605 lines
86 KiB
XML
605 lines
86 KiB
XML
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<mods:title id="5B91BB172F4A39DD5B98A1F02E6C9393">New data on the taxonomy, ecology, and conservation of the rediscovered Louisea edeaensis (Bott, 1969) (Brachyura: Potamoidea: Potamonautidae), an endangered freshwater crab from Cameroon</mods:title>
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<mods:namePart id="D68C8D44C11767411FF467CE34A5E1F2">Mvogo Ndongo, Pierre A.</mods:namePart>
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<mods:namePart id="C4D9E9C83C0A3620D011F8576A6FC147">Rintelen, Thomas Von</mods:namePart>
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<mods:namePart id="787956C5A101CA81D9B0B21E73D77A97">Schubart, Christoph D.</mods:namePart>
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<mods:namePart id="50B685A9C0936D496CAE352F108A4406">Albrecht, Christian</mods:namePart>
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<mods:namePart id="0C15A3354B4AC450BA1169B0AE33A088">Tamesse, Joseph L.</mods:namePart>
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<mods:namePart id="FB4774882AEC1F84241D2397D3E224A3">Cumberlidge, Neil</mods:namePart>
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<mods:title id="951FC128A4B75AFBDF68E346E66E2023">Zootaxa</mods:title>
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<treatment id="403AB05AFFD29F2F07A7F9CCFA7C3468" ID-DOI="http://doi.org/10.5281/zenodo.6015440" ID-GBIF-Taxon="127694684" ID-Zenodo-Dep="6015440" LSID="urn:lsid:plazi:treatment:403AB05AFFD29F2F07A7F9CCFA7C3468" httpUri="http://treatment.plazi.org/id/403AB05AFFD29F2F07A7F9CCFA7C3468" lastPageId="6" lastPageNumber="279" pageId="1" pageNumber="274">
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<subSubSection id="808952C7FFD29F2807A7F9CCFEF035ED" pageId="1" pageNumber="274" type="nomenclature">
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<paragraph id="C82C014CFFD29F2807A7F9CCFDEA3502" blockId="1.[151,523,1613,1672]" box="[151,523,1613,1639]" pageId="1" pageNumber="274">
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<heading id="9364B620FFD29F2807A7F9CCFDEA3502" bold="true" box="[151,523,1613,1639]" fontSize="11" level="1" pageId="1" pageNumber="274" reason="1">
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<taxonomicName id="0F937ACFFFD29F2807A7F9CCFDEA3502" ID-CoL="3W8BZ" authority="Bott, 1969" authorityName="Bott" authorityYear="1969" box="[151,523,1613,1639]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="274" phylum="Arthropoda" rank="species" species="edeaensis">
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<emphasis id="FAE7DD5EFFD29F2807A7F9CCFDEA3502" bold="true" box="[151,523,1613,1639]" pageId="1" pageNumber="274">
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<emphasis id="FAE7DD5EFFD29F2807A7F9CCFE933502" bold="true" box="[151,370,1613,1639]" italics="true" pageId="1" pageNumber="274">Louisea edeaensis</emphasis>
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(
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<bibRefCitation id="AC027CBDFFD29F2806B1F9CCFDE23502" author="Bott" box="[385,515,1613,1639]" pageId="1" pageNumber="274" refString="Bott, R. (1969) Adaptation, Evolution und Besiedlungsgeschichte der Sußwasserkrabben der Erde. Natur und Museum, 99, 266 - 275." type="journal article" year="1969">Bott, 1969</bibRefCitation>
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)
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</emphasis>
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</taxonomicName>
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</heading>
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</paragraph>
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<paragraph id="C82C014CFFD29F2807A7F9EEFEF035ED" blockId="1.[151,523,1613,1672]" box="[151,273,1647,1672]" pageId="1" pageNumber="274">
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(
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<figureCitation id="50A81DC9FFD29F2807AFF9EEFEE835ED" box="[159,265,1647,1672]" captionStart-0="FIGURE 1" captionStart-1="FIGURE 2" captionStart-2="FIGURE 3" captionStartId-0="2.[151,250,1846,1868]" captionStartId-1="3.[151,250,1170,1192]" captionStartId-2="4.[151,250,1328,1350]" captionTargetBox-0="[217,1369,772,1822]" captionTargetBox-1="[217,1369,193,1149]" captionTargetBox-2="[217,1369,445,1307]" captionTargetId-0="figure@2.[217,1369,772,1822]" captionTargetId-1="figure@3.[217,1369,193,1149]" captionTargetId-2="figure@4.[217,1369,445,1307]" captionTargetPageId-0="2" captionTargetPageId-1="3" captionTargetPageId-2="4" captionText-0="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." captionText-1="FIGURE 2 A. Louisea edeaensis (Bott, 1969), adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2 B is an adult female not presented in the present study." captionText-2="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri-0="https://zenodo.org/record/291386/files/figure.png" httpUri-1="https://zenodo.org/record/291387/files/figure.png" httpUri-2="https://zenodo.org/record/291388/files/figure.png" pageId="1" pageNumber="274">Figs. 1–3</figureCitation>
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)
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</paragraph>
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</subSubSection>
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<subSubSection id="808952C7FFD29F2807A7F939FBC6346E" pageId="1" pageNumber="274" type="reference_group">
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<paragraph id="C82C014CFFD29F2807A7F939FBC6346E" blockId="1.[151,1436,1720,1803]" pageId="1" pageNumber="274">
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<treatmentCitationGroup id="E8832662FFD29F2807A7F939FBC6346E" infered="true" pageId="1" pageNumber="274">
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<taxonomicName id="0F937ACFFFD29F2807A7F939FD7335AB" ID-CoL="6KJGD" authority="Bott, 1969: 360" authorityName="Bott" authorityPageNumber="360" authorityYear="1969" box="[151,658,1720,1742]" class="Malacostraca" family="Potamonautidae" genus="Globonautes" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="274" phylum="Arthropoda" rank="subSpecies" species="macropus" subSpecies="edeaensis">
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<emphasis id="FAE7DD5EFFD29F2807A7F939FE0A35AB" box="[151,491,1720,1742]" italics="true" pageId="1" pageNumber="274">Globonautes macropus edeaensis</emphasis>
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<treatmentCitation id="4932275DFFD29F2806C0F938FD7335AB" author="Bott" box="[496,658,1720,1742]" page="360" pageId="1" pageNumber="274" year="1969">
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<bibRefCitation id="AC027CBDFFD29F2806C0F938FDBE35AB" author="Bott" box="[496,607,1720,1742]" pageId="1" pageNumber="274" refString="Bott, R. (1969) Adaptation, Evolution und Besiedlungsgeschichte der Sußwasserkrabben der Erde. Natur und Museum, 99, 266 - 275." type="journal article" year="1969">Bott, 1969</bibRefCitation>
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: 360
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</treatmentCitation>
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</taxonomicName>
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;1970: 24, pl. 1, fig. 3–5, pl. 26, fig. 8;
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<treatmentCitation id="4932275DFFD29F28032AF939FAF835AB" author="Cumberlidge" box="[1050,1305,1720,1742]" page="2215" pageId="1" pageNumber="274" year="1987">
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<bibRefCitation id="AC027CBDFFD29F28032AF939FB3A35AB" author="Cumberlidge" box="[1050,1243,1720,1742]" pageId="1" pageNumber="274" refString="Cumberlidge, N. (1987) Notes on the taxonomy of West African gecarcinucids of the genus Globonautes (Brachyura, Decapoda). Canadian Journal of Zoology, 65, 2210 - 2215." type="journal article" year="1987">Cumberlidge 1987</bibRefCitation>
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: 2215
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</treatmentCitation>
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, table 2.
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<emphasis id="FAE7DD5EFFD29F2807A7F959FE863589" box="[151,359,1750,1773]" italics="true" pageId="1" pageNumber="274">
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<taxonomicName id="0F937ACFFFD29F2807A7F959FF063588" ID-CoL="7PN3K" box="[151,231,1752,1773]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="274" phylum="Arthropoda" rank="genus">Louisea</taxonomicName>
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edeaensis—
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</emphasis>
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||
<treatmentCitation id="4932275DFFD29F280657F957FDBB3589" author="Cumberlidge" box="[359,602,1750,1772]" page="124" pageId="1" pageNumber="274" year="1994">
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||
<bibRefCitation id="AC027CBDFFD29F280657F957FDC83589" author="Cumberlidge" box="[359,553,1750,1772]" pageId="1" pageNumber="274" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
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||
: 124
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</treatmentCitation>
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–125, fig. 1, table 1; 1997: 577; 1999: 227, 5300, 54–57, figs 46F, 47E, 48E, 49F, 51F, 52F, 62F, 68F, table IX, plate 3; Ng
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<emphasis id="FAE7DD5EFFD29F280554F977FD79346E" box="[612,664,1781,1803]" italics="true" pageId="1" pageNumber="274">et al.</emphasis>
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2008: 168;
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<treatmentCitation id="4932275DFFD29F280421F974FBC2346E" author="Cumberlidge" box="[785,1059,1781,1803]" page="6" pageId="1" pageNumber="274" year="2009">
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<bibRefCitation id="AC027CBDFFD29F280421F974FBEB346E" author="Cumberlidge" box="[785,1034,1781,1803]" pageId="1" pageNumber="274" refString="Cumberlidge, N., Ng, P. K. L., Yeo, D. C. J., Magalhaes, C., Campos, M. R., Alvarez, F., Naruse, T., Daniels, S. R., Esser, L. J., Attipoe, F. Y. K., Clotilde-Ba, F. L., Darwall, W., McIvor, A., Ram, M. & Collen, B. (2009) Freshwater crabs and the biodiversity crisis: importance, threats, status, and conservation challenges. Biological Conservation, 142, 1665 - 1673. https: // doi. org / 10.1016 / j. biocon. 2009.02.038" type="journal article" year="2009">
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Cumberlidge
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<emphasis id="FAE7DD5EFFD29F2804ABF977FC2E346E" box="[923,975,1781,1803]" italics="true" pageId="1" pageNumber="274">et al.</emphasis>
|
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2009
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</bibRefCitation>
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: 6
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</treatmentCitation>
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.
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</treatmentCitationGroup>
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</paragraph>
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<subSubSection id="808952C7FFD29F2B07A7F8B6FEB5339D" lastPageId="2" lastPageNumber="275" pageId="1" pageNumber="274" type="materials_examined">
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<paragraph id="C82C014CFFD29F2B07A7F8B6FEB5339D" blockId="1.[151,1436,1847,2017]" lastBlockId="2.[151,1437,151,717]" lastPageId="2" lastPageNumber="275" pageId="1" pageNumber="274">
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examined.
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</emphasis>
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<collectingCountry id="B08441DCFFD29F2806BBF8B9FDD13435" box="[395,560,1848,1872]" name="Cameroon" pageId="1" pageNumber="274">CAMEROON</collectingCountry>
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:
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<specimenCount id="DE95CAC5FFD29F28050CF8B9FD6A3435" box="[572,651,1847,1872]" pageId="1" pageNumber="274" type="adult">1 adult</specimenCount>
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<specimenCount id="DE95CAC5FFD29F2805A3F8B9FD49342A" box="[659,680,1848,1871]" pageId="1" pageNumber="274" type="male">♂</specimenCount>
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(CW 17.5, CL 13.3, CH 6.8, FW 6.8) (
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<collectionCode id="AE829989FFD29F280341F8B9FB4E3435" box="[1137,1199,1848,1872]" country="Germany" httpUri="http://grbio.org/cool/8syf-d21i" name="Museum f<>r Naturkunde Berlin (Zoological Collections)" pageId="1" pageNumber="274">ZMB</collectionCode>
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Crust. 26930),
|
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<collectingMunicipality id="28489B36FFD29F280254F8B6FF313411" pageId="1" pageNumber="274">Lake Ossa</collectingMunicipality>
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,
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<collectingCounty id="214D79C0FFD29F2807EBF8DDFE643410" box="[219,389,1884,1909]" pageId="1" pageNumber="274">Bedimet Island</collectingCounty>
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(
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;
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),
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<quantity id="0F6BACA9FFD29F2805DFF8DDFCC93411" box="[751,808,1884,1908]" metricMagnitude="1" metricUnit="m" metricValue="9.0" pageId="1" pageNumber="274" unit="m" value="90.0">90 m</quantity>
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</elevation>
|
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asl,
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<collectingDate id="AC69DE64FFD29F28046CF8DDFC093410" box="[860,1000,1884,1909]" pageId="1" pageNumber="274" value="2015-07-10">
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<date id="BC2D278CFFD29F28046CF8DDFC093410" box="[860,1000,1884,1909]" pageId="1" pageNumber="274" value="2015-07-10">10 Jul. 2015</date>
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</collectingDate>
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||
, coll.
|
||
<collectorName id="6566649AFFD29F28031BF8DCFAFF3410" box="[1067,1310,1884,1909]" pageId="1" pageNumber="274">P. A. Mvogo Ndongo</collectorName>
|
||
</materialsCitation>
|
||
; 6 subadult ♂s (CWs 15.0, 15.0, 14.1, 14.6, 12.5, 12.0) (LZUY 15-1), 4 adult ♀s (CWs 19.9, 17.4, 16.8, 16.7) (LZUY 15-2); 6 subadult ♀s (CWs 15.5, 14.9, 14.8, 13.8, 13.0, 12.5) (LZUY 15-3), same collection data as ZMB Crust. 26930;
|
||
<materialsCitation id="78FB0B11FFD29F2802BEF825FB043484" ID-GBIF-Occurrence="1427604101" collectingDate="2016-01-15" collectionCode="LZUY" collectorName="P. A. Mvogo Ndongo" country="Cameroon" county="Bedimet Island" elevation="90" latitude="3.8159833" location="Material" longLatPrecision="1" longitude="10.05515" municipality="Lake Ossa" pageId="1" pageNumber="274" specimenCode="LZUY 15-4" specimenCount="3">
|
||
<specimenCount id="DE95CAC5FFD29F2802BEF825FF213484" pageId="1" pageNumber="274" type="generic">3 juv.</specimenCount>
|
||
(CWs 11.0, 11.0, 5.6) (
|
||
<specimenCode id="9835A937FFD29F2806FEF849FDB93484" box="[462,600,1992,2017]" collectionCode="LZUY" pageId="1" pageNumber="274">
|
||
<collectionCode id="AE829989FFD29F2806FEF849FDFA3485" box="[462,539,1992,2016]" pageId="1" pageNumber="274">LZUY</collectionCode>
|
||
15-4
|
||
</specimenCode>
|
||
), same locality,
|
||
<collectingDate id="AC69DE64FFD29F280423F849FC463484" box="[787,935,1992,2017]" pageId="1" pageNumber="274" value="2016-01-15">
|
||
<date id="BC2D278CFFD29F280423F849FC463484" box="[787,935,1992,2017]" pageId="1" pageNumber="274" value="2016-01-15">15 Jan. 2016</date>
|
||
</collectingDate>
|
||
, coll.
|
||
<collectorName id="6566649AFFD29F2804DEF848FB043484" box="[1006,1253,1992,2017]" pageId="1" pageNumber="274">P. A. Mvogo Ndongo</collectorName>
|
||
</materialsCitation>
|
||
; 1 adult ♂ (CW 19.3),
|
||
<materialsCitation id="78FB0B11FFD19F2B07D5FF19FEB5339D" ID-GBIF-Occurrence="1427604103" collectionCode="NHMW" collectorName="Yaounde & Haberer. The" country="Iceland" location="Island" pageId="2" pageNumber="275" specimenCode="NHMW 1877" specimenCount="3" specimenCount-adult="2" specimenCount-female="1">
|
||
<specimenCount id="DE95CAC5FFD19F2B07D5FF19FED933D5" box="[229,312,151,176]" pageId="2" pageNumber="275" type="adult">2 adult</specimenCount>
|
||
<specimenCount id="DE95CAC5FFD19F2B0675FF19FEB933CA" box="[325,344,152,175]" pageId="2" pageNumber="275" type="female">♀</specimenCount>
|
||
s (CWs 19.4, 17.5) (
|
||
<specimenCode id="9835A937FFD19F2B0562FF19FD1833D5" box="[594,761,152,176]" collectionCode="NHMW" country="Austria" httpUri="http://grbio.org/cool/91g3-0mnw" name="Naturhistorisches Museum, Wien" pageId="2" pageNumber="275">
|
||
<collectionCode id="AE829989FFD19F2B0562FF19FD5133D5" box="[594,688,152,176]" country="Austria" httpUri="http://grbio.org/cool/91g3-0mnw" name="Naturhistorisches Museum, Wien" pageId="2" pageNumber="275">NHMW</collectionCode>
|
||
1877
|
||
</specimenCode>
|
||
),
|
||
<collectorName id="6566649AFFD19F2B0422FF16FC9633D5" box="[786,887,151,176]" pageId="2" pageNumber="275">Yaounde</collectorName>
|
||
, 1907, coll.
|
||
<collectorName id="6566649AFFD19F2B0321FF16FB4B33D5" box="[1041,1194,151,176]" pageId="2" pageNumber="275">Haberer. The</collectorName>
|
||
differences between juveniles, subadults, and adults of the collected specimens of
|
||
<taxonomicName id="0F937ACFFFD19F2B0476FF3CFBF333B1" box="[838,1042,188,212]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="2" pageNumber="275" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD19F2B0476FF3CFBF333B1" box="[838,1042,188,212]" italics="true" pageId="2" pageNumber="275">Louisea edeaensis</emphasis>
|
||
</taxonomicName>
|
||
observed from Bedimet
|
||
<collectingCountry id="B08441DCFFD19F2B0218FF3DFA8E33B0" box="[1320,1391,188,213]" name="Iceland" pageId="2" pageNumber="275">Island</collectingCountry>
|
||
, are discussed below.
|
||
</materialsCitation>
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="808952C7FFD19F2B07F7FE85FE5A3159" pageId="2" pageNumber="275" type="diagnosis">
|
||
<paragraph id="C82C014CFFD19F2B07F7FE85FE5A3159" blockId="2.[151,1437,151,717]" pageId="2" pageNumber="275">
|
||
<emphasis id="FAE7DD5EFFD19F2B07F7FE85FEA03278" bold="true" box="[199,321,260,285]" pageId="2" pageNumber="275">Diagnosis.</emphasis>
|
||
Carapace moderately high (
|
||
<collectingCountry id="B08441DCFFD19F2B05BAFE85FD503279" box="[650,689,260,284]" name="Switzerland" pageId="2" pageNumber="275">CH</collectingCountry>
|
||
/FW 1.0–1.1), smooth, postfrontal crest faint, complete, meeting epibranchial teeth; exorbital tooth small, low, epibranchial tooth small, intermediate tooth between exorbital, epibranchial teeth small but distinct (
|
||
<figureCitation id="50A81DC9FFD19F2B0568FECDFD583201" box="[600,697,332,357]" captionStart="FIGURE 2" captionStartId="3.[151,250,1170,1192]" captionTargetBox="[217,1369,193,1149]" captionTargetId="figure@3.[217,1369,193,1149]" captionTargetPageId="3" captionText="FIGURE 2 A. Louisea edeaensis (Bott, 1969), adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2 B is an adult female not presented in the present study." httpUri="https://zenodo.org/record/291387/files/figure.png" pageId="2" pageNumber="275">Fig. 2A</figureCitation>
|
||
); third maxilliped exopod completely lacking flagellum, third maxilliped ischium with vertical groove (
|
||
<figureCitation id="50A81DC9FFD19F2B055CFEEEFD4D32ED" box="[620,684,367,392]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="2" pageNumber="275">Fig. 1</figureCitation>
|
||
C); mandibular palp with small lobe at junction between terminal, subterminal segments (
|
||
<figureCitation id="50A81DC9FFD19F2B06ABFE15FE3A32C9" box="[411,475,404,429]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="2" pageNumber="275">Fig. 1</figureCitation>
|
||
D); medial inferior margin of cheliped merus with large jagged distal tooth, followed by row of small pointed teeth along rest of meral margin (
|
||
<figureCitation id="50A81DC9FFD19F2B0470FE36FC6332B5" box="[832,898,439,464]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="2" pageNumber="275">Fig. 1</figureCitation>
|
||
B), first carpal tooth on cheliped carpus large, broad, bigger than second carpal tooth (
|
||
<figureCitation id="50A81DC9FFD19F2B055CFE5DFD513291" box="[620,688,476,501]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="2" pageNumber="275">Fig. 1</figureCitation>
|
||
A); G1 terminal article outwardly-directed, base broad, tapering distally, ending in blunt hose-like tip (
|
||
<figureCitation id="50A81DC9FFD19F2B050FFE7EFD61317D" box="[575,640,511,536]" captionStart="FIGURE 3" captionStartId="4.[151,250,1328,1350]" captionTargetBox="[217,1369,445,1307]" captionTargetId="figure@4.[217,1369,445,1307]" captionTargetPageId="4" captionText="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="2" pageNumber="275">Fig. 3</figureCitation>
|
||
A, B); G2 terminal article long, flagellum-like (
|
||
<figureCitation id="50A81DC9FFD19F2B03A4FE7EFB37317D" box="[1172,1238,511,536]" captionStart="FIGURE 3" captionStartId="4.[151,250,1328,1350]" captionTargetBox="[217,1369,445,1307]" captionTargetId="figure@4.[217,1369,445,1307]" captionTargetPageId="4" captionText="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="2" pageNumber="275">Fig. 3</figureCitation>
|
||
C); small species, mature at CW
|
||
<quantity id="0F6BACA9FFD19F2B060BFDA5FE563159" box="[315,439,548,573]" metricMagnitude="-2" metricUnit="m" metricValue="1.65" metricValueMax="1.7" metricValueMin="1.6" pageId="2" pageNumber="275" unit="mm" value="16.5" valueMax="17.0" valueMin="16.0">16–17 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="808952C7FFD19F2C07F7FDC6FF08339D" lastPageId="5" lastPageNumber="278" pageId="2" pageNumber="275" type="description">
|
||
<paragraph id="C82C014CFFD19F2B07F7FDC6FC1D31E0" blockId="2.[151,1437,151,717]" pageId="2" pageNumber="275">
|
||
<emphasis id="FAE7DD5EFFD19F2B07F7FDC6FEB83105" bold="true" box="[199,345,583,608]" pageId="2" pageNumber="275">Description.</emphasis>
|
||
For a full description see
|
||
<bibRefCitation id="AC027CBDFFD19F2B05B0FDC6FCBE3105" author="Cumberlidge" box="[640,863,583,608]" pageId="2" pageNumber="275" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge (1994</bibRefCitation>
|
||
,
|
||
<bibRefCitation id="AC027CBDFFD19F2B045AFDC9FC473105" author="Cumberlidge" box="[874,934,584,608]" pageId="2" pageNumber="275" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">1999</bibRefCitation>
|
||
). Character state descriptions that have been modified in the light of the new material are discussed below under Remarks.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD19F2B07F7FD0EFD0931A9" blockId="2.[151,1437,151,717]" pageId="2" pageNumber="275">
|
||
<emphasis id="FAE7DD5EFFD19F2B07F7FD0EFF1F31CD" bold="true" box="[199,254,655,680]" pageId="2" pageNumber="275">Size.</emphasis>
|
||
Small species, adult size range between CW
|
||
<quantity id="0F6BACA9FFD19F2B0434FD0EFC4B31C2" box="[772,938,655,680]" metricMagnitude="-2" metricUnit="m" metricValue="1.95" metricValueMax="2.25" metricValueMin="1.65" pageId="2" pageNumber="275" unit="mm" value="19.5" valueMax="22.5" valueMin="16.5">16.5–22.5 mm</quantity>
|
||
, pubertal moult occurring between CW
|
||
<quantity id="0F6BACA9FFD19F2B0242FD0EFF0931A9" metricMagnitude="-2" metricUnit="m" metricValue="1.65" metricValueMax="1.7" metricValueMin="1.6" pageId="2" pageNumber="275" unit="mm" value="16.5" valueMax="17.0" valueMin="16.0">16– 17 mm</quantity>
|
||
, only known ovigerous female CW
|
||
<quantity id="0F6BACA9FFD19F2B054CFD35FD0231A9" box="[636,739,692,716]" metricMagnitude="-2" metricUnit="m" metricValue="1.9899999999999998" pageId="2" pageNumber="275" unit="mm" value="19.9">19.9 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<caption id="9CEC51C4FFD19F2B07A7F8B7FBCB34CD" httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="2" pageNumber="275" targetBox="[217,1369,772,1822]" targetPageId="2">
|
||
<paragraph id="C82C014CFFD19F2B07A7F8B7FBCB34CD" blockId="2.[151,1436,1846,1960]" pageId="2" pageNumber="275">
|
||
<emphasis id="FAE7DD5EFFD19F2B07A7F8B7FEF5342E" bold="true" box="[151,276,1846,1868]" pageId="2" pageNumber="275">FIGURE 1.</emphasis>
|
||
<taxonomicName id="0F937ACFFFD19F2B062CF8B6FDBE3429" authority="Bott, 1969" authorityName="Bott" authorityYear="1969" box="[284,607,1846,1868]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="2" pageNumber="275" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD19F2B062CF8B6FE373429" box="[284,470,1846,1868]" italics="true" pageId="2" pageNumber="275">Louisea edeaensis</emphasis>
|
||
(Bott, 1969)
|
||
</taxonomicName>
|
||
. Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm.
|
||
</paragraph>
|
||
</caption>
|
||
<caption id="9CEC51C4FFD09F2A07A7FB13FEC23780" httpUri="https://zenodo.org/record/291387/files/figure.png" pageId="3" pageNumber="276" targetBox="[217,1369,193,1149]" targetPageId="3">
|
||
<paragraph id="C82C014CFFD09F2A07A7FB13FEC23780" blockId="3.[151,1436,1170,1253]" pageId="3" pageNumber="276">
|
||
<emphasis id="FAE7DD5EFFD09F2A07A7FB13FEC737C2" bold="true" box="[151,294,1170,1192]" pageId="3" pageNumber="276">FIGURE 2A.</emphasis>
|
||
<taxonomicName id="0F937ACFFFD09F2A061DFB12FD8F37CD" authority="Bott, 1969" authorityName="Bott" authorityYear="1969" box="[301,622,1170,1192]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="276" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD09F2A061DFB12FE0937CD" box="[301,488,1170,1192]" italics="true" pageId="3" pageNumber="276">Louisea edeaensis</emphasis>
|
||
(Bott, 1969)
|
||
</taxonomicName>
|
||
, adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2B is an adult female not presented in the present study.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="C82C014CFFD09F2D07F7FA8DFE4B32ED" blockId="3.[151,1437,1292,2038]" lastBlockId="4.[151,1436,151,392]" lastPageId="4" lastPageNumber="277" pageId="3" pageNumber="276">
|
||
<emphasis id="FAE7DD5EFFD09F2A07F7FA8DFE083640" bold="true" box="[199,489,1292,1317]" pageId="3" pageNumber="276">Growth and size classes.</emphasis>
|
||
Ontogenetic development in our population sample of
|
||
<taxonomicName id="0F937ACFFFD09F2A0366FA8FFB003640" box="[1110,1249,1293,1317]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="276" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD09F2A0366FA8FFB003640" box="[1110,1249,1293,1317]" italics="true" pageId="3" pageNumber="276">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
from Lake Ossa is discussed here in terms of three size categories (juveniles, subadults, and adults) following the criteria proposed by
|
||
<bibRefCitation id="AC027CBDFFD09F2A078BFAD4FE433608" author="Cumberlidge" box="[187,418,1365,1390]" pageId="3" pageNumber="276" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">Cumberlidge (1999)</bibRefCitation>
|
||
. The natural population of
|
||
<taxonomicName id="0F937ACFFFD09F2A05E6FAD7FC803608" box="[726,865,1365,1389]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="276" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD09F2A05E6FAD7FC803608" box="[726,865,1365,1389]" italics="true" pageId="3" pageNumber="276">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
includes male and female specimens in a range of body sizes that are grouped here into: (1) juveniles (small-bodied non-reproductive specimens), (2) sub-adults (medium-sized but non reproductive specimens), and (3) adults (large sexually mature adults). Juveniles of both sexes are characterized by their small size (CW up to
|
||
<quantity id="0F6BACA9FFD09F2A05CFFA40FCB036BC" box="[767,849,1473,1497]" metricMagnitude="-2" metricUnit="m" metricValue="1.1" pageId="3" pageNumber="276" unit="mm" value="11.0">11 mm</quantity>
|
||
) and by the morphological similarity between male and female specimens; both sexes have a similar-shaped abdomen and equal-sized chelipeds, and the gonopods (males) and pleopods (females) are short and undeveloped. The abdomen of juveniles of both sexes is a slim elongated triangle that tapers to a rounded telson and covers only the subabdominal cavity. The G1 and G2 of juvenile males are both short, straight, and similar in size, whereas juvenile females possess four pairs of small, narrow pleopods. Subadult crabs (CW up to
|
||
<quantity id="0F6BACA9FFD09F2A05A3F9F4FD1B35E8" box="[659,762,1653,1678]" metricMagnitude="-2" metricUnit="m" metricValue="1.55" pageId="3" pageNumber="276" unit="mm" value="15.5">15.5 mm</quantity>
|
||
) are characterized by their partial development towards the adult form as a result of allometric (accelerated) growth of the abdomen and pleopods (females) or of the major cheliped and gonopods (males). The abdomen of subadult female crabs is broad and wide but only partially covers the thoracic sternum and is distinctly broader than the slim triangular abdomen of juvenile females and all size classes of male crabs. Although the gonopods of subadult males are long enough to reach sternal segment s6 they are still undeveloped (mostly straight with only a slight outward curve). The abdomen of the only sexually mature adult male (CW
|
||
<quantity id="0F6BACA9FFD09F2A0650F8CCFE2B3400" box="[352,458,1869,1894]" metricMagnitude="-2" metricUnit="m" metricValue="1.75" pageId="3" pageNumber="276" unit="mm" value="17.5">17.5 mm</quantity>
|
||
) from Lake Ossa is slim and triangular covering the narrow subabdominal cavity, whereas the abdomen of adult females is conspicuously wide and covers most of the thoracic sternum and overlaps the coxae of the walking legs (p2–p4). The subabdominal cavity of adult males is deep and narrow and contains the G1 and G2, whereas that of adult females is broad, shallow, and includes four sets of well-developed plumose pleopods for attachment of egg masses. The major cheliped of adult males is distinctly larger than the minor cheliped, and the dactylus is arched so that a distinct space remains between the closed fingers. The chelipeds of females grow isometrically and are not dramatically different from each other in any of the three size classes and one cheliped is not conspicuously enlarged with the respect to the other (as is the case for adult males). The G1 of the adult male is long enough to reach sternal segment s4 (about one third the length of the G1 subterminal segment) (
|
||
<figureCitation id="50A81DC9FFD79F2D063EFEA6FEBA3225" box="[270,347,295,320]" captionStart="FIGURE 3" captionStartId="4.[151,250,1328,1350]" captionTargetBox="[217,1369,445,1307]" captionTargetId="figure@4.[217,1369,445,1307]" captionTargetPageId="4" captionText="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="4" pageNumber="277">Figs. 3</figureCitation>
|
||
A, B), and the terminal article is broad at the base and tapers sharply before curving outward to end in a broad tip, whereas the G2 subterminal segment is long and thin, and the terminal article is long and flagellum-like (
|
||
<figureCitation id="50A81DC9FFD79F2D0675FEEEFE6632ED" box="[325,391,367,392]" captionStart="FIGURE 3" captionStartId="4.[151,250,1328,1350]" captionTargetBox="[217,1369,445,1307]" captionTargetId="figure@4.[217,1369,445,1307]" captionTargetPageId="4" captionText="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="4" pageNumber="277">Fig. 3</figureCitation>
|
||
C).
|
||
</paragraph>
|
||
<caption id="9CEC51C4FFD79F2D07A7FAB1FC413600" httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="4" pageNumber="277" targetBox="[217,1369,445,1307]" targetPageId="4">
|
||
<paragraph id="C82C014CFFD79F2D07A7FAB1FC413600" blockId="4.[151,1435,1328,1381]" pageId="4" pageNumber="277">
|
||
<emphasis id="FAE7DD5EFFD79F2D07A7FAB1FEF43620" bold="true" box="[151,277,1328,1350]" pageId="4" pageNumber="277">FIGURE 3.</emphasis>
|
||
<taxonomicName id="0F937ACFFFD79F2D062EFAB0FD853623" authority="Bott, 1969" authorityName="Bott" authorityYear="1969" box="[286,612,1328,1350]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="4" pageNumber="277" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD79F2D062EFAB0FE8F3623" box="[286,366,1329,1350]" italics="true" pageId="4" pageNumber="277">Louisea</emphasis>
|
||
<emphasis id="FAE7DD5EFFD79F2D0647FAB1FE3B3623" box="[375,474,1328,1350]" italics="true" pageId="4" pageNumber="277">edeaensis</emphasis>
|
||
(Bott, 1969)
|
||
</taxonomicName>
|
||
. Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G1 ventral view; B, G1 dorsal view; C, G2 ventral view. Scale bar equals 3 mm.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="C82C014CFFD79F2D07F7FA13FA72348E" blockId="4.[151,1437,1426,2027]" pageId="4" pageNumber="277">
|
||
The morphological differences shown by the three size classes in
|
||
<taxonomicName id="0F937ACFFFD79F2D0484FA12FBA136CF" box="[948,1088,1426,1450]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="4" pageNumber="277" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD79F2D0484FA12FBA136CF" box="[948,1088,1426,1450]" italics="true" pageId="4" pageNumber="277">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
can be understood in terms of the isometric (proportional) growth and allometric (accelerated) growth shown by some of the important taxonomic characters. All characters in juveniles show only isometric growth, whereas subadult and adult males show different degrees of allometric growth (accelerated development) in the major cheliped and gonopods but not in their abdomen, while subadult females show allometric growth in their pleopods and abdomens (but not in their chelipeds). The boundary between juveniles (with all characters proportional) and subadults is detected when specimens show accelerated growth of their abdomen and pleopods (females) or of their chelipeds and gonopods (males). The boundary between subadults and adults is the pubertal moult from non-reproductive to reproductive animals. This moult is most clearly recognized in females who are considered to be adults when their allometrically growing abdomen has increased to the point where its edges cover the coxae of the walking legs (and their allometrically growing pleopods are long, broad, and feathery, and capable of supporting eggs and or hatchlings). Male and female freshwater crabs go through the pubertal moult at the same size, so the carapace width that signals that a female specimen is an adult can be used to establish whether a male specimen is an adult (but in the absence of an adult female, a male with a conspicuously enlarged major cheliped and well-developed gonopods can be judged to be adult with confidence). The differences between subadult (non-reproductive) and adult (reproductive) freshwater crabs is that although subadult males have enlarged gonopods and a major cheliped in comparison with juveniles, these characters are still only partially developed and have not yet reached the final form seen in adults.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD69F2C07F7FF16FF08339D" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
<emphasis id="FAE7DD5EFFD69F2C07F7FF16FEF133D5" bold="true" box="[199,272,151,176]" pageId="5" pageNumber="278">Color.</emphasis>
|
||
Dorsal carapace (
|
||
<figureCitation id="50A81DC9FFD69F2C06EFFF16FDDA33D5" box="[479,571,151,176]" captionStart="FIGURE 2" captionStartId="3.[151,250,1170,1192]" captionTargetBox="[217,1369,193,1149]" captionTargetId="figure@3.[217,1369,193,1149]" captionTargetPageId="3" captionText="FIGURE 2 A. Louisea edeaensis (Bott, 1969), adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2 B is an adult female not presented in the present study." httpUri="https://zenodo.org/record/291387/files/figure.png" pageId="5" pageNumber="278">Fig. 2A</figureCitation>
|
||
), postfrontal crest, third maxillipeds, chelipeds, walking legs of living adult specimens of
|
||
<taxonomicName id="0F937ACFFFD69F2C0604FF3CFE2033B1" box="[308,449,188,212]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C0604FF3CFE2033B1" box="[308,449,188,212]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
are all red brown, whereas the lateral carapace and sternum are pale brown to creamyellow.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="808952C7FFD69F2C07F7FE85FAAE32ED" pageId="5" pageNumber="278" type="distribution">
|
||
<paragraph id="C82C014CFFD69F2C07F7FE85FAAE32ED" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
<emphasis id="FAE7DD5EFFD69F2C07F7FE85FE813278" bold="true" box="[199,352,260,285]" pageId="5" pageNumber="278">Distribution.</emphasis>
|
||
<taxonomicName id="0F937ACFFFD69F2C065BFE84FDDA3279" box="[363,571,260,284]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C065BFE84FDDA3279" box="[363,571,260,284]" italics="true" pageId="5" pageNumber="278">Louisea edeaensis</emphasis>
|
||
</taxonomicName>
|
||
is endemic to the rainforest zone of southern
|
||
<collectingCountry id="B08441DCFFD69F2C036EFE85FB343279" box="[1118,1237,260,284]" name="Cameroon" pageId="5" pageNumber="278">Cameroon</collectingCountry>
|
||
, where it is now known from an expanded range that includes four localities in the Sanaga (Edea and Lake Ossa), Mfoundi (Yaounde), and Wouri (Yabassi) river basins.
|
||
<taxonomicName id="0F937ACFFFD69F2C0582FECCFC623201" box="[690,899,332,356]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C0582FECCFC623201" box="[690,899,332,356]" italics="true" pageId="5" pageNumber="278">Louisea edeaensis</emphasis>
|
||
</taxonomicName>
|
||
might be expected to occur in other suitable wetland habitats in these river drainages, but this part of Africa is still poorly surveyed for freshwater crabs.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="808952C7FFD69F2F07F7FE15FAF532ED" lastPageId="6" lastPageNumber="279" pageId="5" pageNumber="278" type="discussion">
|
||
<paragraph id="C82C014CFFD69F2C07F7FE15FD2C31CD" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
<emphasis id="FAE7DD5EFFD69F2C07F7FE15FEDA32C8" bold="true" box="[199,315,404,429]" pageId="5" pageNumber="278">Remarks.</emphasis>
|
||
The new series of specimens of
|
||
<taxonomicName id="0F937ACFFFD69F2C059AFE14FCD432C9" box="[682,821,404,428]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C059AFE14FCD432C9" box="[682,821,404,428]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
from Bedimet
|
||
<collectingCountry id="B08441DCFFD69F2C04D0FE15FBC532C8" box="[992,1060,404,429]" name="Iceland" pageId="5" pageNumber="278">Island</collectingCountry>
|
||
in Lake Ossa agree well with the diagnostic character states seen in the
|
||
<typeStatus id="1728BFEEFFD69F2C0566FE36FD5932B5" box="[598,696,439,464]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
from Edea, and with the specimens from Yaounde and Yabassi (
|
||
<bibRefCitation id="AC027CBDFFD69F2C07AEFE5DFE973291" author="Cumberlidge" box="[158,374,476,501]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
,
|
||
<bibRefCitation id="AC027CBDFFD69F2C06B2FE5DFE5F3291" author="Cumberlidge" box="[386,446,476,500]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">1999</bibRefCitation>
|
||
). All have a moderately high carapace (
|
||
<collectingCountry id="B08441DCFFD69F2C04B4FE5DFC4A3291" box="[900,939,476,500]" name="Switzerland" pageId="5" pageNumber="278">CH</collectingCountry>
|
||
/FW 1.0–1.1), a smooth carapace surface; a small and short exorbital tooth; a small epibranchial tooth; one distinct intermediate tooth between the exorbital and epibranchial teeth; a large jagged distal tooth on the medial inferior margin of the cheliped merus; a row of small pointed teeth along the rest of the meral margin; an outwardly-directed G1 terminal article that is broad at the base, tapers sharply and ends in a broad tip; long and flagellum-like G2 terminal article. All specimens are relatively small in size, not exceeding
|
||
<quantity id="0F6BACA9FFD69F2C0575FD11FD7531C2" box="[581,660,656,680]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="5" pageNumber="278" unit="mm" value="20.0">20 mm</quantity>
|
||
CW.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD69F2C07F7FD35FDEC373D" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
The new specimens of
|
||
<taxonomicName id="0F937ACFFFD69F2C06FFFD34FDBA31A9" box="[463,603,692,716]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C06FFFD34FDBA31A9" box="[463,603,692,716]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
allow a more detailed examination of several other important taxonomic characters that have been described differently by
|
||
<bibRefCitation id="AC027CBDFFD69F2C05CFFD56FC053195" author="Cumberlidge" box="[767,996,727,752]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge (1994</bibRefCitation>
|
||
,
|
||
<bibRefCitation id="AC027CBDFFD69F2C04C6FD59FBD33195" author="Cumberlidge" box="[1014,1074,728,752]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">1999</bibRefCitation>
|
||
). The mandibular palp of the specimens from Lake Ossa and the specimen from Yabassi (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C0472FD7DFBFA3071" author="Cumberlidge" box="[834,1051,764,789]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 3d”) have a small but distinct lobe at the junction between the terminal and subterminal segments (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C0490FC9EFB98305D" author="Cumberlidge" box="[928,1145,799,824]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 2F”) which is similar to the
|
||
<typeStatus id="1728BFEEFFD69F2C07D2FCC5FEA63038" box="[226,327,836,861]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
, although it was described by
|
||
<bibRefCitation id="AC027CBDFFD69F2C0599FCC5FC6E3039" author="Cumberlidge" box="[681,911,836,861]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge (1994)</bibRefCitation>
|
||
as ‘a rudimentary flange at junction between segments’. The third maxilliped ischium of the specimens from Lake Ossa has a distinct vertical groove (
|
||
<figureCitation id="50A81DC9FFD69F2C0206FCE6FA9730E5" box="[1334,1398,871,896]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="5" pageNumber="278">Fig. 1</figureCitation>
|
||
C), which is clearer than that of the
|
||
<typeStatus id="1728BFEEFFD69F2C0520FC0DFD9330C0" box="[528,626,908,933]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
and the specimens from Yabassi which have a faint or absent vertical groove (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C07CFFC2EFE0130AD" author="Cumberlidge" box="[255,480,943,968]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge, 1994</bibRefCitation>
|
||
: figs. 1c, 3c”). The
|
||
<typeStatus id="1728BFEEFFD69F2C05F3FC2EFCC430AD" box="[707,805,943,968]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
of
|
||
<taxonomicName id="0F937ACFFFD69F2C047DFC30FC3830AD" box="[845,985,944,968]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C047DFC30FC3830AD" box="[845,985,944,968]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
(“
|
||
<bibRefCitation id="AC027CBDFFD69F2C04C3FC2EFB3430AD" author="Cumberlidge" box="[1011,1237,943,968]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge, 1994</bibRefCitation>
|
||
: fig. 1a, b”) from Edea and the specimens from Lake Ossa both have a faint postfrontal crest (
|
||
<figureCitation id="50A81DC9FFD69F2C033AFC55FB843089" box="[1034,1125,980,1005]" captionStart="FIGURE 2" captionStartId="3.[151,250,1170,1192]" captionTargetBox="[217,1369,193,1149]" captionTargetId="figure@3.[217,1369,193,1149]" captionTargetPageId="3" captionText="FIGURE 2 A. Louisea edeaensis (Bott, 1969), adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2 B is an adult female not presented in the present study." httpUri="https://zenodo.org/record/291387/files/figure.png" pageId="5" pageNumber="278">Fig. 2A</figureCitation>
|
||
) that on close examination extends as far as the epibranchial teeth, which is a character state that agrees with that of the Yabassi specimens, despite the fact that those specimens were illustrated with a complete and distinct postfrontal crest by “
|
||
<bibRefCitation id="AC027CBDFFD69F2C0791FBBEFE63373D" author="Cumberlidge" box="[161,386,1087,1112]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge (1994</bibRefCitation>
|
||
: fig. 2a, b)”.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD69F2C07F7FBE5FC6A36A5" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
The
|
||
<typeStatus id="1728BFEEFFD69F2C07CCFBE5FEBF3718" box="[252,350,1124,1149]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
of
|
||
<taxonomicName id="0F937ACFFFD69F2C06BAFBE4FDF63719" box="[394,535,1124,1148]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C06BAFBE4FDF63719" box="[394,535,1124,1148]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
from Edea (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C0585FBE5FC703719" author="Cumberlidge" box="[693,913,1124,1149]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 1a, b”) and the specimens from Yabassi (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C0798FB06FE6337C5" author="Cumberlidge" box="[168,386,1159,1184]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 2a, b”) and Lake Ossa (
|
||
<figureCitation id="50A81DC9FFD69F2C05F2FB06FCFB37C5" box="[706,794,1159,1184]" captionStart="FIGURE 2" captionStartId="3.[151,250,1170,1192]" captionTargetBox="[217,1369,193,1149]" captionTargetId="figure@3.[217,1369,193,1149]" captionTargetPageId="3" captionText="FIGURE 2 A. Louisea edeaensis (Bott, 1969), adult male, CW 17.5 mm: Lake Ossa, Cameroon (ZMB Crust. 26930). Dorsal view showing color when freshly collected. Scale bar equals 11 mm. The figure 2 B is an adult female not presented in the present study." httpUri="https://zenodo.org/record/291387/files/figure.png" pageId="5" pageNumber="278">Fig. 2A</figureCitation>
|
||
) differ from each other in a few respects. The first carpal tooth of the cheliped of the
|
||
<typeStatus id="1728BFEEFFD69F2C06F9FB2DFDCA37A0" box="[457,555,1196,1221]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
is smaller than the second carpal tooth (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C04C3FB2DFB2D37A1" author="Cumberlidge" box="[1011,1228,1196,1221]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 1a”), whereas in the specimens from Yabassi (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C053EFB4EFD0B378D" author="Cumberlidge" box="[526,746,1231,1256]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 3f”) and in the specimens from Lake Ossa, the tooth is large, triangular, and larger than the second carpal tooth (
|
||
<figureCitation id="50A81DC9FFD69F2C0427FB75FCB63669" box="[791,855,1268,1293]" captionStart="FIGURE 1" captionStartId="2.[151,250,1846,1868]" captionTargetBox="[217,1369,772,1822]" captionTargetId="figure@2.[217,1369,772,1822]" captionTargetPageId="2" captionText="FIGURE 1. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, right carpus showing the first (top) and second carpal teeth; B, right merus showing the inferior margin with the large distal tooth and the toothed margin; C, third maxillipeds showing vertical groove on ischium and the absence of a flagellum on the exopod; D, left mandible showing the small lobe at the junction of segments. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291386/files/figure.png" pageId="5" pageNumber="278">Fig. 1</figureCitation>
|
||
A). It is possible that the
|
||
<typeStatus id="1728BFEEFFD69F2C0344FB75FB373668" box="[1140,1238,1268,1293]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
is atypical in this respect and that its first carpal tooth has been damaged making it appear smaller than it actually is. Furthermore, the G1 of both the
|
||
<typeStatus id="1728BFEEFFD69F2C0657FABDFE283630" box="[359,457,1340,1365]" pageId="5" pageNumber="278" type="holotype">holotype</typeStatus>
|
||
of
|
||
<taxonomicName id="0F937ACFFFD69F2C06DEFABCFD993631" box="[494,632,1340,1364]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C06DEFABCFE1C3631" box="[494,509,1341,1364]" italics="true" pageId="5" pageNumber="278">L</emphasis>
|
||
.
|
||
<emphasis id="FAE7DD5EFFD69F2C053BFABDFD993631" box="[523,632,1340,1364]" italics="true" pageId="5" pageNumber="278">edeaensis</emphasis>
|
||
</taxonomicName>
|
||
from Edea (“
|
||
<bibRefCitation id="AC027CBDFFD69F2C043BFABDFC053631" author="Cumberlidge" box="[779,996,1340,1365]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge 1994</bibRefCitation>
|
||
: fig. 1h”) and the specimens from Lake Ossa have a broad rectangular dorsal membrane at the junction between the subterminal segment and the terminal article (
|
||
<figureCitation id="50A81DC9FFD69F2C07DDFA05FED036F9" box="[237,305,1412,1437]" captionStart="FIGURE 3" captionStartId="4.[151,250,1328,1350]" captionTargetBox="[217,1369,445,1307]" captionTargetId="figure@4.[217,1369,445,1307]" captionTargetPageId="4" captionText="FIGURE 3. Louisea edeaensis (Bott, 1969). Lake Ossa, Cameroon, adult male, CW 17.5 mm (ZMB Crust. 26930). A, G 1 ventral view; B, G 1 dorsal view; C, G 2 ventral view. Scale bar equals 3 mm." httpUri="https://zenodo.org/record/291388/files/figure.png" pageId="5" pageNumber="278">Fig. 3</figureCitation>
|
||
A, B), but this membrane is not shown at all in the G1 of the specimen from Yabassi illustrated by “
|
||
<bibRefCitation id="AC027CBDFFD69F2C0791FA26FE3A36A5" author="Cumberlidge" box="[161,475,1447,1472]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994" yearSuffix="i">
|
||
Cumberlidge (1994: fig.
|
||
<date id="BC2D278CFFD69F2C068AFA26FE3036A5" box="[442,465,1447,1472]" pageId="5" pageNumber="278">3i</date>
|
||
)
|
||
</bibRefCitation>
|
||
”, which may well be an artwork error.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD69F2C07F7FA4DFB2734F0" blockId="5.[151,1437,151,2013]" pageId="5" pageNumber="278">
|
||
The present work brings into question the diagnostic characters used by
|
||
<bibRefCitation id="AC027CBDFFD69F2C0321FA4DFB163681" author="Cumberlidge" box="[1041,1271,1484,1509]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">Cumberlidge (1999)</bibRefCitation>
|
||
to distinguish between
|
||
<taxonomicName id="0F937ACFFFD69F2C07CCFA70FE68356D" box="[252,393,1520,1544]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C07CCFA70FE68356D" box="[252,393,1520,1544]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="0F937ACFFFD69F2C06F2FA70FDC3356D" box="[450,546,1520,1544]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="balssi">
|
||
<emphasis id="FAE7DD5EFFD69F2C06F2FA70FDC3356D" box="[450,546,1520,1544]" italics="true" pageId="5" pageNumber="278">L. balssi</emphasis>
|
||
</taxonomicName>
|
||
(such as differences in the relative size of the first carpal tooth, and a distinct and complete vs. faint and incomplete postfrontal crest) and creates the need to update the key to the species of
|
||
<taxonomicName id="0F937ACFFFD69F2C07A7F9B9FF11352A" box="[151,240,1592,1615]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="FAE7DD5EFFD69F2C07A7F9B9FF11352A" box="[151,240,1592,1615]" italics="true" pageId="5" pageNumber="278">Louisea</emphasis>
|
||
</taxonomicName>
|
||
provided by
|
||
<bibRefCitation id="AC027CBDFFD69F2C06B9F9B6FD903535" author="Cumberlidge" box="[393,625,1591,1616]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">Cumberlidge (1999)</bibRefCitation>
|
||
. These latter two morphological differences led
|
||
<bibRefCitation id="AC027CBDFFD69F2C03A9F9B6FA9F3535" author="Cumberlidge" box="[1177,1406,1591,1616]" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1999) The Freshwater Crabs of West Africa, Family Potamonautidae. Faune et Flore tropicales 35, IRD, Paris, pp. 1 - 382." type="journal article" year="1999">Cumberlidge (1999)</bibRefCitation>
|
||
to tentatively include the specimens from Yabassi under
|
||
<taxonomicName id="0F937ACFFFD69F2C05C3F9DCFCB03511" box="[755,849,1628,1652]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="balssi">
|
||
<emphasis id="FAE7DD5EFFD69F2C05C3F9DCFCB03511" box="[755,849,1628,1652]" italics="true" pageId="5" pageNumber="278">L. balssi</emphasis>
|
||
</taxonomicName>
|
||
, but it now appears that in the light of new evidence the specimens from Yabassi properly belong to
|
||
<taxonomicName id="0F937ACFFFD69F2C0583F900FCDE35FD" box="[691,831,1664,1688]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C0583F900FCDE35FD" box="[691,831,1664,1688]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
, an opinion which is in agreement with
|
||
<bibRefCitation id="AC027CBDFFD69F2C023AF9FEFF0535D9" author="Cumberlidge" pageId="5" pageNumber="278" refString="Cumberlidge, N. (1994) Louisea, a new genus of fresh-water crab (Brachyura, Potamoidea, Potamonautidae) for Globonautes macropus edeaensis Bott, 1969 from Cameroon. Proceedings of the Biological Society of Washington, 107, 122 - 131." type="journal article" year="1994">Cumberlidge (1994)</bibRefCitation>
|
||
. In summary, the postfrontal crest of
|
||
<taxonomicName id="0F937ACFFFD69F2C05B9F924FCF235D9" box="[649,787,1700,1724]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C05B9F924FCF235D9" box="[649,787,1700,1724]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
is faint and completely crosses the carapace, and the first carpal tooth of the cheliped is larger than the second carpal tooth. Despite this, we are unable to discuss in detail the taxonomic status of
|
||
<taxonomicName id="0F937ACFFFD69F2C06B7F96CFE0B3461" box="[391,490,1772,1796]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="balssi">
|
||
<emphasis id="FAE7DD5EFFD69F2C06B7F96CFE0B3461" box="[391,490,1772,1796]" italics="true" pageId="5" pageNumber="278">L. balssi</emphasis>
|
||
</taxonomicName>
|
||
, due to a lack of new material and the fact that the only known specimens are juveniles collected in 1907, which are all in poor condition and no information on the gonopod is available. Comparisons of
|
||
<taxonomicName id="0F937ACFFFD69F2C0664F8B4FE013429" box="[340,480,1844,1868]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C0664F8B4FE013429" box="[340,480,1844,1868]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="0F937ACFFFD69F2C052BF8B4FD9A3429" box="[539,635,1844,1868]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="balssi">
|
||
<emphasis id="FAE7DD5EFFD69F2C052BF8B4FD9A3429" box="[539,635,1844,1868]" italics="true" pageId="5" pageNumber="278">L. balssi</emphasis>
|
||
</taxonomicName>
|
||
must therefore await future collection of more specimens of
|
||
<taxonomicName id="0F937ACFFFD69F2C020BF8B4FA7D3429" box="[1339,1436,1844,1868]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="balssi">
|
||
<emphasis id="FAE7DD5EFFD69F2C020BF8B4FA7D3429" box="[1339,1436,1844,1868]" italics="true" pageId="5" pageNumber="278">L. balssi</emphasis>
|
||
</taxonomicName>
|
||
that will hopefully include an adult male specimen suitable for morphological studies, and that will also provide fresh tissue for the inclusion of this rare and enigmatic taxon in molecular phylogenetic studies.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD69F2F07F7F821FAF532ED" blockId="5.[151,1437,151,2013]" lastBlockId="6.[151,1437,151,1805]" lastPageId="6" lastPageNumber="279" pageId="5" pageNumber="278">
|
||
<emphasis id="FAE7DD5EFFD69F2C07F7F821FECB34DC" bold="true" box="[199,298,1952,1977]" pageId="5" pageNumber="278">Habitat.</emphasis>
|
||
The Lake Ossa complex comprises nine lakes and over twenty islands (including Bedimet
|
||
<collectingCountry id="B08441DCFFD69F2C0268F821FA7D34DC" box="[1368,1436,1952,1977]" name="Iceland" pageId="5" pageNumber="278">Island</collectingCountry>
|
||
(550 ha), where
|
||
<taxonomicName id="0F937ACFFFD69F2C066DF844FE0D34B9" box="[349,492,1988,2012]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="278" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD69F2C066DF844FE0D34B9" box="[349,492,1988,2012]" italics="true" pageId="5" pageNumber="278">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
was collected) and is part of the Lake Ossa Wildlife Reserve, a protected area managed for mammals and birds, but not for freshwater invertebrates. Lake Ossa lies in the tropical rain forest zone in the wettest region of Southwest
|
||
<collectingCountry id="B08441DCFFD59F2F051BFF3DFD4133B1" box="[555,672,188,212]" name="Cameroon" pageId="6" pageNumber="279">Cameroon</collectingCountry>
|
||
and receives more than
|
||
<quantity id="0F6BACA9FFD59F2F048EFF3DFBD333B1" box="[958,1074,188,212]" metricMagnitude="0" metricUnit="m" metricValue="3.0" pageId="6" pageNumber="279" unit="mm" value="3000.0">3,000 mm</quantity>
|
||
of rainfall annually (
|
||
<bibRefCitation id="AC027CBDFFD59F2F0218FF3DFF32339D" author="Wirrmann" pageId="6" pageNumber="279" refString="Wirrmann, D. (1992) Le lac Ossa: une monographie preliminaire. Revue Geographie du Cameroun, 11, 1, 28 - 38." type="journal article" year="1992">Wirrmann 1992</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="AC027CBDFFD59F2F07D2FF5EFDCE339D" author="Reynaud-Farrera" box="[226,559,223,248]" pageId="6" pageNumber="279" refString="Reynaud-Farrera, I., Maley, J. & Wirrmann, D. (1996) Vegetation et climat dans les forets du sud-ouest Cameroun depuis 4 770 ans BP: analyse pollinique des sediments du Lac Ossa. Comptes Rendus de l'Academie des Sciences, Paris, 322, 749 - 755." type="journal article" year="1996">
|
||
Reynaud-Farrera
|
||
<emphasis id="FAE7DD5EFFD59F2F069BFF60FE00339D" box="[427,481,224,248]" italics="true" pageId="6" pageNumber="279">et al</emphasis>
|
||
. 1996
|
||
</bibRefCitation>
|
||
). The extensive aquatic habitats in the Lake Ossa complex are drained by numerous streams that flow via a series of lakes into the Sanaga River (
|
||
<bibRefCitation id="AC027CBDFFD59F2F0489FE85FB1A3278" author="Reynaud-Farrera" box="[953,1275,260,285]" pageId="6" pageNumber="279" refString="Reynaud-Farrera, I., Maley, J. & Wirrmann, D. (1996) Vegetation et climat dans les forets du sud-ouest Cameroun depuis 4 770 ans BP: analyse pollinique des sediments du Lac Ossa. Comptes Rendus de l'Academie des Sciences, Paris, 322, 749 - 755." type="journal article" year="1996">
|
||
Reynaud-Farrera
|
||
<emphasis id="FAE7DD5EFFD59F2F03B0FE84FB503279" box="[1152,1201,260,284]" italics="true" pageId="6" pageNumber="279">et al</emphasis>
|
||
. 1996
|
||
</bibRefCitation>
|
||
). Although no month is consistently devoid of rain, a dry season (December to March) and a rainy season (April to September) are clearly distinguishable (
|
||
<bibRefCitation id="AC027CBDFFD59F2F06FCFECDFDBB3200" author="Olivry" box="[460,602,332,357]" pageId="6" pageNumber="279" refString="Olivry, J. C. (1986) Fleuves et Rivieres du Cameroun. Collection monographie hydrologies, ORSTOM, pp. 1 - 781." type="book chapter" year="1986">Olivry 1986</bibRefCitation>
|
||
). Air temperatures show no great seasonal variation with average monthly maxima between 27°C and 35°C, and average monthly minima between 21°C and 25°C (
|
||
<bibRefCitation id="AC027CBDFFD59F2F03B1FEEEFAE932ED" author="Olivry" box="[1153,1288,367,392]" pageId="6" pageNumber="279" refString="Olivry, J. C. (1986) Fleuves et Rivieres du Cameroun. Collection monographie hydrologies, ORSTOM, pp. 1 - 781." type="book chapter" year="1986">Olivry1986</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="808952C7FFD59F2F07F7FE14FA7C3468" pageId="6" pageNumber="279" type="description">
|
||
<paragraph id="C82C014CFFD59F2F07F7FE14FE9F3750" blockId="6.[151,1437,151,1805]" pageId="6" pageNumber="279">
|
||
<taxonomicName id="0F937ACFFFD59F2F07F7FE14FE7532C9" box="[199,404,404,428]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F07F7FE14FE7532C9" box="[199,404,404,428]" italics="true" pageId="6" pageNumber="279">Louisea edeaensis</emphasis>
|
||
</taxonomicName>
|
||
appears to prefer temporary water bodies such as puddles near small permanent streams as well as the damp conditions under fallen leaves on land adjacent to streams, and it is noteworthy that no specimens were found in nearby streams with a year-round flow. A number of threats to the continued survival of
|
||
<taxonomicName id="0F937ACFFFD59F2F0222FE5CFA7D3291" box="[1298,1436,476,500]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F0222FE5CFA7D3291" box="[1298,1436,476,500]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
were identified during this study including those that impact its habitat. Many parts of Bedimet
|
||
<collectingCountry id="B08441DCFFD59F2F03ECFE7EFAC1317D" box="[1244,1312,511,536]" name="Iceland" pageId="6" pageNumber="279">Island</collectingCountry>
|
||
(including the locality where this species was collected) have been cleared of natural forest cover to make way for agriculture with the result that the vegetation is now dominated by shade-tolerant tropical plants of the family
|
||
<taxonomicName id="0F937ACFFFD59F2F03DEFDC6FA7D3105" box="[1262,1436,583,608]" class="Magnoliopsida" family="Amaranthaceae" kingdom="Plantae" order="Caryophyllales" pageId="6" pageNumber="279" phylum="Tracheophyta" rank="family">Amaranthaceae</taxonomicName>
|
||
that grow well in moist soils, cultivated fields, and wastelands. Apart from the substantial disturbance of the original vegetation on Bedimet
|
||
<collectingCountry id="B08441DCFFD59F2F06CBFD0EFDA331CD" box="[507,578,655,680]" name="Iceland" pageId="6" pageNumber="279">Island</collectingCountry>
|
||
, pesticides applied to the crops may drain into the aquatic habitats inhabited by
|
||
<taxonomicName id="0F937ACFFFD59F2F0789FD34FEA231A9" box="[185,323,692,716]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F0789FD34FEA231A9" box="[185,323,692,716]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
, which could well have a serious impact on this species. Furthermore, the clearing of original forest cover has exposed the aquatic systems on Bedimet
|
||
<collectingCountry id="B08441DCFFD59F2F05E4FD56FCF93195" box="[724,792,727,752]" name="Iceland" pageId="6" pageNumber="279">Island</collectingCountry>
|
||
(and the freshwater invertebrates that live there) to direct sunlight, and this is reflected in the high average daytime water temperatures of up to 30°C recorded during this study (compared to average water temperatures in streams shaded by forest cover of between 22–26°C). In addition, our water chemistry data indicate that the marginal aquatic habitats on Bedimet
|
||
<collectingCountry id="B08441DCFFD59F2F03A8FCC5FB3D3038" box="[1176,1244,836,861]" name="Iceland" pageId="6" pageNumber="279">Island</collectingCountry>
|
||
have a very low average
|
||
<collectingCountry id="B08441DCFFD59F2F07C6FCE9FEF9301A" box="[246,280,872,895]" name="Philippines" pageId="6" pageNumber="279">pH</collectingCountry>
|
||
of 4.5, indicating seriously acidic conditions at these localities well outside of the preferred
|
||
<collectingCountry id="B08441DCFFD59F2F0204FCE9FAB7301A" box="[1332,1366,872,895]" name="Philippines" pageId="6" pageNumber="279">pH</collectingCountry>
|
||
range (6.5–9.0) for most freshwater organisms (
|
||
<bibRefCitation id="AC027CBDFFD59F2F0544FC0DFC6830C1" author="Robertson-Brayan" box="[628,905,908,933]" pageId="6" pageNumber="279" refString="Robertson-Brayan, Inc. (2004) Ph Requirements of Freshwater Aquatic Life. Published by the company." type="book" year="2004">Robertson-Brayan 2004</bibRefCitation>
|
||
). This is of concern because acidic conditions may influence hatching and survival of
|
||
<taxonomicName id="0F937ACFFFD59F2F056EFC30FD0B30AD" box="[606,746,944,968]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F056EFC30FD0B30AD" box="[606,746,944,968]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
and other aquatic invertebrates whose larval and/or juvenile stages are often more sensitive to low
|
||
<collectingCountry id="B08441DCFFD59F2F056CFC54FD9F3089" box="[604,638,981,1004]" name="Philippines" pageId="6" pageNumber="279">pH</collectingCountry>
|
||
than are the adults. The immediate threats from habitat disturbance, altered water chemistry, and pollution all clearly raise questions about the long-term existence of
|
||
<taxonomicName id="0F937ACFFFD59F2F03C3FC78FA9E3775" box="[1267,1407,1016,1040]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F03C3FC78FA9E3775" box="[1267,1407,1016,1040]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
at this specific locality.
|
||
</paragraph>
|
||
<paragraph id="C82C014CFFD59F2F07F7FBBEFA7C3468" blockId="6.[151,1437,151,1805]" pageId="6" pageNumber="279">
|
||
<emphasis id="FAE7DD5EFFD59F2F07F7FBBEFE5A373D" bold="true" box="[199,443,1087,1112]" pageId="6" pageNumber="279">Conservation status.</emphasis>
|
||
The extinction risk status of
|
||
<taxonomicName id="0F937ACFFFD59F2F0431FBC0FC6D373D" box="[769,908,1088,1112]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F0431FBC0FC6D373D" box="[769,908,1088,1112]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
was assessed in 2008 (
|
||
<bibRefCitation id="AC027CBDFFD59F2F03BEFBBEFA97373D" author="Cumberlidge" box="[1166,1398,1087,1112]" pageId="6" pageNumber="279" refString="Cumberlidge, N. (2008 a) Louisea edeaensis. The IUCN Red List of Threatened Species 2008: e. T 12383 A 3339062. http: // dx. doi. org / 10.2305 / IUCN. UK. 2008. RLTS. T 12383 A 3339062. en" type="journal article" year="2008" yearSuffix="a">Cumberlidge, 2008a</bibRefCitation>
|
||
) as EN B1ab (i,ii,iii,iv,v) at a time when this species was known only from just two localities and had not been collected for over 100 years (
|
||
<bibRefCitation id="AC027CBDFFD59F2F0534FB09FD7237C5" author="IUCN" box="[516,659,1160,1184]" pageId="6" pageNumber="279" refString="IUCN, (2003) IUCN Species Survival Commission (2012) IUCN Red List categories and criteria. Version 3.1, 2 nd edn. IUCN, Gland, Switzerland." type="book chapter" year="2003">IUCN 2003</bibRefCitation>
|
||
, Cumberlidge 2011;
|
||
<bibRefCitation id="AC027CBDFFD59F2F04A4FB06FB2137C5" author="Cumberlidge" box="[916,1216,1159,1184]" pageId="6" pageNumber="279" refString="Cumberlidge, N., Ng, P. K. L., Yeo, D. C. J., Magalhaes, C., Campos, M. R., Alvarez, F., Naruse, T., Daniels, S. R., Esser, L. J., Attipoe, F. Y. K., Clotilde-Ba, F. L., Darwall, W., McIvor, A., Ram, M. & Collen, B. (2009) Freshwater crabs and the biodiversity crisis: importance, threats, status, and conservation challenges. Biological Conservation, 142, 1665 - 1673. https: // doi. org / 10.1016 / j. biocon. 2009.02.038" type="journal article" year="2009">
|
||
Cumberlidge
|
||
<emphasis id="FAE7DD5EFFD59F2F0305FB08FB8F37C5" box="[1077,1134,1160,1184]" italics="true" pageId="6" pageNumber="279">et al</emphasis>
|
||
. 2009
|
||
</bibRefCitation>
|
||
). Specifically, this extinction risk assessment meant that
|
||
<taxonomicName id="0F937ACFFFD59F2F0564FB2CFD0337A1" box="[596,738,1196,1220]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F0564FB2CFD0337A1" box="[596,738,1196,1220]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
was known from less than five locations, had an extent of occurrence (EOO) of less than
|
||
<quantity id="0F6BACA9FFD59F2F06C2FB53FDB4378E" box="[498,597,1234,1259]" metricMagnitude="6" metricUnit="m" metricValue="5.0" pageId="6" pageNumber="279" unit="km" value="5000.0">5000 km</quantity>
|
||
2, and that its EOO, area of occupancy (AOO), and the number of locations were in continuing decline, as were the quality of its habitat and the number of mature individuals (
|
||
<bibRefCitation id="AC027CBDFFD59F2F0238FB77FF013656" author="Cumberlidge" pageId="6" pageNumber="279" refString="Cumberlidge, N. (2008 a) Louisea edeaensis. The IUCN Red List of Threatened Species 2008: e. T 12383 A 3339062. http: // dx. doi. org / 10.2305 / IUCN. UK. 2008. RLTS. T 12383 A 3339062. en" type="journal article" year="2008" yearSuffix="a">Cumberlidge 2008a</bibRefCitation>
|
||
). The present study adds two new locations for
|
||
<taxonomicName id="0F937ACFFFD59F2F05CFFA9AFC6B3656" box="[767,906,1307,1331]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="species" species="edeaensis">
|
||
<emphasis id="FAE7DD5EFFD59F2F05CFFA9AFC6B3656" box="[767,906,1307,1331]" italics="true" pageId="6" pageNumber="279">L. edeaensis</emphasis>
|
||
</taxonomicName>
|
||
(one from 1908/1909 and one from 2015) and these four locations allow the calculation of a revised geographic range estimated by using the EOO (the area contained within the minimum convex polygon around all sites of present occurrence) and the AOO (the area within the EOO that is actually occupied by the taxon). The EOO and AOO measurements from point locality data using GeoCAT (http://geocat.kew.org;
|
||
<bibRefCitation id="AC027CBDFFD59F2F057BFA2CFCD436A3" author="Bachman" box="[587,821,1453,1478]" pageId="6" pageNumber="279" refString="Bachman, S., Moat, J., Hill, A. W., de Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys, 150, 117 - 126." type="journal article" year="2011">
|
||
Bachman
|
||
<emphasis id="FAE7DD5EFFD59F2F058CFA2FFD0F36A0" box="[700,750,1453,1477]" italics="true" pageId="6" pageNumber="279">et al</emphasis>
|
||
. 2011
|
||
</bibRefCitation>
|
||
) give a revised EOO of
|
||
<quantity id="0F6BACA9FFD59F2F0379FA2CFB5B36A3" box="[1097,1210,1453,1478]" metricMagnitude="6" metricUnit="m" metricValue="6.779999999999999" pageId="6" pageNumber="279" unit="km" value="6780.0">6, 780 km</quantity>
|
||
2 and an AOO of
|
||
<quantity id="0F6BACA9FFD59F2F02B0FA2CFF5A3688" metricMagnitude="4" metricUnit="m" metricValue="1.6" pageId="6" pageNumber="279" unit="km" value="16.0">16 km</quantity>
|
||
2 (estimated by overlaying a 2 ×
|
||
<quantity id="0F6BACA9FFD59F2F0502FA54FD8C3688" box="[562,621,1492,1517]" metricMagnitude="3" metricUnit="m" metricValue="2.0" pageId="6" pageNumber="279" unit="km" value="2.0">2 km</quantity>
|
||
grid and summing the area of occupied cells). If considered alone, this EOO would assign this species to either the vulnerable (VU) or EN categories. Given the new knowledge of its specific habitat requirements and the existence of immediate threats to its habitat, however, this species is more likely to be upgraded to critical (CR) once a formal IUCN Red List extinction risk assessment has been carried out. The newly-reported threats to an already endangered species area cause for concern and they underline the need for further studies of this species. This concern is especially important, because recent systematic attempts to collect specimens of
|
||
<taxonomicName id="0F937ACFFFD59F2F0606F92CFE6E35A1" box="[310,399,1709,1732]" class="Malacostraca" family="Potamonautidae" genus="Louisea" kingdom="Animalia" order="Decapoda" pageId="6" pageNumber="279" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="FAE7DD5EFFD59F2F0606F92CFE6E35A1" box="[310,399,1709,1732]" italics="true" pageId="6" pageNumber="279">Louisea</emphasis>
|
||
</taxonomicName>
|
||
from the
|
||
<typeStatus id="1728BFEEFFD59F2F0534F92CFDD535A0" box="[516,564,1709,1733]" pageId="6" pageNumber="279">type</typeStatus>
|
||
locality at Edea (last collected in 1910) and from Yabassi (last collected in 1907) during this campaign were unsuccessful. There is clearly a need for further field research aimed at gathering data needed to develop a conservation action plan in order to save this rare and endangered species from extinction.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |