486 lines
48 KiB
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486 lines
48 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.858.35198" ID-GBIF-Dataset="ded4c374-f3a3-4ac4-a174-c103dd827dc9" ID-PMC="PMC6614171" ID-Pensoft-Pub="1313-2970-858-1" ID-PubMed="31312087" ID-ZooBank="88BC2F37ABAE48378C2AC3D964B3E963" ModsDocID="1313-2970-858-1" checkinTime="1565091178235" checkinUser="pensoft" docAuthor="Shy, Jhy-Yun & Ng, Peter K. L." docDate="2019" docId="9014F97294E8694599653FD34D1E8104" docLanguage="en" docName="ZooKeys 858: 1-10" docOrigin="ZooKeys 858" docSource="http://dx.doi.org/10.3897/zookeys.858.35198" docTitle="Geosesarma mirum Shy & Ng, 2019, sp. nov." docType="treatment" docUuid="60FAAFB1-8BC8-416C-AF80-295A6EEA45D0" docUuidSource="ZooBank" docVersion="6" lastPageNumber="1" masterDocId="2D42C379FF9DFFFFFFE5583E6318FFC1" masterDocTitle="Geosesarma mirum, a new species of semi-terrestrial sesarmid crab (Crustacea, Decapoda, Brachyura) from central Taiwan" masterLastPageNumber="10" masterPageNumber="1" pageNumber="1" updateTime="1668167442569" 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>Geosesarma mirum, a new species of semi-terrestrial sesarmid crab (Crustacea, Decapoda, Brachyura) from central Taiwan</mods:title>
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</mods:titleInfo>
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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>Shy, Jhy-Yun</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, Peter K. L.</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>2019</mods:date>
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<mods:detail type="volume">
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<mods:number>858</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>10</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.858.35198</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.858.35198</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-858-1</mods:identifier>
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<mods:identifier type="ZooBank">88BC2F37ABAE48378C2AC3D964B3E963</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="158491563" LSID="urn:lsid:zoobank.org:act:60FAAFB1-8BC8-416C-AF80-295A6EEA45D0" httpUri="http://treatment.plazi.org/id/9014F97294E8694599653FD34D1E8104" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="9014F97294E8694599653FD34D1E8104" class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">Geosesarma mirum</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Geosesarma mirum sp. nov. A, B male (9.9 x 8.6 mm) (NTOU F 10396) C ovigerous female with eggs (specimen not collected) D brooding female with young crabs (specimen not collected). Photographs A-C J-Y Shy, D Peter Wang." figureDoi="10.3897/zookeys.858.35198.figure1" httpUri="https://binary.pensoft.net/fig/314508" pageId="0" pageNumber="1">Figures 1</figureCitation>
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,
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">2</figureCitation>
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,
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan. Right chela A outer view B outer view of dactylus C dorsolateral view D frontolateral view showing crest on inner surface E-G different views of inner surface." figureDoi="10.3897/zookeys.858.35198.figure3" httpUri="https://binary.pensoft.net/fig/314510" pageId="0" pageNumber="1">3</figureCitation>
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,
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">4</figureCitation>
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,
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<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Geosesarma mirum sp. nov. paratype female (10.6 x 9.2 mm) (ZRC 2019.0513), Taiwan A overall dorsal view B anterior thoracic sternum and pleon C sternopleonal cavity and vulvae." figureDoi="10.3897/zookeys.858.35198.figure5" httpUri="https://binary.pensoft.net/fig/314512" pageId="0" pageNumber="1">5</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Material examined.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Holotype: TAIWAN - male (11.9 x 10.8 mm); Chiayi County, Jhongpu, Lunziding Canal;
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<geoCoordinate degrees="23.44914" direction="north" orientation="latitude" precision="1" value="23.44914">23.44914N</geoCoordinate>
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<geoCoordinate degrees="120.48227" direction="east" orientation="longitude" precision="1" value="120.48227">120.48227E</geoCoordinate>
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; 28 Jan. 2019, leg. J.-Y. Shy; under rocks near stream; NTOU F10395. Paratypes: TAIWAN - 3 males (11.5 x 10.3 mm, 10.1
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<normalizedToken originalValue="×">x</normalizedToken>
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8.9 mm, 9.9
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<normalizedToken originalValue="×">x</normalizedToken>
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8.7 mm), 5 females (12.2
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<normalizedToken originalValue="×">x</normalizedToken>
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10.1 mm, 10.6
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<normalizedToken originalValue="×">x</normalizedToken>
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9.2 mm, 9.9
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<normalizedToken originalValue="×">x</normalizedToken>
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8.9 mm, 9.1
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<normalizedToken originalValue="×">x</normalizedToken>
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7.7 mm, 7.9
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<normalizedToken originalValue="×">x</normalizedToken>
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7.2 mm), 1 juvenile female (6.6
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<normalizedToken originalValue="×">x</normalizedToken>
