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<document id="3F040E1CDEDD45C1B82355B2E4D70F9A" ID-CLB-Dataset="32304" ID-DOI="10.11646/zootaxa.4311.4.3" ID-GBIF-Dataset="b9f09593-6aa2-4481-8e98-51b5626af5ac" ID-ISSN="1175-5326" ID-Zenodo-Dep="848363" ID-ZooBank="280776Eb-B3Ff-491D-Ab9F-D0A5F82Ae691" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1503640246319" checkinUser="plazi" docAuthor="Lowry, James Kenneth" docDate="2017" docId="B04EF631161D9423FF7B7727C399C29C" docLanguage="en" docName="zootaxa.4311.4.3.pdf" docOrigin="Zootaxa 4311 (4)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Hermesorchestia Lowry 2017, gen. nov." docType="treatment" docVersion="7" lastPageNumber="492" masterDocId="4C778E49161C9422FFEC7419C014C54A" masterDocTitle="Hermesorchestia alastairi gen. et sp. nov. from Australia (Talitridae: Senticaudata: Amphipoda: Crustacea)" masterLastPageNumber="506" masterPageNumber="491" pageNumber="492" updateTime="1698467248207" updateUser="ExternalLinkService">
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<mods:title id="AFDDCDAA4773B4AC34B7A8DB4757F73E">Hermesorchestia alastairi gen. et sp. nov. from Australia (Talitridae: Senticaudata: Amphipoda: Crustacea)</mods:title>
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<mods:namePart id="0649CB52373216B5A529E425A5CE0A1C">Lowry, James Kenneth</mods:namePart>
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<mods:date id="73335A9401AFBCA8B5F3869CA0E5DA5E">2017</mods:date>
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<treatment id="B04EF631161D9423FF7B7727C399C29C" ID-DOI="http://doi.org/10.5281/zenodo.6042218" ID-GBIF-Taxon="132923583" ID-Zenodo-Dep="6042218" LSID="urn:lsid:plazi:treatment:B04EF631161D9423FF7B7727C399C29C" httpUri="http://treatment.plazi.org/id/B04EF631161D9423FF7B7727C399C29C" lastPageNumber="492" pageId="1" pageNumber="492">
<subSubSection id="70FD14AC161D9423FF7B7727C3FBC0DF" pageId="1" pageNumber="492" type="nomenclature">
<paragraph id="38584727161D9423FF7B7727C1CDC612" blockId="1.[151,473,830,856]" box="[151,473,830,856]" pageId="1" pageNumber="492">
<heading id="6310F04B161D9423FF7B7727C1CDC612" bold="true" box="[151,473,830,856]" fontSize="11" level="1" pageId="1" pageNumber="492" reason="1">
<emphasis id="0A939B35161D9423FF7B7727C1CDC612" bold="true" box="[151,473,830,856]" pageId="1" pageNumber="492">
<taxonomicName id="FFE73CA4161D9423FF7B7727C170C612" ID-CoL="7PJXH" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[151,356,830,856]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0A939B35161D9423FF7B7727C170C612" bold="true" box="[151,356,830,856]" italics="true" pageId="1" pageNumber="492">Hermesorchestia</emphasis>
</taxonomicName>
<taxonomicNameLabel id="11A0264E161D9423FE877727C1CDC612" box="[363,473,830,856]" pageId="1" pageNumber="492" rank="genus">gen. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="38584727161D9423FF7B779CC3FBC0DF" blockId="1.[151,1437,901,2006]" pageId="1" pageNumber="492">
<emphasis id="0A939B35161D9423FF7B779CC1B7C6D4" bold="true" box="[151,419,901,926]" pageId="1" pageNumber="492">Diagnostic description</emphasis>
(based on male). Head
<emphasis id="0A939B35161D9423FD59779FC2CEC6D7" box="[693,730,902,925]" italics="true" pageId="1" pageNumber="492">eye</emphasis>
medium size (greater than 1/5 to 1/3 head length).
<emphasis id="0A939B35161D9423FAC4779FC588C6D4" box="[1320,1436,902,926]" italics="true" pageId="1" pageNumber="492">Antenna 1</emphasis>
long, reaching midpoint or slightly beyond end of antenna 2 peduncle.
<emphasis id="0A939B35161D9423FC3377B3C442C688" box="[991,1110,938,962]" italics="true" pageId="1" pageNumber="492">Antenna 2</emphasis>
peduncular articles slender, article 3 without plate or process ventrally, flagellum apical article minute,
<emphasis id="0A939B35161D9423FC1577D4C48CC6AC" box="[1017,1176,973,998]" italics="true" pageId="1" pageNumber="492">virgula divina</emphasis>
present.
<emphasis id="0A939B35161D9423FAEE77D4C57AC6AC" box="[1282,1390,973,998]" italics="true" pageId="1" pageNumber="492">Mandible</emphasis>
left lacinia mobilis with 4 cusps.
<emphasis id="0A939B35161D9423FE3077E8C221C140" box="[476,565,1009,1034]" italics="true" pageId="1" pageNumber="492">Labrum</emphasis>
epistome with many robust setae.
<emphasis id="0A939B35161D9423FC5477E8C425C140" box="[952,1073,1009,1034]" italics="true" pageId="1" pageNumber="492">Maxilliped</emphasis>
precoxa ventral margin smooth; palp article 2 distomedial lobe well developed; article 4 fused with article 3.
<emphasis id="0A939B35161D9423FBFE700CC4B3C164" box="[1042,1191,1045,1070]" italics="true" pageId="1" pageNumber="492">Gnathopod 1</emphasis>
subchelate; posterior margin of carpus and propodus each with lobe covered in palmate setae.
<emphasis id="0A939B35161D9423FC057020C46BC118" box="[1001,1151,1081,1106]" italics="true" pageId="1" pageNumber="492">Gnathopod 2</emphasis>
subchelate; dactylus not distally modified, apically acute.
<emphasis id="0A939B35161D9423FDC67044C2CEC13C" box="[554,730,1117,1142]" italics="true" pageId="1" pageNumber="492">Pereopods 37</emphasis>
bi-cuspidactylate; without setae along posterior margin of dactylus.
<emphasis id="0A939B35161D9423FEED7098C196C1D0" box="[257,386,1153,1178]" italics="true" pageId="1" pageNumber="492">Pereopod 4</emphasis>
significantly shorter than pereopod 3; dactylus dissimilar to dactylus of pereopod 3, thickened proximally or notched midway along posterior margin.
<emphasis id="0A939B35161D9423FCF570BCC389C1F7" box="[793,925,1189,1214]" italics="true" pageId="1" pageNumber="492">Pereopod 5</emphasis>
dactylus long, slender.
<emphasis id="0A939B35161D9423FB5D70BCC521C1F4" box="[1201,1333,1189,1214]" italics="true" pageId="1" pageNumber="492">Pereopod 6</emphasis>
sexually dimorphic merus and carpus expanded in males.
<emphasis id="0A939B35161D9423FD5470D0C330C1A8" box="[696,804,1225,1250]" italics="true" pageId="1" pageNumber="492">Pereopod</emphasis>
7 sexually dimorphic, basis, merus and carpus variously expanded in males; merus developed as a 3-dimensional structure.
<emphasis id="0A939B35161D9423FC5970F4C439C04C" box="[949,1069,1261,1286]" italics="true" pageId="1" pageNumber="492">Pleonite 3</emphasis>
with or without dorsal spines.
<emphasis id="0A939B35161D9423FF7B7108C125C060" box="[151,305,1297,1322]" italics="true" pageId="1" pageNumber="492">Pleopods 13</emphasis>
reduced, rami unsegmented.
<emphasis id="0A939B35161D9423FD92710BC304C060" box="[638,784,1298,1322]" italics="true" pageId="1" pageNumber="492">Epimera 13</emphasis>
ventral margins without slits.
<emphasis id="0A939B35161D9423FB857108C4C1C060" box="[1129,1237,1297,1322]" italics="true" pageId="1" pageNumber="492">Uropod 1</emphasis>
outer ramus with single facial/outer row of marginal robust setae.
<emphasis id="0A939B35161D9423FD5C712FC32EC004" box="[688,826,1334,1358]" italics="true" pageId="1" pageNumber="492">Urosomite 3</emphasis>
subrectangular, deeper than broad.
<emphasis id="0A939B35161D9423FB2A712CC525C004" box="[1222,1329,1333,1358]" italics="true" pageId="1" pageNumber="492">Uropod 3</emphasis>
peduncle dorsally concave, margin accommodating telson.
<emphasis id="0A939B35161D9423FD2E7140C313C038" box="[706,775,1369,1394]" italics="true" pageId="1" pageNumber="492">Telson</emphasis>
with notch and dorsal midline, broader than long, laterally and apically margins convex with 10+ lateral, apical and dorsal robust setae.
</paragraph>
</subSubSection>
<subSubSection id="70FD14AC161D9423FF2B71B8C2DEC094" pageId="1" pageNumber="492" type="etymology">
<paragraph id="38584727161D9423FF2B71B8C2DEC094" blockId="1.[151,1437,901,2006]" pageId="1" pageNumber="492">
<emphasis id="0A939B35161D9423FF2B71B8C15AC0F0" bold="true" box="[199,334,1441,1466]" pageId="1" pageNumber="492">Etymology.</emphasis>
From the stem
<taxonomicName id="FFE73CA4161D9423FDEE71B8C264C0F0" authorityName="Leach" authorityYear="1814" box="[514,624,1441,1466]" class="Malacostraca" family="Talitridae" genus="Orchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FDEE71B8C264C0F0" box="[514,624,1441,1466]" italics="true" pageId="1" pageNumber="492">Orchestia</emphasis>
</taxonomicName>
and Hermes, the Greek wing-footed messenger god, in reference to the expanded pereopods 7 articles. Gender masculine.
</paragraph>
</subSubSection>
<subSubSection id="70FD14AC161D9423FF2B71F0C46DC348" box="[199,1145,1513,1538]" pageId="1" pageNumber="492" type="materials_examined">
<paragraph id="38584727161D9423FF2B71F0C46DC348" blockId="1.[151,1437,901,2006]" box="[199,1145,1513,1538]" pageId="1" pageNumber="492">
<emphasis id="0A939B35161D9423FF2B71F0C14FC348" bold="true" box="[199,347,1513,1538]" pageId="1" pageNumber="492">Type species</emphasis>
.
<taxonomicName id="FFE73CA4161D9423FE8571F0C299C348" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[361,653,1513,1538]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="species" species="alastairi" status="sp. nov.">
<emphasis id="0A939B35161D9423FE8571F0C299C348" box="[361,653,1513,1538]" italics="true" pageId="1" pageNumber="492">Hermesorchestia alastairi</emphasis>
</taxonomicName>
<taxonomicNameLabel id="11A0264E161D9423FD7871F3C2F9C34B" box="[660,749,1514,1537]" pageId="1" pageNumber="492" rank="species">sp. nov.</taxonomicNameLabel>
, original designation by monotypy.
</paragraph>
</subSubSection>
<subSubSection id="70FD14AC161D9423FF2B7214C399C29C" pageId="1" pageNumber="492" type="discussion">
<paragraph id="38584727161D9423FF2B7214C173C20C" blockId="1.[151,1437,901,2006]" pageId="1" pageNumber="492">
<emphasis id="0A939B35161D9423FF2B7214C120C36C" bold="true" box="[199,308,1549,1574]" pageId="1" pageNumber="492">Remarks</emphasis>
. Sexual dimorphism of the male pereopods 6 and 7 occurs in around 18% of talitrid genera (
<bibRefCitation id="5C763AD6161D9423FF727228C145C300" author="Bousfield" box="[158,337,1585,1610]" pageId="1" pageNumber="492" refString="Bousfield, E. L. (1982) The amphipod superfamily Talitroidea in the northeastern Pacific region. 1. Family Talitridae: systematics and distributional ecology. National Museum of Natural Sciences (Ottawa), Publications in Biological Oceanography, 11, 1 - 73." type="journal article" year="1982">Bousfield 1982</bibRefCitation>
,
<bibRefCitation id="5C763AD6161D9423FEB3722BC18FC300" author="Bousfield" box="[351,411,1586,1610]" pageId="1" pageNumber="492" refString="Bousfield, E. L. (1984) Recent advances in the systematics and biogeography of landhoppers (Amphipoda: Talitridae) of the Indo-Pacific Region. Bishop Museum Special Publication, 72, 171 - 210." type="journal article" year="1984">1984</bibRefCitation>
). The shape and form of pereopods 6 and
<quantity id="FF1FEAC2161D9423FC6B722BC3A1C300" box="[903,949,1585,1610]" metricMagnitude="-1" metricUnit="m" metricValue="1.778" pageId="1" pageNumber="492" unit="in" value="7.0">7 in</quantity>
<taxonomicName id="FFE73CA4161D9423FC517228C46FC300" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[957,1147,1585,1610]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0A939B35161D9423FC517228C46FC300" box="[957,1147,1585,1610]" italics="true" pageId="1" pageNumber="492">Hermesorchestia</emphasis>
</taxonomicName>
<taxonomicNameLabel id="11A0264E161D9423FB69722BC4FAC303" box="[1157,1262,1586,1610]" pageId="1" pageNumber="492" rank="genus">gen. nov.</taxonomicNameLabel>
is novel to the group. Such extreme pereopod enlargement/expansion in relation to overall body size is also seen in
<taxonomicName id="FFE73CA4161D9423FB11724CC1A5C3D8" authority="Lowry &amp; Coleman, 2011" authorityName="Lowry &amp; Coleman" authorityYear="2011" class="Malacostraca" family="Talitridae" genus="Africorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FB11724CC588C324" box="[1277,1436,1621,1646]" italics="true" pageId="1" pageNumber="492">Africorchestia</emphasis>
<bibRefCitation id="5C763AD6161D9423FF7B7263C1A5C3D8" author="Lowry" box="[151,433,1657,1682]" pageId="1" pageNumber="492" refString="Lowry, J. K. &amp; Coleman, C. O. (2011) Africorchestia a new genus of sand-hoppers (Crustacea: Amphipoda: Talitridae) from western Africa and south-western Europe. Zootaxa, 2825, 55 - 68." type="journal article" year="2011">Lowry &amp; Coleman, 2011</bibRefCitation>
</taxonomicName>
. In
<taxonomicName id="FFE73CA4161D9423FE347260C282C3D8" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[472,662,1657,1682]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0A939B35161D9423FE347260C282C3D8" box="[472,662,1657,1682]" italics="true" pageId="1" pageNumber="492">Hermesorchestia</emphasis>
</taxonomicName>
pereopod 7 is the largest pereopod where the basis, merus and carpus are grossly developed, while in
<taxonomicName id="FFE73CA4161D9423FDEA7284C2B1C3FC" authorityName="Lowry &amp; Coleman" authorityYear="2011" box="[518,677,1693,1718]" class="Malacostraca" family="Talitridae" genus="Africorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FDEA7284C2B1C3FC" box="[518,677,1693,1718]" italics="true" pageId="1" pageNumber="492">Africorchestia</emphasis>
</taxonomicName>
pereopod 6 is extremely elongate and only the basis is expanded. The male pleonite 3 dorsal projections which develop in only some male
<taxonomicName id="FFE73CA4161D9423FC2972DBC452C390" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[965,1094,1729,1754]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="species" species="alastairi" status="gen. et sp. nov.">
<emphasis id="0A939B35161D9423FC2972DBC452C390" box="[965,1094,1729,1754]" italics="true" pageId="1" pageNumber="492">H. alastairi</emphasis>
</taxonomicName>
<taxonomicNameLabel id="11A0264E161D9423FBA072D8C4EDC390" box="[1100,1273,1729,1754]" pageId="1" pageNumber="492" rank="species">
<emphasis id="0A939B35161D9423FBA072D8C4EDC390" bold="true" box="[1100,1273,1729,1754]" pageId="1" pageNumber="492">gen. et sp. nov.</emphasis>
</taxonomicNameLabel>
individuals, is also seen in
<taxonomicName id="FFE73CA4161D9423FEC072FCC1DFC3B4" authorityName="Lowry &amp; Coleman" authorityYear="2011" box="[300,459,1765,1790]" class="Malacostraca" family="Talitridae" genus="Africorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FEC072FCC1DFC3B4" box="[300,459,1765,1790]" italics="true" pageId="1" pageNumber="492">Africorchestia</emphasis>
</taxonomicName>
and
<taxonomicName id="FFE73CA4161D9423FDE572FCC3C8C3B4" authority="Lowry &amp; Baldanzi, 2016" authorityName="Lowry &amp; Baldanzi" authorityYear="2016" box="[521,988,1765,1790]" class="Malacostraca" family="Talitridae" genus="Capeorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FDE572FCC2B8C3B4" box="[521,684,1765,1790]" italics="true" pageId="1" pageNumber="492">Capeorchestia</emphasis>
<bibRefCitation id="5C763AD6161D9423FD5A72FFC3C8C3B4" author="Lowry" box="[694,988,1765,1790]" pageId="1" pageNumber="492" refString="Lowry, J. K. &amp; Baldanzi, S. (2016) New talitrids from South Africa (Amphipoda, Senticaudata, Talitroidea, Talitridae) with notes on their ecology. Zootaxa, 4144 (2), 151 - 174. https: // doi. org / 10.11646 / zootaxa. 4144.2.1" type="journal article" year="2016">Lowry &amp; Baldanzi, 2016</bibRefCitation>
</taxonomicName>
, however these projections are always present in the latter two genera. To-date these are the only three talitrid genera of the ~73 documented which have dorsal projections.
</paragraph>
<paragraph id="38584727161D9423FF2B7348C399C29C" blockId="1.[151,1437,901,2006]" pageId="1" pageNumber="492">
The presence of robust setae on the labrum is also known for
<taxonomicName id="FFE73CA4161D9423FC797348C523C220" authority="Serejo &amp; Lowry, 2008" authorityName="Serejo &amp; Lowry" authorityYear="2008" box="[917,1335,1873,1898]" class="Malacostraca" family="Talitridae" genus="Bellorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FC797348C43DC220" box="[917,1065,1873,1898]" italics="true" pageId="1" pageNumber="492">Bellorchestia</emphasis>
<bibRefCitation id="5C763AD6161D9423FBDF7348C523C220" author="Serejo" box="[1075,1335,1873,1898]" pageId="1" pageNumber="492" refString="Serejo, C. S. &amp; Lowry, J. K. (2008) The Coastal Talitridae (Amphipoda: Talitroidea) of Southern and Western Australia, with Comments on Platorchestia platensis (Kroyer, 1845). Records of the Australian Museum, 60, 161 - 206. https: // doi. org / 10.3853 / j. 0067 - 1975.60.2008.1491" type="journal article" year="2008">Serejo &amp; Lowry, 2008</bibRefCitation>
</taxonomicName>
, a genus found in southern Australia, including Tasmania. The presence of palmate lobes on the distal margins of the carpus and propodus of gnathopod 1 separates
<taxonomicName id="FFE73CA4161D9423FDB37380C309C2F8" authority="Lowry, 2017" authorityName="Lowry" authorityYear="2017" box="[607,797,1945,1970]" class="Malacostraca" family="Talitridae" genus="Hermesorchestia" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="0A939B35161D9423FDB37380C309C2F8" box="[607,797,1945,1970]" italics="true" pageId="1" pageNumber="492">Hermesorchestia</emphasis>
</taxonomicName>
from
<taxonomicName id="FFE73CA4161D9423FC8A7380C3EFC2F8" authorityName="Serejo &amp; Lowry" authorityYear="2008" box="[870,1019,1945,1970]" class="Malacostraca" family="Talitridae" genus="Bellorchestia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="genus">
<emphasis id="0A939B35161D9423FC8A7380C3EFC2F8" box="[870,1019,1945,1970]" italics="true" pageId="1" pageNumber="492">Bellorchestia</emphasis>
</taxonomicName>
where the lobes are only present on the propodus, the latter state being rare within the family
<taxonomicName id="FFE73CA4161D9423FCF673A4C39DC29C" authorityName="Lowry" authorityYear="2017" box="[794,905,1981,2006]" class="Malacostraca" family="Talitridae" kingdom="Animalia" order="Amphipoda" pageId="1" pageNumber="492" phylum="Arthropoda" rank="family">Talitridae</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>