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<document id="138ABB56B4F1A48967A8B92C2175BC29" ID-CLB-Dataset="36914" ID-DOI="10.11646/zootaxa.3754.1.1" ID-GBIF-Dataset="ba5ecbcd-2257-462e-a7e5-312167e67797" ID-ISSN="1175-5326" ID-Zenodo-Dep="285405" ID-ZooBank="F25E1C18-DBFF-408C-9A95-A2C3025D5343" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460367367696" checkinUser="plazi" docAuthor="Myers, A. A." docDate="2014" docId="7E0E87B8E5161145FF7FFCEF7E6B46F6" docLanguage="en" docName="zt03754p031.pdf" docOrigin="Zootaxa 3754 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Elasmopus ora Myers, 2014, sp. nov." docType="treatment" docVersion="7" lastPageNumber="5" masterDocId="8237FFC0E5121141FFE8FFF07D77412D" masterDocTitle="Amphipoda (Crustacea) from the Chagos Archipelago" masterLastPageNumber="31" masterPageNumber="1" pageNumber="5" updateTime="1698295338162" updateUser="ExternalLinkService">
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<mods:title id="CE58401A5371A0F3BDC05A672228F106">Amphipoda (Crustacea) from the Chagos Archipelago</mods:title>
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<mods:namePart id="3BE789480A440BE120897684317EAE9D">Myers, A. A.</mods:namePart>
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<mods:date id="73C217E020F17FC83E94097749918C9F">2014</mods:date>
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<treatment id="7E0E87B8E5161145FF7FFCEF7E6B46F6" ID-GBIF-Taxon="127666810" LSID="urn:lsid:plazi:treatment:7E0E87B8E5161145FF7FFCEF7E6B46F6" httpUri="http://treatment.plazi.org/id/7E0E87B8E5161145FF7FFCEF7E6B46F6" lastPageNumber="5" pageId="4" pageNumber="5">
<subSubSection id="BEBD6525E5161145FF7FFCEF7C7C4276" pageId="4" pageNumber="5" type="nomenclature">
<paragraph id="F61836AEE5161145FF7FFCEF7CC64217" blockId="4.[151,433,799,859]" box="[151,433,799,826]" pageId="4" pageNumber="5">
<heading id="AD5081C2E5161145FF7FFCEF7CC64217" bold="true" box="[151,433,799,826]" fontSize="11" level="1" pageId="4" pageNumber="5" reason="1">
<emphasis id="C4D3EABCE5161145FF7FFCEF7CC64217" bold="true" box="[151,433,799,826]" pageId="4" pageNumber="5">
<taxonomicName id="31A74D2DE5161145FF7FFCEF7C3A4214" box="[151,333,799,825]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="ora" status="sp. nov.">
<emphasis id="C4D3EABCE5161145FF7FFCEF7C3A4214" bold="true" box="[151,333,799,825]" italics="true" pageId="4" pageNumber="5">Elasmopus ora</emphasis>
</taxonomicName>
<taxonomicNameLabel id="DFE057C7E5161145FEBCFCD07CC64217" box="[340,433,800,826]" pageId="4" pageNumber="5" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="F61836AEE5161145FF7FFCB27C7C4276" blockId="4.[151,433,799,859]" box="[151,267,834,859]" pageId="4" pageNumber="5">
(
<figureCitation id="6E9C2A2BE5161145FF77FCB27D904276" box="[159,231,834,859]" captionStart="FIGURE 4" captionStartId="5.[151,250,1925,1947]" captionTargetBox="[169,1424,211,1901]" captionTargetId="figure@5.[155,1432,195,1903]" captionTargetPageId="5" captionText="FIGURE 4. Elasmopus ora sp. nov., male, holotype, 4.6 mm, female, paratype, 4.5 mm, Great Chagos Bank." httpUri="https://zenodo.org/record/285409/files/figure.png" pageId="4" pageNumber="5">Figs 4</figureCitation>
,
<figureCitation id="6E9C2A2BE5161145FF1BFCB27C764276" box="[243,257,834,859]" captionStart="FIGURE 5" captionStartId="6.[151,250,1829,1851]" captionTargetBox="[155,1433,198,1797]" captionTargetId="figure@6.[151,1435,193,1807]" captionTargetPageId="6" captionText="FIGURE 5. Elasmopus ora sp nov., male, holotype, 4.6 mm, Great Chagos Bank." httpUri="https://zenodo.org/record/285410/files/figure.png" pageId="4" pageNumber="5">5</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="BEBD6525E5161145FF7FFC7A7F1742C6" pageId="4" pageNumber="5" type="materials_examined">
<paragraph id="F61836AEE5161145FF7FFC7A7F1742C6" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF7FFC7A7C3F428E" bold="true" box="[151,328,906,931]" pageId="4" pageNumber="5">
<typeStatus id="291C880CE5161145FF7FFC7A7DA5428E" box="[151,210,906,931]" pageId="4" pageNumber="5">Type</typeStatus>
material.
</emphasis>
<typeStatus id="291C880CE5161145FEBAFC7A7CCD428E" box="[338,442,906,931]" pageId="4" pageNumber="5" type="holotype">Holotype</typeStatus>
male,
<quantity id="315F9B4BE5161145FDE4FC7A7F1F428F" box="[524,616,906,931]" metricMagnitude="-3" metricUnit="m" metricValue="4.6" pageId="4" pageNumber="5" unit="mm" value="4.6">4.6 mm</quantity>
, Great Chagos Bank, Brothers Island, outer reef, dead branching coral heads,
<specimenCount id="E0A1FD27E5161145FF0EFC5F7C5042EB" box="[230,295,943,967]" pageId="4" pageNumber="5" type="generic">
<quantity id="315F9B4BE5161145FF0EFC5F7C5442EB" box="[230,291,943,967]" metricMagnitude="1" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="5" unit="m" value="10.0">10 m</quantity>
.
</specimenCount>
C. Head and H. Koldewey,
<date id="8219106EE5161145FD82FC5F7F9E42EA" box="[618,745,943,967]" pageId="4" pageNumber="5" value="2012-02-27">27.02.2012</date>
(
<collectionCode id="90B6AE6BE5161145FD10FC5E7E1042EA" box="[760,871,942,967]" pageId="4" pageNumber="5">OUMNH</collectionCode>
.ZC.2013.06.011).
<typeStatus id="291C880CE5161145FBD1FC5F79D142EA" box="[1081,1190,943,967]" pageId="4" pageNumber="5" type="paratype">Paratypes</typeStatus>
<specimenCount id="E0A1FD27E5161145FB47FC5F786842EA" box="[1199,1311,942,967]" pageId="4" pageNumber="5" type="female">2 females</specimenCount>
, same data as
<typeStatus id="291C880CE5161145FF5DFC227C6042C6" box="[181,279,978,1003]" pageId="4" pageNumber="5" type="holotype">holotype</typeStatus>
(
<collectionCode id="90B6AE6BE5161145FECEFC227CE242C6" box="[294,405,978,1003]" pageId="4" pageNumber="5">OUMNH</collectionCode>
.ZC.2013.06.012).
</paragraph>
</subSubSection>
<subSubSection id="BEBD6525E5161145FF2FFC0678774522" box="[199,1280,1014,1039]" pageId="4" pageNumber="5" type="etymology">
<paragraph id="F61836AEE5161145FF2FFC0678774522" blockId="4.[151,1436,906,2011]" box="[199,1280,1014,1039]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FFC067C394522" bold="true" box="[199,334,1014,1039]" pageId="4" pageNumber="5">Etymology.</emphasis>
<taxonomicName id="31A74D2DE5161145FEBCFC077C004523" authority="Latin" authorityName="Latin" box="[340,375,1015,1038]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="ora">ora</taxonomicName>
= Latin, ledge, referring to the short overhanging palm of the male gnathopod 2.
</paragraph>
</subSubSection>
<subSubSection id="BEBD6525E5161145FF2FFBEA7FF64762" pageId="4" pageNumber="5" type="description">
<paragraph id="F61836AEE5161145FF2FFBEA7FAF451F" blockId="4.[151,1436,906,2011]" box="[199,728,1050,1075]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FFBEA7C2E451E" bold="true" box="[199,345,1050,1075]" pageId="4" pageNumber="5">Description.</emphasis>
Based on male
<typeStatus id="291C880CE5161145FDE3FBEA7F07451E" box="[523,624,1050,1075]" pageId="4" pageNumber="5" type="holotype">holotype</typeStatus>
,
<quantity id="315F9B4BE5161145FD93FBEA7FA3451F" box="[635,724,1050,1075]" metricMagnitude="-3" metricUnit="m" metricValue="4.6" pageId="4" pageNumber="5" unit="mm" value="4.6">4.6 mm</quantity>
.
</paragraph>
<paragraph id="F61836AEE5161145FF2FFBCE783D45EE" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FFBCE7C79457A" bold="true" box="[199,270,1086,1111]" pageId="4" pageNumber="5">Head.</emphasis>
<emphasis id="C4D3EABCE5161145FEFCFBCE7C27457A" box="[276,336,1086,1111]" italics="true" pageId="4" pageNumber="5">Head</emphasis>
eye lobes rounded with subocular notch.
<emphasis id="C4D3EABCE5161145FCCCFBCF7EE0457A" box="[804,919,1087,1111]" italics="true" pageId="4" pageNumber="5">Antenna 1</emphasis>
two thirds body length; peduncular article 1 a little longer than article 2; flagellum subequal in length with peduncle with 18 articles; accessory flagellum with two long articles and one rudimentary terminal article.
<emphasis id="C4D3EABCE5161145FCF6FB777EE245B2" box="[798,917,1159,1183]" italics="true" pageId="4" pageNumber="5">Antenna 2</emphasis>
shorter than antenna 1; peduncular article 5 shorter than 4; flagellum with 8 articles.
<emphasis id="C4D3EABCE5161145FDB6FB5A7FBD45EE" box="[606,714,1194,1219]" italics="true" pageId="4" pageNumber="5">Mandible</emphasis>
palp articles 2 and 3 subequal in length; article 3 falcate.
</paragraph>
<paragraph id="F61836AEE5161145FF2FFB3E79F6445A" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FFB3E7C5545CA" bold="true" box="[199,290,1230,1255]" pageId="4" pageNumber="5">Pereon.</emphasis>
<emphasis id="C4D3EABCE5161145FEC0FB3E7CCD45CA" box="[296,442,1230,1255]" italics="true" pageId="4" pageNumber="5">Gnathopod 1</emphasis>
coxa produced anteriorly; propodus longer than carpus, palm oblique.
<emphasis id="C4D3EABCE5161145FB26FB3E781645CA" box="[1230,1377,1230,1255]" italics="true" pageId="4" pageNumber="5">Gnathopod 2</emphasis>
coxa deeper than broad, unproduced; basis slender, 4 × as long as broad; carpus reduced, cup-shaped; propodus elongate subovoid, palm a short shelf bearing four strong robust setae, proximal to which is a shallow depression; dactylus fitting palm.
<emphasis id="C4D3EABCE5161145FEDBFACA7CCE447E" box="[307,441,1338,1363]" italics="true" pageId="4" pageNumber="5">Pereopod 3</emphasis>
propodus posterodistal margin with strong curved robust seta.
<emphasis id="C4D3EABCE5161145FB43FACA782F447E" box="[1195,1368,1338,1363]" italics="true" pageId="4" pageNumber="5">Pereopods 56</emphasis>
basis posterior margin weakly concave.
<emphasis id="C4D3EABCE5161145FDF1FAAE7FED445B" box="[537,666,1374,1399]" italics="true" pageId="4" pageNumber="5">Pereopod 7</emphasis>
basis evenly convex, very weakly notched.
</paragraph>
<paragraph id="F61836AEE5161145FF2FFA727EFB472A" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FFA727C6644B6" bold="true" box="[199,273,1410,1435]" pageId="4" pageNumber="5">Pleon.</emphasis>
<emphasis id="C4D3EABCE5161145FEF0FA747C0E44B6" box="[280,377,1412,1435]" italics="true" pageId="4" pageNumber="5">Epimera</emphasis>
13 each with posterodistal spine, that of epimeron 3 the largest.
<emphasis id="C4D3EABCE5161145FB8BFA7279B944B6" box="[1123,1230,1410,1435]" italics="true" pageId="4" pageNumber="5">Uropod 1</emphasis>
with many robust setae; rami subequal, a little shorter than peduncle.
<emphasis id="C4D3EABCE5161145FD15FA567E1A4492" box="[765,877,1446,1471]" italics="true" pageId="4" pageNumber="5">Uropod 2</emphasis>
inner ramus longer than outer and longer than peduncle.
<emphasis id="C4D3EABCE5161145FEE2FA3A7C0244CE" box="[266,373,1482,1507]" italics="true" pageId="4" pageNumber="5">Uropod 3</emphasis>
rami slender longer than peduncle, inner ramus longer than outer.
<emphasis id="C4D3EABCE5161145FB8AFA3A79DD44CE" box="[1122,1194,1482,1507]" italics="true" pageId="4" pageNumber="5">Telson</emphasis>
deeply notched, with bifid lobe terminations and bearing two unequal setae on each lobe.
</paragraph>
<paragraph id="F61836AEE5161145FF2FF9E27FF64762" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FF9E27C694706" bold="true" box="[199,286,1554,1579]" pageId="4" pageNumber="5">Female</emphasis>
(sexually dimorphic characters).
<emphasis id="C4D3EABCE5161145FD7BF9E27E514706" box="[659,806,1554,1579]" italics="true" pageId="4" pageNumber="5">Gnathopod 2</emphasis>
carpus less reduced that in male; propodus more slender than in male and with oblique regular palm.
</paragraph>
</subSubSection>
<subSubSection id="BEBD6525E5161145FF2FF9AA7FCF469B" pageId="4" pageNumber="5" type="discussion">
<paragraph id="F61836AEE5161145FF2FF9AA7C21460B" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FF9AA7C4C475E" bold="true" box="[199,315,1626,1651]" pageId="4" pageNumber="5">Remarks.</emphasis>
<taxonomicName id="31A74D2DE5161145FEADF9AA7C84475E" box="[325,499,1626,1651]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="ora">
<emphasis id="C4D3EABCE5161145FEADF9AA7C84475E" box="[325,499,1626,1651]" italics="true" pageId="4" pageNumber="5">Elasmopus ora</emphasis>
</taxonomicName>
resembles
<taxonomicName id="31A74D2DE5161145FD90F9AC794A475E" authority="Hughes &amp; Lowry, 2011" authorityName="Hughes &amp; Lowry" authorityYear="2011" box="[632,1085,1626,1651]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="mcluerensis">
<emphasis id="C4D3EABCE5161145FD90F9AC7E57475E" box="[632,800,1626,1651]" italics="true" pageId="4" pageNumber="5">E. mcluerensis</emphasis>
Hughes &amp; Lowry, 2011
</taxonomicName>
from the Australian Northern Territories. It differs markedly in the third uropod, which is relatively elongate and slender in
<taxonomicName id="31A74D2DE5161145FB52F98F787647BB" box="[1210,1281,1663,1686]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="ora">
<emphasis id="C4D3EABCE5161145FB52F98F787647BB" box="[1210,1281,1663,1686]" italics="true" pageId="4" pageNumber="5">E. ora</emphasis>
</taxonomicName>
but short and stout in
<taxonomicName id="31A74D2DE5161145FF1CF9547CEE4796" box="[244,409,1698,1723]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="mcluerensis">
<emphasis id="C4D3EABCE5161145FF1CF9547CEE4796" box="[244,409,1698,1723]" italics="true" pageId="4" pageNumber="5">E. mcluerensis</emphasis>
</taxonomicName>
. In addition, the telson shape is a little different in the two species and bears two setae on each side in
<taxonomicName id="31A74D2DE5161145FEC2F9377C0447F3" box="[298,371,1735,1758]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="ora">
<emphasis id="C4D3EABCE5161145FEC2F9377C0447F3" box="[298,371,1735,1758]" italics="true" pageId="4" pageNumber="5">E. ora</emphasis>
</taxonomicName>
but four setae on each side in
<taxonomicName id="31A74D2DE5161145FD36F9377EF247F2" box="[734,901,1734,1759]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="mcluerensis">
<emphasis id="C4D3EABCE5161145FD36F9377EF247F2" box="[734,901,1734,1759]" italics="true" pageId="4" pageNumber="5">E. mcluerensis</emphasis>
</taxonomicName>
. The uropod 3 is similar to that of
<taxonomicName id="31A74D2DE5161145FACCF9377C05462E" authority="Schellenberg, 1938" authorityName="Schellenberg" authorityYear="1938" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="gracilis">
<emphasis id="C4D3EABCE5161145FACCF93778EC47F2" box="[1316,1435,1734,1759]" italics="true" pageId="4" pageNumber="5">E. gracilis</emphasis>
<bibRefCitation id="92364B5FE5161145FF7FF91A7C05462E" author="Schellenberg" box="[151,370,1770,1795]" pageId="4" pageNumber="5" refString="Schellenberg, A. (1938) Litorale Amphipoden des tropischen Pazifiks. Kunglia Svenska Vetenskaps Akademiens Handlingar, (3), 16, 1 - 105." type="journal article" year="1938">Schellenberg, 1938</bibRefCitation>
</taxonomicName>
, but in that species the posterior margin of the propodus in the male gnathopod 2 is clothed in dense long setae.
</paragraph>
<paragraph id="F61836AEE5161145FF2FF8C27CDA46BE" blockId="4.[151,1436,906,2011]" pageId="4" pageNumber="5">
<taxonomicName id="31A74D2DE5161145FF2FF8C27F3B4666" authority="Bate, 1862" authorityName="Bate" authorityYear="1862" box="[199,588,1842,1867]" class="Malacostraca" family="Melitidae" genus="Elasmopus" kingdom="Animalia" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="pectenicrus">
<emphasis id="C4D3EABCE5161145FF2FF8C27CBE4666" box="[199,457,1842,1867]" italics="true" pageId="4" pageNumber="5">Elasmopus pectenicrus</emphasis>
Bate, 1862
</taxonomicName>
, has a similar shaped male gnathopod 2, but the propodus of that appendage is clothed in dense long setae on the posterior margin and the basis of pereopod
<quantity id="315F9B4BE5161145FBF2F8A679314642" box="[1050,1094,1878,1903]" metricMagnitude="-1" metricUnit="m" metricValue="1.524" pageId="4" pageNumber="5" unit="in" value="6.0">6 in</quantity>
that species is crenulate along the posterodistal margin.
</paragraph>
<paragraph id="F61836AEE5161145FF2FF86E7FCF469B" blockId="4.[151,1436,906,2011]" box="[199,696,1950,1975]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FF86E7C5D469A" bold="true" box="[199,298,1950,1975]" pageId="4" pageNumber="5">Habitat.</emphasis>
Dead coral heads in shallow water.
</paragraph>
</subSubSection>
<subSubSection id="BEBD6525E5161145FF2FF8327E6B46F6" box="[199,796,1986,2011]" pageId="4" pageNumber="5" type="distribution">
<paragraph id="F61836AEE5161145FF2FF8327E6B46F6" blockId="4.[151,1436,906,2011]" box="[199,796,1986,2011]" pageId="4" pageNumber="5">
<emphasis id="C4D3EABCE5161145FF2FF8327C1746F6" bold="true" box="[199,352,1986,2011]" pageId="4" pageNumber="5">Distribution.</emphasis>
Known only from Chagos archipelago.
</paragraph>
</subSubSection>
</treatment>
</document>