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5.7 mm); same data as holotype; ZRC 2019.0513. 2 males (9.9
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<normalizedToken originalValue="×">x</normalizedToken>
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8.6 mm, 8.4
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<normalizedToken originalValue="×">x</normalizedToken>
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7.3 mm); Chiayi County, Jhongpu, Chilan River;
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<geoCoordinate degrees="23.43744" direction="north" orientation="latitude" precision="1" value="23.43744">23.43744N</geoCoordinate>
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<geoCoordinate degrees="120.48917" direction="east" orientation="longitude" precision="1" value="120.48917">120.48917E</geoCoordinate>
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; 21 Febr. 2019, leg. J.-Y. Shy; NTOU F10396. 1 male (11.5 x 9.8 mm); Chiayi County, Jhongpu, branch of Chilan River; ca.
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<geoCoordinate degrees="23.43744" direction="north" orientation="latitude" precision="1" value="23.43744">23.43744N</geoCoordinate>
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<geoCoordinate degrees="120.48917" direction="east" orientation="longitude" precision="1" value="120.48917">120.48917E</geoCoordinate>
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; 22 March 2019; leg. J.-Y. Shy; NTOU F10397. 7 males (7.8 x 6.5 mm - 12.2 x 11.2 mm), 5 females (9.3 x 7.8 mm - 11.4 x 10.0 mm), same locality as holotype; 23 March 2019; leg. J.-Y. Shy & H.-T. Lai; ZRC 2019.0514.
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</paragraph>
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<caption doi="10.3897/zookeys.858.35198.figure1" httpUri="https://binary.pensoft.net/fig/314508" pageId="0" pageNumber="1" start="Figure 1" startId="F1">
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<paragraph pageId="0" pageNumber="1">
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Figure 1.
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
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<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
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</taxonomicName>
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sp. nov.
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<emphasis bold="true" pageId="0" pageNumber="1">A, B</emphasis>
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male (9.9
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<normalizedToken originalValue="×">x</normalizedToken>
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8.6 mm) (NTOU F10396)
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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ovigerous female with eggs (specimen not collected)
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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brooding female with young crabs (specimen not collected). Photographs
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<emphasis bold="true" pageId="0" pageNumber="1">
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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</emphasis>
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J-Y Shy,
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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Peter Wang.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="diagnosis">
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<paragraph pageId="0" pageNumber="1">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Carapace quadrate, slightly wider than long or subequal, adult width to length ratio 1.10-1.21, lateral margins gently sinuous, gently diverging posteriorly (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">Fig. 2A, B</figureCitation>
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); dorsal surface with regions visible, anterior regions with small rounded granules on gastric regions, branchial regions with numerous striae (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">Fig. 2A, B</figureCitation>
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); front distinctly deflexed, frontal lobes broad, with subtruncate margins in dorsal view; postfrontal, postorbital cristae prominent, rugose (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">
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Fig. 2
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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</figureCitation>
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); external orbital tooth triangular to subtruncate, directed obliquely laterally, outer margin convex, shorter than inner margin, tip reaching lateral margin; second lateral tooth low, rounded, separated from external orbital tooth by deep notch (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">Fig. 2A, B</figureCitation>
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). Merus of third maxilliped subovate, subequal to ischium; exopod slender, reaching to just before edge of merus, with long flagellum (
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">Fig. 4A</figureCitation>
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). Merus of cheliped with low ventral lobe with serrated margin, upper lobe relatively lower. Outer surface of palm of adult male covered with small rounded granules and striae; inner surface granulated, with distinct, high transverse granulated ridge; dorsal margin of dactylus with 11 or 12 low, non-chitinous tubercles on proximal two-thirds (
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan. Right chela A outer view B outer view of dactylus C dorsolateral view D frontolateral view showing crest on inner surface E-G different views of inner surface." figureDoi="10.3897/zookeys.858.35198.figure3" httpUri="https://binary.pensoft.net/fig/314510" pageId="0" pageNumber="1">Fig. 3</figureCitation>
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). Ambulatory legs with relatively stout, short merus, with sharp subdistal spine on dorsal margin, surfaces rugose (
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<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Geosesarma mirum sp. nov. A, B male (9.9 x 8.6 mm) (NTOU F 10396) C ovigerous female with eggs (specimen not collected) D brooding female with young crabs (specimen not collected). Photographs A-C J-Y Shy, D Peter Wang." figureDoi="10.3897/zookeys.858.35198.figure1" httpUri="https://binary.pensoft.net/fig/314508" pageId="0" pageNumber="1">Fig. 1A</figureCitation>
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). Part of male thoracic sternite 8 exposed when pleon closed. Male pleonal locking mechanism formed by expanded posterior edge of thoracic sternite 4. Male pleon triangular; somite 6 wide, with convex lateral margins; telson triangular, not recessed into distal margin of somite 6, margins convex (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A overall dorsal view B dorsal view of carapace C frontal view of cephalothorax D anterior thoracic sternum and pleon." figureDoi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1">Figs 2D</figureCitation>
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,
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">4B</figureCitation>
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). G1 relatively long, stout, gently curved outwards; outer margin of subdistal part of subterminal segment with subangular shelf-like structure (
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">Fig. 4C, D</figureCitation>
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), distal chitinous part broad, tip spatuliform, margin uneven (
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">
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Fig. 4
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<normalizedToken originalValue="C–K">C-K</normalizedToken>
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</figureCitation>
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). G2 short, ca. a third length of G1 (
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Geosesarma mirum sp. nov. holotype male (11.9 x 10.8 mm) (NTOU F 10395), Taiwan A left third maxilliped B pleon C, D different views of ventral surface of left G 1 E dorsal surface of left G 1 F-H different views of ventral surface of distal part of eft G 1 I mesial view of distal part of left G 1 J, K different views of dorsal surface of distal part of left G 1 L left G 2. Scale bars: 0.5 mm (A, C, D, L); 1.0 mm (B); 0.2 mm (F-K)." figureDoi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1">Fig. 4L</figureCitation>
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).
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</paragraph>
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<caption doi="10.3897/zookeys.858.35198.figure2" httpUri="https://binary.pensoft.net/fig/314509" pageId="0" pageNumber="1" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="1">
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Figure 2.
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
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<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
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</taxonomicName>
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sp. nov. holotype male (11.9
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<normalizedToken originalValue="×">x</normalizedToken>
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10.8 mm) (NTOU F10395), Taiwan
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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overall dorsal view
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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dorsal view of carapace
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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frontal view of cephalothorax
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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anterior thoracic sternum and pleon.
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</paragraph>
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</caption>
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<caption doi="10.3897/zookeys.858.35198.figure3" httpUri="https://binary.pensoft.net/fig/314510" pageId="0" pageNumber="1" start="Figure 3" startId="F3">
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<paragraph pageId="0" pageNumber="1">
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Figure 3.
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<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
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<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
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</taxonomicName>
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sp. nov. holotype male (11.9
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<normalizedToken originalValue="×">x</normalizedToken>
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10.8 mm) (NTOU F10395), Taiwan. Right chela
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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outer view
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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outer view of dactylus
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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dorsolateral view
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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frontolateral view showing crest on inner surface
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<emphasis bold="true" pageId="0" pageNumber="1">
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<normalizedToken originalValue="E–G">E-G</normalizedToken>
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</emphasis>
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different views of inner surface.
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</paragraph>
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</caption>
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<caption doi="10.3897/zookeys.858.35198.figure4" httpUri="https://binary.pensoft.net/fig/314511" pageId="0" pageNumber="1" start="Figure 4" startId="F4">
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<paragraph pageId="0" pageNumber="1">
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Figure 4.
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. holotype male (11.9
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
10.8 mm) (NTOU F10395), Taiwan
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
|
||
left third maxilliped
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
pleon
|
||
<emphasis bold="true" pageId="0" pageNumber="1">C, D</emphasis>
|
||
different views of ventral surface of left G1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
|
||
dorsal surface of left G1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">
|
||
<normalizedToken originalValue="F–H">F-H</normalizedToken>
|
||
</emphasis>
|
||
different views of ventral surface of distal part of eft G1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">I</emphasis>
|
||
mesial view of distal part of left G1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">J, K</emphasis>
|
||
different views of dorsal surface of distal part of left G1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">L</emphasis>
|
||
left G2. Scale bars: 0.5 mm (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A, C, D, L</emphasis>
|
||
); 1.0 mm (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
); 0.2 mm (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">
|
||
<normalizedToken originalValue="F–K">F-K</normalizedToken>
|
||
</emphasis>
|
||
).
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="etymology">
|
||
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The name is derived from the Latin for
|
||
<normalizedToken originalValue="“surprise”">"surprise"</normalizedToken>
|
||
, alluding to the unexpected discovery of this species in Taiwan.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="remarks">
|
||
<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. belongs to the group of species which have large eggs (ca. 1.0 mm or greater in diameter, measured in situ), the carapace is trapezoidal to subquadrate, the ambulatory meri are relatively short and stout, the exopod of the third maxilliped has a long flagellum, the inner surface of the male chela has a strong granulated transverse ridge and the G1 is relatively stout with the distal chitinised part spatuliform. The species in this group are:
|
||
<taxonomicName lsidName="G. amphinome" pageId="0" pageNumber="1" rank="species" species="amphinome">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. amphinome</emphasis>
|
||
</taxonomicName>
|
||
(De Man, 1899) [western Borneo],
|
||
<taxonomicName lsidName="G. peraccae" pageId="0" pageNumber="1" rank="species" species="peraccae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. peraccae</emphasis>
|
||
</taxonomicName>
|
||
(Nobili, 1903) [Singapore and Peninsular Malaysia],
|
||
<taxonomicName lsidName="G. penangense" pageId="0" pageNumber="1" rank="species" species="penangense">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. penangense</emphasis>
|
||
</taxonomicName>
|
||
(Tweedie, 1940) [Penang, Peninsular Malaysia],
|
||
<taxonomicName lsidName="G. sarawakense" pageId="0" pageNumber="1" rank="species" species="sarawakense">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. sarawakense</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<normalizedToken originalValue="Serène">Serene</normalizedToken>
|
||
, 1968) [Sarawak, Borneo] and
|
||
<taxonomicName lsidName="G. pylaemenes" pageId="0" pageNumber="1" rank="species" species="pylaemenes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. pylaemenes</emphasis>
|
||
</taxonomicName>
|
||
Ng, 2015 [western Borneo].
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
can be distinguished from these species mainly by the distinctive form of its G1. Compared to
|
||
<taxonomicName lsidName="G. amphinome" pageId="0" pageNumber="1" rank="species" species="amphinome">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. amphinome</emphasis>
|
||
</taxonomicName>
|
||
, the distal chitinised part of the G1 of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
is distinctly shorter and the tip is not bilobed (cf.
|
||
<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.4048.1.2" author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="37 - 56" refId="B11" refString="Ng, PKL, 2015. Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species. . Zootaxa 4048: 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>
|
||
: fig. 1A, B, 2A,
|
||
<normalizedToken originalValue="G–K">G-K</normalizedToken>
|
||
). Compared to
|
||
<taxonomicName lsidName="G. peraccae" pageId="0" pageNumber="1" rank="species" species="peraccae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. peraccae</emphasis>
|
||
</taxonomicName>
|
||
, the G1 of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
is stouter overall with the chitinous part proportionately much shorter (cf.
|
||
<bibRefCitation author="Ng, PKL" journalOrPublisher="Department of Zoology, National University of Singapore, Shinglee Press" pageId="0" pageNumber="1" refId="B9" refString="Ng, PKL, 1988. The Freshwater Crabs of Peninsular Malaysia and Singapore. . Department of Zoology, National University of Singapore, Shinglee Press" title="The Freshwater Crabs of Peninsular Malaysia and Singapore." year="1988">Ng 1988</bibRefCitation>
|
||
: fig. 56A,
|
||
<normalizedToken originalValue="D–F">D-F</normalizedToken>
|
||
;
|
||
<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.4048.1.2" author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="37 - 56" refId="B11" refString="Ng, PKL, 2015. Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species. . Zootaxa 4048: 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>
|
||
: fig. 5A, B). The G1 of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
differs from that of
|
||
<taxonomicName lsidName="G. penangense" pageId="0" pageNumber="1" rank="species" species="penangense">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. penangense</emphasis>
|
||
</taxonomicName>
|
||
in having the distal part gently curved rather than strongly bent, with the ambulatory leg merus proportionately stouter (cf.
|
||
<bibRefCitation author="Ng, PKL" journalOrPublisher="Department of Zoology, National University of Singapore, Shinglee Press" pageId="0" pageNumber="1" refId="B9" refString="Ng, PKL, 1988. The Freshwater Crabs of Peninsular Malaysia and Singapore. . Department of Zoology, National University of Singapore, Shinglee Press" title="The Freshwater Crabs of Peninsular Malaysia and Singapore." year="1988">Ng 1988</bibRefCitation>
|
||
: fig. 58A, D, E). When compared to
|
||
<taxonomicName lsidName="G. sarawakense" pageId="0" pageNumber="1" rank="species" species="sarawakense">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. sarawakense</emphasis>
|
||
</taxonomicName>
|
||
, the carapace of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
is distinctly more granulated and rugose, with the G1 proportionately stouter and shorter (
|
||
<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.4048.1.2" author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="37 - 56" refId="B11" refString="Ng, PKL, 2015. Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species. . Zootaxa 4048: 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>
|
||
: figs 6A, B, 7
|
||
<normalizedToken originalValue="D–F">D-F</normalizedToken>
|
||
). In contrast to
|
||
<taxonomicName lsidName="G. pylaemenes" pageId="0" pageNumber="1" rank="species" species="pylaemenes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. pylaemenes</emphasis>
|
||
</taxonomicName>
|
||
, the external orbital tooth of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
is more acute and the G1 is relatively stouter (cf.
|
||
<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.4048.1.2" author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="37 - 56" refId="B11" refString="Ng, PKL, 2015. Semiterrestrial crabs of the genus Geosesarma De Man, 1892 (Crustacea, Brachyura, Sesarmidae) from western Borneo, Indonesia, with descriptions of three new species. . Zootaxa 4048: 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>
|
||
: fig. 3A, B, 4
|
||
<normalizedToken originalValue="D–G">D-G</normalizedToken>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
In Taiwan and other parts of the Indo-West Pacific,
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
can be confused with species of
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Scandarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Scandarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Scandarma</emphasis>
|
||
</taxonomicName>
|
||
Schubart, Liu & Cuesta, 2003 (type species
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Scandarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Scandarma lintou" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="lintou">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Scandarma lintou</emphasis>
|
||
</taxonomicName>
|
||
Schubart, Liu & Cuesta, 2003), and
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Pseudosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudosesarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Pseudosesarma</emphasis>
|
||
</taxonomicName>
|
||
<normalizedToken originalValue="Serène">Serene</normalizedToken>
|
||
& Soh, 1970 (type species
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Sesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Sesarma edwardsii" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="edwardsii">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Sesarma edwardsii</emphasis>
|
||
</taxonomicName>
|
||
De Man, 1887) because in these genera, the male chelipeds do not have pectinated ridges on their chelae and there are no stridulatory granules on the dorsal margin of the dactylus.
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
can be easily distinguished from species of
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Scandarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Scandarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Scandarma</emphasis>
|
||
</taxonomicName>
|
||
as the outer surface of the male chela does not have a distinct swelling and the G1 is very short and stout (see
|
||
<bibRefCitation author="Schubart, CD" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="1" pagination="49 - 59" refId="B23" refString="Schubart, CD, Liu, H-C, Cuesta, JA, 2003. A new genus and species of tree-climbing crab (Crustacea: Brachyura: Sesarmidae) from Taiwan with notes on its ecology and larval morphology. . Raffles Bulletin of Zoology 51: 49 - 59" title="A new genus and species of tree-climbing crab (Crustacea: Brachyura: Sesarmidae) from Taiwan with notes on its ecology and larval morphology." volume="51" year="2003">Schubart et al. 2003</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Naruse, T" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="1" pagination="337 - 341" refId="B7" refString="Naruse, T, Ng, PKL, 2007. Scandarmasplendidum, a new species of tree-climbing crab (Decapoda: Brachyura: Sesarmidae) from Sarawak, Malaysia, Borneo. . Raffles Bulletin of Zoology 55: 337 - 341" title="Scandarmasplendidum, a new species of tree-climbing crab (Decapoda: Brachyura: Sesarmidae) from Sarawak, Malaysia, Borneo." volume="55" year="2007">Naruse and Ng 2007</bibRefCitation>
|
||
;
|
||
<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.3652.2.6" author="Ng, PKL" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="289 - 294" refId="B10" refString="Ng, PKL, 2013. A new species of Scandarma (Crustacea: Brachyura: Sesarmidae) from Sabah, Borneo, Malaysia. . Zootaxa 3652: 289 - 294" title="A new species of Scandarma (Crustacea: Brachyura: Sesarmidae) from Sabah, Borneo, Malaysia." url="https://doi.org/10.11646/zootaxa.3652.2.6" volume="3652" year="2013">Ng 2013</bibRefCitation>
|
||
;
|
||
<bibRefCitation pageId="0" pageNumber="1" refId="B8">Naruse and Ng 2019</bibRefCitation>
|
||
). From
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Pseudosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudosesarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Pseudosesarma</emphasis>
|
||
</taxonomicName>
|
||
, many members of which live in freshwaters,
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
can be distinguished by the G1 morphology, with those of
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Pseudosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudosesarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Pseudosesarma</emphasis>
|
||
</taxonomicName>
|
||
species short, very stout with the median or distal parts prominently dilated and with sharp chitinised
|
||
<normalizedToken originalValue="“beaks”">"beaks"</normalizedToken>
|
||
(see
|
||
<bibRefCitation author="Ng, PKL" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="1" pagination="655 - 669" refId="B18" refString="Ng, PKL, Schubart, CD, 2017. On the taxonomy of Pseudosesarmaedwardsii (De Man, 1887) and P.crassimanum (De Man, 1887) (Crustacea: Decapoda: Brachyura: Sesarmidae), with description of a new species from Sri Lanka. . Raffles Bulletin of Zoology 65: 655 - 669" title="On the taxonomy of Pseudosesarmaedwardsii (De Man, 1887) and P. crassimanum (De Man, 1887) (Crustacea: Decapoda: Brachyura: Sesarmidae), with description of a new species from Sri Lanka." volume="65" year="2017">Ng and Schubart 2017</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<caption doi="10.3897/zookeys.858.35198.figure5" httpUri="https://binary.pensoft.net/fig/314512" pageId="0" pageNumber="1" start="Figure 5" startId="F5">
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Figure 5.
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. paratype female (10.6 x 9.2 mm) (ZRC 2019.0513), Taiwan
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
|
||
overall dorsal view
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
anterior thoracic sternum and pleon
|
||
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
|
||
sternopleonal cavity and vulvae.
|
||
</paragraph>
|
||
</caption>
|
||
<caption doi="10.3897/zookeys.858.35198.figure6" httpUri="https://binary.pensoft.net/fig/314513" pageId="0" pageNumber="1" start="Figure 6" startId="F6">
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Figure 6. Habitat of
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
sp. nov.
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
|
||
Chilan River, Jhongpu, Chiayi County, Taiwan,
|
||
<geoCoordinate degrees="23.43744" direction="north" orientation="latitude" precision="1" value="23.43744">23.43744N</geoCoordinate>
|
||
,
|
||
<geoCoordinate degrees="120.48917" direction="east" orientation="longitude" precision="1" value="120.48917">120.48917E</geoCoordinate>
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
Lunziding Canal, Jhongpu, Chiayi County, Taiwan,
|
||
<geoCoordinate degrees="23.44914" direction="north" orientation="latitude" precision="1" value="23.44914">23.44914N</geoCoordinate>
|
||
,
|
||
<geoCoordinate degrees="120.48227" direction="east" orientation="longitude" precision="1" value="120.48227">120.48227E</geoCoordinate>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="ecology">
|
||
<paragraph pageId="0" pageNumber="1">Ecology.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. has a semi-terrestrial habit and has been found in small streams in lowlands, with the crabs digging burrows under stones near the edge of the water. The first author investigated 28 sites in and around the type locality of species, in the Ba-Jhang River region (total area of ca. 200 km2). Most of the sites examined were badly polluted, cemented, built over or no longer had permanent water. There were some sites with clean water but these were very close to the hills (altitude higher than ca. 100 m) but these sites only had the primary freshwater crab,
|
||
<taxonomicName class="Malacostraca" family="Potamidae" genus="Geothelphusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geothelphusa olea" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="olea">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geothelphusa olea</emphasis>
|
||
</taxonomicName>
|
||
Shy, Ng & Yu, 1994 (
|
||
<taxonomicName family="Potamidae" lsidName="" pageId="0" pageNumber="1" rank="family">Potamidae</taxonomicName>
|
||
). Of the 28 sites surveyed,
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma mirum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma mirum</emphasis>
|
||
</taxonomicName>
|
||
was only found in six sites (in an area of ca. 4 km2). These six sites were from different branches of the river and the crabs were relatively abundant in each of these locations (sometimes more than 50 individuals/m2). From the surveys done, the species seems to have a relatively localised distribution, with some of the sites where they were found only a few dozen square metres in area, and the crabs absent from sites further upstream or downstream. This may not be the natural situation as the sites where the crabs were absent were invariably badly polluted or extensively concreted.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The development of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
is direct (i.e., abbreviated), with the eggs measuring ca. 1.0 mm in diameter (specimen not preserved) (
|
||
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Geosesarma mirum sp. nov. A, B male (9.9 x 8.6 mm) (NTOU F 10396) C ovigerous female with eggs (specimen not collected) D brooding female with young crabs (specimen not collected). Photographs A-C J-Y Shy, D Peter Wang." figureDoi="10.3897/zookeys.858.35198.figure1" httpUri="https://binary.pensoft.net/fig/314508" pageId="0" pageNumber="1">Fig. 1C</figureCitation>
|
||
). The egg sizes of
|
||
<taxonomicName class="Malacostraca" family="Sesarmidae" genus="Geosesarma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Geosesarma" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Geosesarma</emphasis>
|
||
</taxonomicName>
|
||
species average between 1.2 and 1.8 mm (
|
||
<bibRefCitation author="Ng, PKL" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="1" pagination="226 - 242" refId="B12" refString="Ng, PKL, 2017. 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). . Raffles Bulletin of Zoology 65: 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">Ng 2017</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Ng, PKL" journalOrPublisher="Raffles Bulletin of Zoology" pageId="0" pageNumber="1" pagination="217 - 246" refId="B21" refString="Ng, PKL, Wowor, D, 2019. The vampire crabs of Java, with descriptions of five new species from Mount Halimun Salak National Park, West Java, Indonesia (Crustacea: Brachyura: Sesarmidae: Geosesarma). . Raffles Bulletin of Zoology 67: 217 - 246" title="The vampire crabs of Java, with descriptions of five new species from Mount Halimun Salak National Park, West Java, Indonesia (Crustacea: Brachyura: Sesarmidae: Geosesarma)." volume="67" year="2019">Ng and Wowor 2019</bibRefCitation>
|
||
). Despite the slightly smaller egg size, we have observed females of
|
||
<taxonomicName lsidName="G. mirum" pageId="0" pageNumber="1" rank="species" species="mirum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">G. mirum</emphasis>
|
||
</taxonomicName>
|
||
brooding young crabs under the pleon (
|
||
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Geosesarma mirum sp. nov. A, B male (9.9 x 8.6 mm) (NTOU F 10396) C ovigerous female with eggs (specimen not collected) D brooding female with young crabs (specimen not collected). Photographs A-C J-Y Shy, D Peter Wang." figureDoi="10.3897/zookeys.858.35198.figure1" httpUri="https://binary.pensoft.net/fig/314508" pageId="0" pageNumber="1">Fig. 1D</figureCitation>
|
||
) and it is clear that the development is completely abbreviated (see
|
||
<bibRefCitation DOI="https://doi.org/10.1163/156854095X00557" author="Ng, PKL" journalOrPublisher="Crustaceana" pageId="0" pageNumber="1" pagination="390 - 395" refId="B20" refString="Ng, PKL, Tan, CGS, 1995. Geosesarmanotophorum sp. nov. (Decapoda, Brachyura, Grapsidae, Sesarminae), a terrestrial crab from Sumatra, with novel brooding behaviour. . Crustaceana 68: 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>
|
||
). This contrasts with catadromous grapsoid species like
|
||
<taxonomicName class="Malacostraca" family="Varunidae" genus="Eriocheir" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriocheir japonica" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="japonica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Eriocheir japonica</emphasis>
|
||
</taxonomicName>
|
||
(De Haan, 1835) (
|
||
<taxonomicName family="Varunidae" lsidName="" pageId="0" pageNumber="1" rank="family">Varunidae</taxonomicName>
|
||
) which have much smaller eggs (ca. 0.34 mm; cf.
|
||
<bibRefCitation author="Lai, H-G" journalOrPublisher="Journal of Fishery Society of Taiwan" pageId="0" pageNumber="1" pagination="12 - 21" refId="B4" refString="Lai, H-G, Shy, J-Y, Yu, H-P, 1986. Morphological observation on the development of larval Eriocheirjaponica (Crustacea: Decapoda: Grapsidae) reared in the laboratory. . Journal of Fishery Society of Taiwan 13: 12 - 21" title="Morphological observation on the development of larval Eriocheirjaponica (Crustacea: Decapoda: Grapsidae) reared in the laboratory." volume="13" year="1986">Lai et al. 1986</bibRefCitation>
|
||
). Their eggs, however, are still smaller than those of primary freshwater species like
|
||
<taxonomicName class="Malacostraca" family="Potamidae" genus="Nanhaipotamon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nanhaipotamon formosanum" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="formosanum">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Nanhaipotamon formosanum</emphasis>
|
||
</taxonomicName>
|
||
(Parisi, 1916) (
|
||
<taxonomicName family="Potamidae" lsidName="" pageId="0" pageNumber="1" rank="family">Potamidae</taxonomicName>
|
||
) which have egg diameters of up to 4.0 mm (cf.
|
||
<bibRefCitation author="Lai, H-T" journalOrPublisher="Taiwan Nature Science" pageId="0" pageNumber="1" pagination="50 - 53" refId="B5" refString="Lai, H-T, Sheng, C-C, Shy, J-Y, 2012. Habitation, reproduction and juvenile development of freshwater crab: Taiwan endemic freshwater crab Nanhaipotamonformosanum. . Taiwan Nature Science 31: 50 - 53" title="Habitation, reproduction and juvenile development of freshwater crab: Taiwan endemic freshwater crab Nanhaipotamonformosanum." volume="31" year="2012">Lai et al. 2012</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |