Santos, Ng & Freitag, 2016, and
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<taxonomicName lsidName="G. tagbanuana" pageId="0" pageNumber="89" rank="species" species="tagbanuana">G. tagbanuana</taxonomicName>
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Manuel-Santos, Ng & Freitag, 2016, are morphologically very similar to the Sabahan
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<taxonomicName lsidName="G. danumense" pageId="0" pageNumber="89" rank="species" species="danumense">G. danumense</taxonomicName>
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and
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<taxonomicName lsidName="G. sabanum" pageId="0" pageNumber="89" rank="species" species="sabanum">G. sabanum</taxonomicName>
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, notably in their relative large adult size and long slender ambulatory legs. Their G1 structures, however, are very different, with those of the latter two species proportionately much shorter and stouter (cf.
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Crustaceana" pageId="0" pageNumber="89" pagination="210 - 213" title="Geosesarmasabanus, a new sesarmine crab (Decapoda, Brachyura, Grapsidae) from the forests of Sabah, East Malaysia, Borneo." url="https://doi.org/10.1163/156854092X00596" volume="63" year="1992">Ng 1992</bibRefCitation>
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,
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<bibRefCitation author="Ng, PKL" journalOrPublisher="Malayan Nature Journal" pageId="0" pageNumber="89" pagination="303 - 310" title="On a new species of terrestrial crab of the genus Geosesarma (Crustacea: Brachyura: Sesarmidae) from Sabah, Malaysia." volume="56" year="2002">2002</bibRefCitation>
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;
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<bibRefCitation pageId="0" pageNumber="89">Manuel-Santos and Yeo 2007</bibRefCitation>
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;
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<bibRefCitation author="Manuel-Santos, M" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="89" pagination="335 - 342" title="Two new species of Geosesarma De Man, 1892 (Crustacea: Brachyura: Sesarmidae) from Palawan, the Philippines." volume="64" year="2016">Manuel-Santos et al. 2016</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |