treatments-xml/data/6A/7D/87/6A7D8794FFE8FFF8FF24FC6FFEB2FD69.xml

<document id="5381E5A803E788793D7F9598B02926E0" ID-DOI="10.11646/zootaxa.4748.1.9" ID-GBIF-Dataset="368ee07f-340b-47b1-a0d0-de421fe309d1" ID-ISSN="1175-5326" ID-Zenodo-Dep="3697667" ID-ZooBank="699BA3A4-B4C6-4533-AE26-91D728960FBD" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1583398813915" checkinUser="plazi" docAuthor="Weston, Johanna N. J., Carrillo-Barragan, Priscilla, Linley, Thomas D., Reid, William D. K. &amp; Jamieson, Alan J." docDate="2020" docId="6A7D8794FFE8FFF8FF24FC6FFEB2FD69" docLanguage="en" docName="zootaxa.4748.1.9.pdf" docOrigin="Zootaxa 4748 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Eurythenes plasticus Weston 2020, sp. nov." docType="treatment" docUuid="828CBE38-47B2-4001-874D-53C0D2EA64D2" docUuidSource="ZooBank" docVersion="7" lastPageNumber="177" masterDocId="9644FFECFFEEFFF6FFB3FF92FFDAFF9A" masterDocTitle="New species of Eurythenes from hadal depths of the Mariana Trench, Pacific Ocean (Crustacea: Amphipoda)" masterLastPageNumber="181" masterPageNumber="163" pageNumber="169" updateTime="1698725061631" updateUser="plazi" zenodo-license-document="CLOSED">
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<mods:title id="C01C5C4471C19AB7128AE30A8E4802B6">New species of Eurythenes from hadal depths of the Mariana Trench, Pacific Ocean (Crustacea: Amphipoda)</mods:title>
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<mods:namePart id="3234D31C614FE649FDE2D01226236933">Weston, Johanna N. J.</mods:namePart>
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<mods:namePart id="494F0794CB2835B2C386BDD14D902853">Carrillo-Barragan, Priscilla</mods:namePart>
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<mods:namePart id="1C858F676550E206A647CD3CD3E2180A">Linley, Thomas D.</mods:namePart>
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<mods:namePart id="375FC6068F0EE9D7673C7920A377F7F6">Reid, William D. K.</mods:namePart>
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<heading id="B92381EEFFE8FFF0FF24FC6FFD86FB8D" bold="true" box="[151,604,1021,1048]" fontSize="11" level="1" pageId="6" pageNumber="169" reason="1">
<emphasis id="D0A0EA90FFE8FFF0FF24FC6FFD86FB8D" bold="true" box="[151,604,1021,1048]" pageId="6" pageNumber="169">
<taxonomicName id="25D44D01FFE8FFF0FF24FC6FFE49FB82" authority="Weston" authorityName="Weston" authorityYear="2020" box="[151,403,1021,1048]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="6" pageNumber="169" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE8FFF0FF24FC6FFE49FB82" bold="true" box="[151,403,1021,1048]" italics="true" pageId="6" pageNumber="169">Eurythenes plasticus</emphasis>
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Weston
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<paragraph id="E26B3682FFE8FFF0FF24FBB3FEC8FBA1" blockId="6.[151,604,1021,1083]" box="[151,274,1057,1083]" pageId="6" pageNumber="169">
(
<figureCitation id="7AEF2A07FFE8FFF0FF2CFBB3FED3FBA1" box="[159,265,1057,1083]" captionStart-0="FIGURE 4" captionStart-1="FIGURE 5" captionStart-2="FIGURE 6" captionStart-3="FIGURE 7" captionStart-4="FIGURE 8" captionStartId-0="7.[151,250,1811,1836]" captionStartId-1="8.[151,250,1935,1960]" captionStartId-2="9.[151,250,1974,1999]" captionStartId-3="10.[151,250,1978,2003]" captionStartId-4="11.[151,250,1620,1645]" captionTargetBox-0="[151,1436,181,1753]" captionTargetBox-1="[210,1396,171,1910]" captionTargetBox-2="[155,1418,190,1938]" captionTargetBox-3="[178,1381,195,1932]" captionTargetBox-4="[178,1406,204,1567]" captionTargetId-0="figure@7.[151,1436,181,1786]" captionTargetId-1="figure@8.[170,1416,163,1917]" captionTargetId-2="figure@9.[151,1436,166,1956]" captionTargetId-3="figure@10.[158,1430,166,1960]" captionTargetId-4="figure@11.[151,1436,166,1602]" captionTargetPageId-0="7" captionTargetPageId-1="8" captionTargetPageId-2="9" captionTargetPageId-3="10" captionTargetPageId-4="11" captionText-0="FIGURE 4. A, Photographs of specimens of E. plasticus sp. nov.: female holotype from 6865 m (A top; USNM 1615729), juvenile paratype from 6865 m (bottom left; USNM 1615730), male paratype from 6010 m (bottom right; USNM 1615732). B, Eurythenes plasticus sp. nov., mature female, holotype, USNM 1615729." captionText-1="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." captionText-2="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." captionText-3="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." captionText-4="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi-0="http://doi.org/10.5281/zenodo.3697675" figureDoi-1="http://doi.org/10.5281/zenodo.3697677" figureDoi-2="http://doi.org/10.5281/zenodo.3697679" figureDoi-3="http://doi.org/10.5281/zenodo.3697681" figureDoi-4="http://doi.org/10.5281/zenodo.3697683" httpUri-0="https://zenodo.org/record/3697675/files/figure.png" httpUri-1="https://zenodo.org/record/3697677/files/figure.png" httpUri-2="https://zenodo.org/record/3697679/files/figure.png" httpUri-3="https://zenodo.org/record/3697681/files/figure.png" httpUri-4="https://zenodo.org/record/3697683/files/figure.png" pageId="6" pageNumber="169">Figs. 4–8</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE8FFF0FF24FBFAFEE3F9AE" pageId="6" pageNumber="169" type="materials_examined">
<paragraph id="E26B3682FFE8FFF0FF24FBFAFE5DFB19" blockId="6.[151,1437,1128,2020]" box="[151,391,1128,1155]" pageId="6" pageNumber="169">
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<emphasis id="D0A0EA90FFE8FFF0FF24FBFAFE5DFB19" bold="true" box="[151,391,1128,1155]" pageId="6" pageNumber="169">Material Examined.</emphasis>
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</paragraph>
<paragraph id="E26B3682FFE8FFF0FF74FB1EFC3CFB32" blockId="6.[151,1437,1128,2020]" box="[199,998,1164,1192]" pageId="6" pageNumber="169">
<materialsCitation id="52BC3CDFFFE8FFF0FF74FB1EFC3CFB32" ID-GBIF-Occurrence="2574624126" box="[199,998,1164,1192]" collectionCode="USNM" elevation="6865" latitude="12.64065" location="Mariana Trench, Pacific Ocean" longLatPrecision="1" longitude="144.73796" pageId="6" pageNumber="169" specimenCode="USNM 1615729" specimenCount="1" typeStatus="holotype">
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<typeStatus id="3D6F8820FFE8FFF0FF74FB1EFEBCFB3D" box="[199,358,1164,1191]" pageId="6" pageNumber="169" type="holotype">HOLOTYPE</typeStatus>
</emphasis>
: Mature female, 
<specimenCode id="B2729EF9FFE8FFF0FD94FB1FFD3BFB3D" box="[551,737,1164,1191]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="6" pageNumber="169" type="Museum">USNM 1615729</specimenCode>
, body length 
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.
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<materialsCitation id="52BC3CDFFFE8FFF0FF74FB22FA47FB6A" ID-GBIF-Occurrence="2575230029" collectionCode="MT, USNM" elevation="6010" latitude="11.6071" longLatPrecision="7" longitude="144.8331" pageId="6" pageNumber="169" specimenCode="USNM 1615732, USNM 1615733, XXXX3" specimenCount="1" typeStatus="paratype">
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</emphasis>
: Mature male, 
<specimenCode id="B2729EF9FFE8FFF0FDACFB23FD06FB51" box="[543,732,1200,1227]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="6" pageNumber="169" type="Museum">USNM 1615732</specimenCode>
, GenBank (16S 
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), (COI 
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<collectionCode id="84C5AE47FFE8FFF0FBCFFB23FB7DFB51" box="[1148,1191,1201,1227]" country="Russia" name="Mus. Tinro, Vladyvostok" pageId="6" pageNumber="169">MT</collectionCode>
038070
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), body length 
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, Mariana Trench, Pacific Ocean (
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, 
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), cruise FK 
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, station LH14, depth 
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</quantity>
.
</materialsCitation>
<materialsCitation id="52BC3CDFFFE8FFF0FF24FB68FC1EFAC1" ID-GBIF-Occurrence="2575230030" collectionCode="MT, USNM" elevation="6010" latitude="11.6071" longLatPrecision="7" longitude="144.8331" pageId="6" pageNumber="169" specimenCode="USNM 1615732, USNM 1615733, XXXX3" specimenCount="1" typeStatus="paratype">
Immature female, 
<specimenCode id="B2729EF9FFE8FFF0FED5FB6BFDFAFA89" box="[358,544,1272,1299]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="6" pageNumber="169" type="Museum">USNM 1615733</specimenCode>
GenBank (16S 
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<collectionCode id="84C5AE47FFE8FFF0FD67FB6BFD25FA89" box="[724,767,1273,1299]" country="Russia" name="Mus. Tinro, Vladyvostok" pageId="6" pageNumber="169">MT</collectionCode>
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), (COI 
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<collectionCode id="84C5AE47FFE8FFF0FC18FB6BFC0DFA89" box="[939,983,1273,1299]" country="Russia" name="Mus. Tinro, Vladyvostok" pageId="6" pageNumber="169">MT</collectionCode>
038071
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), body length 
<quantity id="252C9B67FFE8FFF0FB7EFB6BFAE9FA8E" box="[1229,1331,1273,1300]" metricMagnitude="-2" metricUnit="m" metricValue="3.86" pageId="6" pageNumber="169" unit="mm" value="38.6">38.6 mm</quantity>
, Mariana Trench, Pacific Ocean (
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, 
<geoCoordinate id="87E05045FFE8FFF0FD97FA8FFD79FAAD" box="[548,675,1309,1335]" degrees="144.8331" direction="east" orientation="longitude" pageId="6" pageNumber="169" precision="5" value="144.8331">144.8331E</geoCoordinate>
), cruise FK 
<date id="966A1042FFE8FFF0FC9AFA8FFCA7FAAD" box="[809,893,1309,1335]" pageId="6" pageNumber="169" value="09-11-14">141109</date>
, station LH15, depth 
<quantity id="252C9B67FFE8FFF0FBC4FA8FFB0BFAA2" box="[1143,1233,1309,1336]" metricMagnitude="3" metricUnit="m" metricValue="6.142" pageId="6" pageNumber="169" unit="m" value="6142.0">
<elevation id="69F9D1B1FFE8FFF0FBC4FA8FFB0BFAA2" box="[1143,1233,1309,1336]" metricMagnitude="3" metricUnit="m" metricValue="6.142" pageId="6" pageNumber="169" unit="m" value="6142.0">6142 m</elevation>
</quantity>
. Juvenile, 
<collectionCode id="84C5AE47FFE8FFF0FAF8FA8FFA46FAAD" box="[1355,1436,1309,1335]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="6" pageNumber="169" type="Museum">USNM</collectionCode>
<specimenCode id="B2729EF9FFE8FFF0FF24FAD3FF23FAC1" box="[151,249,1345,1371]" collectionCode="XXXX" pageId="6" pageNumber="169">XXXX3</specimenCode>
, body length 
<quantity id="252C9B67FFE8FFF0FE23FAD2FE2CFAC6" box="[400,502,1344,1372]" metricMagnitude="-2" metricUnit="m" metricValue="1.56" pageId="6" pageNumber="169" unit="mm" value="15.6">15.6 mm</quantity>
, same collection location as type locality
</materialsCitation>
</paragraph>
<paragraph id="E26B3682FFE8FFF0FC77FAD3FC12FAC1" blockId="6.[151,1437,1128,2020]" box="[964,968,1345,1371]" pageId="6" pageNumber="169">.</paragraph>
<paragraph id="E26B3682FFE8FFF0FF74FAF6FDC7FA39" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74FAF6FE77FAE5" bold="true" box="[199,429,1380,1407]" pageId="6" pageNumber="169">PARAGENETYPE</emphasis>
: Juvenile, GenBank (16S 
<accessionNumber id="FD87AB61FFE8FFF0FD51FAF7FCBEFAE5" box="[738,868,1381,1407]" httpUri="https://www.ncbi.nlm.nih.gov/nuccore/MT021439" pageId="6" pageNumber="169" type="GenBank">
<collectionCode id="84C5AE47FFE8FFF0FD51FAF7FCD7FAE5" box="[738,781,1381,1407]" country="Russia" name="Mus. Tinro, Vladyvostok" pageId="6" pageNumber="169">MT</collectionCode>
<date id="966A1042FFE8FFF0FCBEFAF7FCBEFAE5" box="[781,868,1381,1407]" pageId="6" pageNumber="169" value="39-02-14">021439</date>
</accessionNumber>
), (COI 
<accessionNumber id="FD87AB61FFE8FFF0FC0DFAF7FB9BFAE5" box="[958,1089,1381,1407]" httpUri="https://www.ebi.ac.uk/ena/browser/api/embl/MT038072" pageId="6" pageNumber="169">
<collectionCode id="84C5AE47FFE8FFF0FC0DFAF7FC33FAE5" box="[958,1001,1381,1407]" country="Russia" name="Mus. Tinro, Vladyvostok" pageId="6" pageNumber="169">MT</collectionCode>
038072
</accessionNumber>
), body length 
<quantity id="252C9B67FFE8FFF0FB59FAF6FA8EFA1A" box="[1258,1364,1380,1408]" metricMagnitude="-2" metricUnit="m" metricValue="1.51" pageId="6" pageNumber="169" unit="mm" value="15.1">15.1 mm</quantity>
, same collection location as 
<typeStatus id="3D6F8820FFE8FFF0FE3FFA18FE66FA3E" box="[396,444,1418,1444]" pageId="6" pageNumber="169">type</typeStatus>
locality.
</paragraph>
<paragraph id="E26B3682FFE8FFF0FF74FA3EFE35FA76" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<materialsCitation id="52BC3CDFFFE8FFF0FF74FA3EFE32FA71" ID-GBIF-Occurrence="2574624124" collectionCode="USNM" pageId="6" pageNumber="169" specimenCode="USNM 1615731" specimenCount="2">
<emphasis id="D0A0EA90FFE8FFF0FF74FA3EFDD7FA5D" bold="true" box="[199,525,1452,1479]" pageId="6" pageNumber="169">NON-TYPE SPECIMENS:</emphasis>
Three juveniles, body lengths 12.5, 13.5 &amp; 
<quantity id="252C9B67FFE8FFF0FC48FA3EFBB8FA52" box="[1019,1122,1452,1480]" metricMagnitude="-2" metricUnit="m" metricValue="1.5699999999999998" pageId="6" pageNumber="169" unit="mm" value="15.7">15.7 mm</quantity>
, same collection location as 
<typeStatus id="3D6F8820FFE8FFF0FF24FA40FF1DFA76" box="[151,199,1490,1516]" pageId="6" pageNumber="169">type</typeStatus>
locality, 
<specimenCode id="B2729EF9FFE8FFF0FE9CFA43FE32FA71" box="[303,488,1488,1515]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="6" pageNumber="169" type="Museum">USNM 1615731</specimenCode>
</materialsCitation>
.
</paragraph>
<paragraph id="E26B3682FFE8FFF0FF74FA67FEE3F9AE" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74FA67FEA9F995" bold="true" box="[199,371,1524,1551]" pageId="6" pageNumber="169">
<typeStatus id="3D6F8820FFE8FFF0FF74FA67FED8F995" box="[199,258,1525,1551]" pageId="6" pageNumber="169">Type</typeStatus>
Locality.
</emphasis>
<location id="E70B6059FFE8FFF0FECEFA67FD38F995" LSID="urn:lsid:plazi:treatment:6A7D8794FFE8FFF8FF24FC6FFEB2FD69:E70B6059FFE8FFF0FECEFA67FD38F995" box="[381,738,1525,1551]" latitude="12.64065" longLatPrecision="1" longitude="144.73796" name="Mariana Trench, Pacific Ocean" pageId="6" pageNumber="169">Mariana Trench, Pacific Ocean</location>
(
<geoCoordinate id="87E05045FFE8FFF0FD40FA66FCAFF995" box="[755,885,1524,1551]" degrees="12.64065" direction="north" orientation="latitude" pageId="6" pageNumber="169" precision="1" value="12.64065">12.64065N</geoCoordinate>
, 
<geoCoordinate id="87E05045FFE8FFF0FC30FA67FBCAF98A" box="[899,1040,1525,1552]" degrees="144.73796" direction="east" orientation="longitude" pageId="6" pageNumber="169" precision="1" value="144.73796">144.73796E</geoCoordinate>
), cruise 
<collectionCode id="84C5AE47FFE8FFF0FBC1FA67FB31F995" box="[1138,1259,1525,1551]" pageId="6" pageNumber="169">FK141109</collectionCode>
, station WT02, depth 
<quantity id="252C9B67FFE8FFF0FF6FF98AFEEEF9AE" box="[220,308,1560,1588]" metricMagnitude="3" metricUnit="m" metricValue="6.865" pageId="6" pageNumber="169" unit="m" value="6865.0">
<elevation id="69F9D1B1FFE8FFF0FF6FF98AFEEEF9AE" box="[220,308,1560,1588]" metricMagnitude="3" metricUnit="m" metricValue="6.865" pageId="6" pageNumber="169" unit="m" value="6865.0">6865 m</elevation>
</quantity>
.
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE8FFF0FF74F9AFFD92F9E6" pageId="6" pageNumber="169" type="etymology">
<paragraph id="E26B3682FFE8FFF0FF74F9AFFD92F9E6" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74F9AFFE94F9CD" bold="true" box="[199,334,1597,1623]" pageId="6" pageNumber="169">Etymology.</emphasis>
The species names, 
<taxonomicName id="25D44D01FFE8FFF0FD8EF9AFFD7BF9CD" authorityName="Weston" authorityYear="2020" box="[573,673,1597,1623]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="6" pageNumber="169" phylum="Arthropoda" rank="species" species="plasticus">
<emphasis id="D0A0EA90FFE8FFF0FD8EF9AFFD7BF9CD" box="[573,673,1597,1623]" italics="true" pageId="6" pageNumber="169">plasticus</emphasis>
</taxonomicName>
, stems from Latin for plastic. This name speaks to the ubiquity of plastic pollution present in our oceans.
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE8FFF0FF74F916FAB5F8C9" pageId="6" pageNumber="169" type="diagnosis">
<paragraph id="E26B3682FFE8FFF0FF74F916FAB5F8C9" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74F916FE98F905" bold="true" box="[199,322,1668,1695]" pageId="6" pageNumber="169">Diagnosis.</emphasis>
Lateral cephalic lobe strongly produced, slightly triangular. Article 2 of mandibular palp narrow. Maxilliped inner plate with three to four apical protruding nodular setae. Gnathopod 1 subchelate, basis narrow (2.9x as long as wide), palm not protruding and weakly convex. Gnathopod 2 subchelate, coxa broad ventrally and weakly curved, palm convex. Pereopods 3 to 7 dactyli short. Pereopod 5 coxa bilobate and posterior lobe larger than anterior lobe. Epimeron 3 posteroventral corner subquadrate without small posteroventral tooth. Uropod 1 and 2 rami margins with spine-like setae. Dorsal carination with increasing degree on epimeron 1-3 and urosomite 1.
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE8FFFAFF74F8CEFAB1FA7D" lastPageId="12" lastPageNumber="175" pageId="6" pageNumber="169" type="description">
<paragraph id="E26B3682FFE8FFF0FF74F8CEFCB9F8ED" blockId="6.[151,1437,1128,2020]" box="[199,867,1884,1911]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74F8CEFD40F8ED" bold="true" box="[199,666,1884,1911]" pageId="6" pageNumber="169">
Description, based on 
<typeStatus id="3D6F8820FFE8FFF0FE63F8CFFDE2F8ED" box="[464,568,1885,1911]" pageId="6" pageNumber="169" type="holotype">holotype</typeStatus>
, female,
</emphasis>
USNM 1615729.
</paragraph>
<paragraph id="E26B3682FFE8FFF0FF74F812FD4BF879" blockId="6.[151,1437,1128,2020]" pageId="6" pageNumber="169">
<emphasis id="D0A0EA90FFE8FFF0FF74F812FE1BF801" bold="true" box="[199,449,1920,1947]" pageId="6" pageNumber="169">
BODY (
<figureCitation id="7AEF2A07FFE8FFF0FE95F812FEADF801" box="[294,375,1920,1947]" captionStart="FIGURE 4" captionStartId="7.[151,250,1811,1836]" captionTargetBox="[151,1436,181,1753]" captionTargetId="figure@7.[151,1436,181,1786]" captionTargetPageId="7" captionText="FIGURE 4. A, Photographs of specimens of E. plasticus sp. nov.: female holotype from 6865 m (A top; USNM 1615729), juvenile paratype from 6865 m (bottom left; USNM 1615730), male paratype from 6010 m (bottom right; USNM 1615732). B, Eurythenes plasticus sp. nov., mature female, holotype, USNM 1615729." figureDoi="http://doi.org/10.5281/zenodo.3697675" httpUri="https://zenodo.org/record/3697675/files/figure.png" pageId="6" pageNumber="169">Figs. 4</figureCitation>
, 
<figureCitation id="7AEF2A07FFE8FFF0FE37F813FE49F801" box="[388,403,1921,1947]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="6" pageNumber="169">5</figureCitation>
, 
<figureCitation id="7AEF2A07FFE8FFF0FE12F812FE68F801" box="[417,434,1920,1947]" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="6" pageNumber="169">6</figureCitation>
):
</emphasis>
surface smooth, without setae; urosomite 3 with an anterodorsal depression. 
<emphasis id="D0A0EA90FFE8FFF0FA95F813FA46F801" box="[1318,1436,1921,1947]" italics="true" pageId="6" pageNumber="169">Oostegites</emphasis>
present on gnathopod 2 to pereopod 5, elongate but lacking setae. 
<emphasis id="D0A0EA90FFE8FFF0FCCBF837FC30F825" box="[888,1002,1957,1983]" italics="true" pageId="6" pageNumber="169">Coxa gills</emphasis>
present on gnathopod 2 to pereopod 7. 
<emphasis id="D0A0EA90FFE8FFF0FF24F85BFEE5F879" box="[151,319,1993,2019]" italics="true" pageId="6" pageNumber="169">Colour pattern</emphasis>
at time of recovery unknown.
</paragraph>
<caption id="B6AB660AFFE9FFF1FF24F881FCA6F8E9" ID-DOI="http://doi.org/10.5281/zenodo.3697675" ID-Zenodo-Dep="3697675" httpUri="https://zenodo.org/record/3697675/files/figure.png" pageId="7" pageNumber="170" startId="7.[151,250,1811,1836]" targetBox="[151,1436,181,1753]" targetPageId="7">
<paragraph id="E26B3682FFE9FFF1FF24F881FCA6F8E9" blockId="7.[151,1437,1811,1908]" pageId="7" pageNumber="170">
<emphasis id="D0A0EA90FFE9FFF1FF24F881FECFF8B6" bold="true" box="[151,277,1811,1836]" pageId="7" pageNumber="170">FIGURE 4.</emphasis>
A, Photographs of specimens of 
<taxonomicName id="25D44D01FFE9FFF1FDC1F887FD31F8B6" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[626,747,1812,1836]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="7" pageNumber="170" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE9FFF1FDC1F887FD5BF8B6" box="[626,641,1813,1836]" italics="true" pageId="7" pageNumber="170">E</emphasis>
. 
<emphasis id="D0A0EA90FFE9FFF1FD22F886FD31F8B6" box="[657,747,1812,1836]" italics="true" pageId="7" pageNumber="170">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE9FFF1FD40F886FC9DF8B1" box="[755,839,1812,1835]" pageId="7" pageNumber="170" rank="species">sp. nov.</taxonomicNameLabel>
: female holotype from 6865 m (A top; USNM 1615729), juvenile paratype from 6865 m (bottom left; USNM 1615730), male paratype from 6010 m (bottom right; USNM 1615732). B, 
<taxonomicName id="25D44D01FFE9FFF1FF24F8CEFEB3F8EE" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[151,361,1884,1908]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="7" pageNumber="170" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE9FFF1FF24F8CEFEB3F8EE" box="[151,361,1884,1908]" italics="true" pageId="7" pageNumber="170">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE9FFF1FEC3F8CEFE1BF8E9" box="[368,449,1884,1907]" pageId="7" pageNumber="170" rank="species">sp. nov.</taxonomicNameLabel>
, mature female, holotype, USNM 1615729.
</paragraph>
</caption>
<caption id="B6AB660AFFE6FFFEFF24F81DFC24F86A" ID-DOI="http://doi.org/10.5281/zenodo.3697677" ID-Zenodo-Dep="3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="8" pageNumber="171" startId="8.[151,250,1935,1960]" targetBox="[210,1396,171,1910]" targetPageId="8">
<paragraph id="E26B3682FFE6FFFEFF24F81DFC24F86A" blockId="8.[151,1436,1935,2032]" pageId="8" pageNumber="171">
<emphasis id="D0A0EA90FFE6FFFEFF24F81DFECFF832" bold="true" box="[151,277,1935,1960]" pageId="8" pageNumber="171">FIGURE 5.</emphasis>
<taxonomicName id="25D44D01FFE6FFFEFEADF802FE28F832" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[286,498,1936,1960]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="8" pageNumber="171" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE6FFFEFEADF802FE28F832" box="[286,498,1936,1960]" italics="true" pageId="8" pageNumber="171">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE6FFFEFE48F803FD96F832" box="[507,588,1937,1960]" pageId="8" pageNumber="171" rank="species">sp. nov.</taxonomicNameLabel>
holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert.
</paragraph>
</caption>
<caption id="B6AB660AFFE7FFFFFF24F824FC12F869" ID-DOI="http://doi.org/10.5281/zenodo.3697679" ID-Zenodo-Dep="3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="9" pageNumber="172" startId="9.[151,250,1974,1999]" targetBox="[155,1418,190,1938]" targetPageId="9">
<paragraph id="E26B3682FFE7FFFFFF24F824FC12F869" blockId="9.[151,1436,1974,2035]" pageId="9" pageNumber="172">
<emphasis id="D0A0EA90FFE7FFFFFF24F824FEC8F855" bold="true" box="[151,274,1974,1999]" pageId="9" pageNumber="172">FIGURE 6.</emphasis>
<taxonomicName id="25D44D01FFE7FFFFFEAAF825FE31F855" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[281,491,1975,1999]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="9" pageNumber="172" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE7FFFFFEAAF825FE31F855" box="[281,491,1975,1999]" italics="true" pageId="9" pageNumber="172">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE7FFFFFE42F825FDE5F854" box="[497,575,1975,1998]" pageId="9" pageNumber="172" rank="species">sp. nov.</taxonomicNameLabel>
holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4.
</paragraph>
</caption>
<caption id="B6AB660AFFE4FFFCFF24F828FBCAF86D" ID-DOI="http://doi.org/10.5281/zenodo.3697681" ID-Zenodo-Dep="3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="10" pageNumber="173" startId="10.[151,250,1978,2003]" targetBox="[178,1381,195,1932]" targetPageId="10">
<paragraph id="E26B3682FFE4FFFCFF24F828FBCAF86D" blockId="10.[151,1436,1978,2039]" pageId="10" pageNumber="173">
<emphasis id="D0A0EA90FFE4FFFCFF24F828FECEF849" bold="true" box="[151,276,1978,2003]" pageId="10" pageNumber="173">FIGURE 7.</emphasis>
<taxonomicName id="25D44D01FFE4FFFCFEA8F829FE34F849" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[283,494,1979,2003]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="10" pageNumber="173" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE4FFFCFEA8F829FE34F849" box="[283,494,1979,2003]" italics="true" pageId="10" pageNumber="173">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE4FFFCFE5DF829FDE7F848" box="[494,573,1979,2002]" pageId="10" pageNumber="173" rank="species">sp. nov.</taxonomicNameLabel>
holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. 
<taxonomicName id="25D44D01FFE4FFFCFE8EF84DFDD5F86D" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[317,527,2015,2039]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="10" pageNumber="173" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE4FFFCFE8EF84DFDD5F86D" box="[317,527,2015,2039]" italics="true" pageId="10" pageNumber="173">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE4FFFCFDA6F84DFDBEF86C" box="[533,612,2015,2038]" pageId="10" pageNumber="173" rank="species">sp. nov.</taxonomicNameLabel>
paratype (USNM 1615730). E, epimeron.
</paragraph>
</caption>
<caption id="B6AB660AFFE5FFFDFF24F9C6FDD4F90B" ID-DOI="http://doi.org/10.5281/zenodo.3697683" ID-Zenodo-Dep="3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="11" pageNumber="174" startId="11.[151,250,1620,1645]" targetBox="[178,1406,204,1567]" targetPageId="11">
<paragraph id="E26B3682FFE5FFFDFF24F9C6FDD4F90B" blockId="11.[151,1436,1620,1681]" pageId="11" pageNumber="174">
<emphasis id="D0A0EA90FFE5FFFDFF24F9C6FECEF9F7" bold="true" box="[151,276,1620,1645]" pageId="11" pageNumber="174">FIGURE 8.</emphasis>
<taxonomicName id="25D44D01FFE5FFFDFEA8F9C7FE34F9F7" authority="Weston, 2020" authorityName="Weston" authorityYear="2020" box="[283,494,1621,1645]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="11" pageNumber="174" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE5FFFDFEA8F9C7FE34F9F7" box="[283,494,1621,1645]" italics="true" pageId="11" pageNumber="174">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE5FFFDFE46F9C7FD9FF9F6" box="[501,581,1621,1644]" pageId="11" pageNumber="174" rank="species">sp. nov.</taxonomicNameLabel>
holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert.
</paragraph>
</caption>
<paragraph id="E26B3682FFE5FFFDFF74F92CFC48F8DF" blockId="11.[151,1437,1726,2042]" pageId="11" pageNumber="174">
<emphasis id="D0A0EA90FFE5FFFDFF74F92CFE58F943" bold="true" box="[199,386,1726,1753]" pageId="11" pageNumber="174">
HEAD (
<figureCitation id="7AEF2A07FFE5FFFDFE9AF92CFEA9F943" box="[297,371,1726,1753]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5</figureCitation>
):
</emphasis>
rostrum absent; ventral corner of eye rounded and obliquely pointing backwards (
<figureCitation id="7AEF2A07FFE5FFFDFA86F92DFA4AF943" box="[1333,1424,1726,1753]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5C</figureCitation>
). 
<emphasis id="D0A0EA90FFE5FFFDFF24F976FED1F967" box="[151,267,1763,1790]" italics="true" pageId="11" pageNumber="174">Antenna 1</emphasis>
short, 0.1x as long as body length; accessory flagellum 12-articulate; primary flagellum 28-articulate; callynophore well-developed; calceoli absent (
<figureCitation id="7AEF2A07FFE5FFFDFD1BF895FCDEF8BB" box="[680,772,1798,1825]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5A</figureCitation>
). 
<emphasis id="D0A0EA90FFE5FFFDFCAAF89AFC57F8BB" box="[793,909,1799,1826]" italics="true" pageId="11" pageNumber="174">Antenna 2</emphasis>
medium length, 0.3x as long as body, 1.8x as long as antenna 1; flagellum 59-articulate; calceoli absent (
<figureCitation id="7AEF2A07FFE5FFFDFC9EF8B9FC5FF8DF" box="[813,901,1834,1861]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5B</figureCitation>
).
</paragraph>
<paragraph id="E26B3682FFE5FFFAFF74F8DCFA55FF61" blockId="11.[151,1437,1726,2042]" lastBlockId="12.[151,1437,152,2015]" lastPageId="12" lastPageNumber="175" pageId="11" pageNumber="174">
<emphasis id="D0A0EA90FFE5FFFDFF74F8DCFD87F8F3" bold="true" box="[199,605,1870,1897]" pageId="11" pageNumber="174">
MOUTHPART BUNDLE (
<figureCitation id="7AEF2A07FFE5FFFDFDB4F8DCFD94F8F3" box="[519,590,1870,1897]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5</figureCitation>
):
</emphasis>
<emphasis id="D0A0EA90FFE5FFFDFDD7F8DDFD15F8F3" box="[612,719,1871,1897]" italics="true" pageId="11" pageNumber="174">Mandible</emphasis>
left lacinia mobilis a long slender distally cuspidate robust seta; setal row left with 13 short, slender, robust setae; molar large, setose, vestigial distal triturating patch; palp article length ratio 1: 3.2: 2.6, article 2 posteriorly not expanded and distally not tapering, 3.4x as long as wide; article 3 blade-like (
<figureCitation id="7AEF2A07FFE5FFFDFEA6F829FEB9F84F" box="[277,355,1978,2005]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="11" pageNumber="174">Fig. 5I</figureCitation>
). 
<emphasis id="D0A0EA90FFE5FFFDFEC5F829FE3BF84F" box="[374,481,1979,2005]" italics="true" pageId="11" pageNumber="174">Maxilla 1</emphasis>
inner plate with nine apical and sub-apical plumose setae; outer plate with an 8/3 setal crown arrangement; palp longer than outer plate, 2-articulate, seven sub-apical and apical setae with one being a flag seta (
<figureCitation id="7AEF2A07FFE2FFFAFF62FF0BFEF1FF29" box="[209,299,152,179]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="12" pageNumber="175">Fig. 5H</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFE8DFF0BFE73FF29" box="[318,425,153,179]" italics="true" pageId="12" pageNumber="175">Maxilla 2</emphasis>
inner and outer plates broad, inner plate 0.6x shorter than outer plate (
<figureCitation id="7AEF2A07FFE2FFFAFB05FF0BFACAFF29" box="[1206,1296,152,179]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="12" pageNumber="175">Fig. 5G</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFA90FF0BFA46FF29" box="[1315,1436,153,179]" italics="true" pageId="12" pageNumber="175">Maxilliped</emphasis>
inner plate large, sub-rectangular, four apical protruding nodular setae; outer plate subovate, with 12 apical setose setae; palp large and well-developed; dactylus well-developed, unguis present, six small apical setae (
<figureCitation id="7AEF2A07FFE2FFFAFAB9FF73FA58FF61" box="[1290,1410,224,251]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="12" pageNumber="175">Fig. 5D, F</figureCitation>
).
</paragraph>
<paragraph id="E26B3682FFE2FFFAFF74FE96FD99FBAD" blockId="12.[151,1437,152,2015]" pageId="12" pageNumber="175">
<emphasis id="D0A0EA90FFE2FFFAFF74FE96FE15FE85" bold="true" box="[199,463,260,287]" pageId="12" pageNumber="175">
PEREON (
<figureCitation id="7AEF2A07FFE2FFFAFEFEFE96FE45FE85" box="[333,415,260,287]" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="12" pageNumber="175">Figs. 6</figureCitation>
, 
<figureCitation id="7AEF2A07FFE2FFFAFE1CFE96FE1AFE85" box="[431,448,260,287]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">7</figureCitation>
):
</emphasis>
<emphasis id="D0A0EA90FFE2FFFAFE6AFE97FDB4FE85" box="[473,622,261,287]" italics="true" pageId="12" pageNumber="175">Gnathopod 1</emphasis>
coxa very weakly anteriorly concave, anteroventral margin with setae; palm crenulate, 0.4x as long as width of propodus, defined by one robust seta at base of palm and another robust seta at end of palm that is 2.6x longer; dactylus curved posteriorly, one long anterodistal seta, unguis present (
<figureCitation id="7AEF2A07FFE2FFFAFA8DFEDFFF76FE11" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="12" pageNumber="175">Fig. 6A, B</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFF70FEE3FE8DFE11" box="[195,343,369,395]" italics="true" pageId="12" pageNumber="175">Gnathopod 2</emphasis>
subchelate, coxa obovate, broad ventrally and weakly curved; propodus elongate, not expanded distally, 6.1x as long as wide; propodus 2.7x as long as wide, moderately expanded distally; palm crenulate, distal end defined by three robust setae; dactylus not reaching palmar corner, curved posteriorly, unguis present, one long anterodistal seta (
<figureCitation id="7AEF2A07FFE2FFFAFEEFFE4FFE0CFE6D" box="[348,470,477,503]" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="12" pageNumber="175">Fig. 6A, B</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFE5FFE4FFDB7FE6D" box="[492,621,477,503]" italics="true" pageId="12" pageNumber="175">Pereopod 3</emphasis>
coxa sub-rectangular, 2.0x as long as wide, setae on surface of coxa and along ventral and posterior margins; basis weakly expanded posteriorly, 2.7x as long as wide; merus expanded anteriorly, tuft of setae on anteroventral corner; propodus 4.8x as long as wide; dactylus short, 0.4x as long as propodus, unguis present (
<figureCitation id="7AEF2A07FFE2FFFAFEFEFDDBFE72FDFE" box="[333,424,585,612]" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="12" pageNumber="175">Fig. 6C</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFE0DFDDBFD9BFDF9" box="[446,577,585,611]" italics="true" pageId="12" pageNumber="175">Pereopod 4</emphasis>
coxa broad, 1.2x as long as wide, 1.1x length of coxa 3, junction between anterior and ventral border bluntly angular (sub-rectangular), ventral border straight, posteroventral border straight and weakly oblique; leg almost identical with pereopod 3 (
<figureCitation id="7AEF2A07FFE2FFFAFC9FFD03FC5DFD36" box="[812,903,657,684]" captionStart="FIGURE 6" captionStartId="9.[151,250,1974,1999]" captionTargetBox="[155,1418,190,1938]" captionTargetId="figure@9.[151,1436,166,1956]" captionTargetPageId="9" captionText="FIGURE 6. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left gnathopod 1; B, chela of left gnathopod 1; C, left gnathopod 2; D, chela of left gnathopod 2; E, left pereopod 3; F, left pereopod 4." figureDoi="http://doi.org/10.5281/zenodo.3697679" httpUri="https://zenodo.org/record/3697679/files/figure.png" pageId="12" pageNumber="175">Fig. 6D</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFC28FD03FBC6FD31" box="[923,1052,657,683]" italics="true" pageId="12" pageNumber="175">Pereopod 5</emphasis>
coxa bilobate, posterior lobe 1.3x longer and 1.6x wider than anterior lobe, ventral border of posterior lobe sub-triangular; basis expanded posteriorly, posterior margin smooth; merus broadly expanded posteriorly, 1.5x as long as wide, curved posterior margin; propodus slender, 6.2x as long as wide, seven groups of robust setae on the anterior margin; dactylus short, 0.4x as long as propodus, unguis present (
<figureCitation id="7AEF2A07FFE2FFFAFE51FCB3FDE7FCA1" box="[482,573,801,827]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7A</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFDE1FCB3FD09FCA1" box="[594,723,801,827]" italics="true" pageId="12" pageNumber="175">Pereopod 6</emphasis>
coxa subquadrate, posterior margin weakly bilobate or weakly concave; basis expanded posteriorly, posterior margin distinctly crenate; merus broadly expanded posteriorly, 1.7x as long as wide, convex posterior margin; propodus slender, 5.9x as long as wide, eight groups of robust setae on the anterior margin; dactylus slender, short, 0.3x as long as propodus, unguis present (
<figureCitation id="7AEF2A07FFE2FFFAFBDEFC1FFB1DFC3D" box="[1133,1223,909,935]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7B</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFB6EFC1FFA85FC3D" box="[1245,1375,909,935]" italics="true" pageId="12" pageNumber="175">Pereopod 7</emphasis>
coxa sub-rectangular; basis with posterior border crenulate and strongly expanded, distal lobe moderately protruding; merus broadly expanded posteriorly, 1.6x as long as wide, convex posterior margin; propodus with normal stoutness, 5.6x as long as wide, eight groups of robust setae on the anterior margin; dactylus slender, short, 0.3x as long as propodus, unguis present (
<figureCitation id="7AEF2A07FFE2FFFAFE6DFB8FFDECFBAD" box="[478,566,1053,1079]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7C</figureCitation>
).
</paragraph>
<paragraph id="E26B3682FFE2FFFAFF74FBD2FAB1FA7D" blockId="12.[151,1437,152,2015]" pageId="12" pageNumber="175">
<emphasis id="D0A0EA90FFE2FFFAFF74FBD2FD46FBC1" bold="true" box="[199,668,1088,1115]" pageId="12" pageNumber="175">
PLEON AND UROSOME (
<figureCitation id="7AEF2A07FFE2FFFAFDAAFBD2FDB6FBC1" box="[537,620,1088,1115]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Figs. 7</figureCitation>
, 
<figureCitation id="7AEF2A07FFE2FFFAFDCFFBD2FD57FBC1" box="[636,653,1088,1115]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="12" pageNumber="175">8</figureCitation>
):
</emphasis>
<emphasis id="D0A0EA90FFE2FFFAFD14FBD0FCF6FBC1" box="[679,812,1089,1115]" italics="true" pageId="12" pageNumber="175">Epimeron 1</emphasis>
anteroventral corner rounded with long slender setae; posteroventral corner produced into a small tooth. 
<emphasis id="D0A0EA90FFE2FFFAFD7BFBF4FC90FBE5" box="[712,842,1125,1151]" italics="true" pageId="12" pageNumber="175">Epimeron 2</emphasis>
anteroventral margin lined with short fine setae; posteroventral corner produced into a strong tooth. 
<emphasis id="D0A0EA90FFE2FFFAFD14FB18FCF2FB39" box="[679,808,1161,1187]" italics="true" pageId="12" pageNumber="175">Epimeron 3</emphasis>
ventral margin lined with long fine setae, weakly curved (
<figureCitation id="7AEF2A07FFE2FFFAFF13FB3FFF23FB5D" box="[160,249,1197,1223]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7D</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFEBEFB3CFE4DFB5D" box="[269,407,1197,1223]" italics="true" pageId="12" pageNumber="175">Urosomite 1</emphasis>
with anterodorsal notch (
<figureCitation id="7AEF2A07FFE2FFFAFD07FB3FFCD4FB5D" box="[692,782,1197,1223]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7D</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFC91FB3FFC57FB5D" box="[802,909,1197,1223]" italics="true" pageId="12" pageNumber="175">Uropod 1</emphasis>
peduncle with one apicomedial setae; inner ramus subequal in length to outer ramus; outer ramus 0.85x as long as peduncle; outer ramus with 18 lateral and eight medial spine-like setae; inner ramus with 20 lateral and 11 medial spine-like setae (
<figureCitation id="7AEF2A07FFE2FFFAFBE2FB67FB76FA95" box="[1105,1196,1269,1295]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="12" pageNumber="175">Fig. 8A</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFB71FB67FAF5FA95" box="[1218,1327,1269,1295]" italics="true" pageId="12" pageNumber="175">Uropod 2</emphasis>
peduncle with one apicomedial setae; inner ramus subequal in length (0.9x) to outer ramus; outer ramus subequal in length to peduncle outer ramus with 20 lateral and three medial spine-like setae; inner ramus with seven lateral and 16 medial spine-like setae (
<figureCitation id="7AEF2A07FFE2FFFAFEE4FAF3FE6AFAE1" box="[343,432,1377,1403]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="12" pageNumber="175">Fig. 8B</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFE75FAF3FDE9FAE1" box="[454,563,1377,1403]" italics="true" pageId="12" pageNumber="175">Uropod 3</emphasis>
inner ramus subequal in length to article 1 of outer ramus; article 2 of outer rami short, 0.05x length of article 1; setae of distolateral angle of peduncle of normal length and stoutness; medial margins of both rami with plumose setae (
<figureCitation id="7AEF2A07FFE2FFFAFDDDFA3BFD1CFA59" box="[622,710,1449,1475]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="12" pageNumber="175">Fig. 8C</figureCitation>
). 
<emphasis id="D0A0EA90FFE2FFFAFD69FA3BFCF8FA59" box="[730,802,1449,1475]" italics="true" pageId="12" pageNumber="175">Telson</emphasis>
70% cleft, pair of apical setae on each lobe parallel with beginning of cleft, distal margin with a single apical seta on right lobe, distal end of left lob missing (
<figureCitation id="7AEF2A07FFE2FFFAFAB7FA5FFA84FA7D" box="[1284,1374,1485,1511]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="12" pageNumber="175">Fig. 8D</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE2FFFAFF74FA62FD02F8D5" pageId="12" pageNumber="175" type="discussion">
<paragraph id="E26B3682FFE2FFFAFF74FA62FD02F8D5" blockId="12.[151,1437,152,2015]" pageId="12" pageNumber="175">
<emphasis id="D0A0EA90FFE2FFFAFF74FA62FE98F991" bold="true" box="[199,322,1520,1547]" pageId="12" pageNumber="175">Variations</emphasis>
. As with other species of 
<taxonomicName id="25D44D01FFE2FFFAFDD0FA63FD3BF991" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[611,737,1521,1547]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE2FFFAFDD0FA63FD3BF991" box="[611,737,1521,1547]" italics="true" pageId="12" pageNumber="175">Eurythenes</emphasis>
</taxonomicName>
, there appears to be very little sexual dimorphism. In part, this could be limited to having a single male specimen. The mature male 
<typeStatus id="3D6F8820FFE2FFFAFC3FF987FC36F9B5" box="[908,1004,1557,1583]" pageId="12" pageNumber="175" type="paratype">paratype</typeStatus>
(USNM 1615732) has calceoli present on both antenna 1 and antenna 2. Both antennae are shorter than the 
<typeStatus id="3D6F8820FFE2FFFAFC36F9ABFC3DF9C9" box="[901,999,1593,1619]" pageId="12" pageNumber="175" type="holotype">holotype</typeStatus>
with antenna 1 accessory flagellum being 10-articulate, antenna 1 25-articulate, and antenna 2 54-articulate. Additionally, the maxilliped inner plate of the male 
<typeStatus id="3D6F8820FFE2FFFAFF66F913FEEFF901" box="[213,309,1665,1691]" pageId="12" pageNumber="175" type="paratype">paratype</typeStatus>
has three apical protruding nodular setae, specifically lacking the third setae present on the 
<typeStatus id="3D6F8820FFE2FFFAFA89F913FA46F901" box="[1338,1436,1665,1691]" pageId="12" pageNumber="175" type="holotype">holotype</typeStatus>
(
<figureCitation id="7AEF2A07FFE2FFFAFF13F937FF2DF925" box="[160,247,1700,1727]" captionStart="FIGURE 5" captionStartId="8.[151,250,1935,1960]" captionTargetBox="[210,1396,171,1910]" captionTargetId="figure@8.[170,1416,163,1917]" captionTargetPageId="8" captionText="FIGURE 5. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left antenna 1; B, left antenna 2; C, head; D, left maxilliped with inner plate removed; E, maxilliped dactylus; F, left maxilliped inner plate (medio-facial spines not shown); G, left maxilla 2; H, left maxilla 1 (palp not flattened); I, left mandible with molar insert." figureDoi="http://doi.org/10.5281/zenodo.3697677" httpUri="https://zenodo.org/record/3697677/files/figure.png" pageId="12" pageNumber="175">Fig. 5F</figureCitation>
). There were differences present in the juvenile 
<typeStatus id="3D6F8820FFE2FFFAFC91F937FC58F925" box="[802,898,1701,1727]" pageId="12" pageNumber="175" type="paratype">paratype</typeStatus>
(USNM 1615730) that included typical cohort differences among 
<taxonomicName id="25D44D01FFE2FFFAFEDEF95BFE31F979" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[365,491,1737,1763]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE2FFFAFEDEF95BFE31F979" box="[365,491,1737,1763]" italics="true" pageId="12" pageNumber="175">Eurythenes</emphasis>
</taxonomicName>
, such as fewer setae on pereopods and uropods and reduced articulation on antennae (antenna 1 accessory flagellum 7-articulate, antenna 1 15-articulate, and antenna 2 38-articulate). In addition, the juvenile 
<typeStatus id="3D6F8820FFE2FFFAFF44F883FE8DF8B1" box="[247,343,1809,1835]" pageId="12" pageNumber="175" type="paratype">paratype</typeStatus>
had more pronounced and raised dorsal carination than on the adults (
<figureCitation id="7AEF2A07FFE2FFFAFBE8F883FB6BF8B1" box="[1115,1201,1809,1835]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="12" pageNumber="175">Fig. 7E</figureCitation>
). This difference was present among all the juvenile specimens observed.
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE2FFFBFF74F8CAFCE1FCA6" lastPageId="13" lastPageNumber="176" pageId="12" pageNumber="175" type="diagnosis">
<paragraph id="E26B3682FFE2FFFBFF74F8CAFE68FDDA" blockId="12.[151,1437,152,2015]" lastBlockId="13.[151,1437,153,2015]" lastPageId="13" lastPageNumber="176" pageId="12" pageNumber="175">
<emphasis id="D0A0EA90FFE2FFFAFF74F8CAFE09F8E9" bold="true" box="[199,467,1880,1907]" pageId="12" pageNumber="175">Differential Diagnosis.</emphasis>
As highlighted in 
<bibRefCitation id="86454B73FFE2FFFAFD10F8CBFBB0F8E9" author="d'Udekem d'Acoz, C. &amp; Havermans, C." box="[675,1130,1880,1907]" pageId="12" pageNumber="175" pagination="1 - 80" refId="ref9131" refString="d'Udekem d'Acoz, C. &amp; Havermans, C. (2015) Contribution to the systematics of the genus Eurythenes S. I. Smith in Scudder, 1882 (Crustacea: Amphipoda: Lysianassoidea: Eurytheneidae). Zootaxa, 3971 (1), 1 - 80. https: // doi. org / 10.11646 / zootaxa. 3971.1.1" type="journal article" year="2015">d’Udekem d’Acoz &amp; Havermans (2015)</bibRefCitation>
, the morphological characteristics that separate and define the species within the 
<taxonomicName id="25D44D01FFE2FFFAFD4BF8EFFC9CF80D" baseAuthorityName="Lichtenstein in Mandt" baseAuthorityYear="1822" box="[760,838,1917,1943]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="species" species="gryllus">
<emphasis id="D0A0EA90FFE2FFFAFD4BF8EFFC9CF80D" box="[760,838,1917,1943]" italics="true" pageId="12" pageNumber="175">gryllus</emphasis>
</taxonomicName>
-complex are hard to observe and should be used with caution. 
<taxonomicName id="25D44D01FFE2FFFAFF44F833FE3AF821" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[247,480,1953,1979]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE2FFFAFF44F833FE3AF821" box="[247,480,1953,1979]" italics="true" pageId="12" pageNumber="175">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE2FFFAFE54F833FDE7F821" box="[487,573,1953,1979]" pageId="12" pageNumber="175" rank="species">sp. nov.</taxonomicNameLabel>
is a member of the 
<taxonomicName id="25D44D01FFE2FFFAFCA9F833FCB2F821" baseAuthorityName="Lichtenstein in Mandt" baseAuthorityYear="1822" box="[794,872,1953,1979]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="species" species="gryllus">
<emphasis id="D0A0EA90FFE2FFFAFCA9F833FCB2F821" box="[794,872,1953,1979]" italics="true" pageId="12" pageNumber="175">gryllus</emphasis>
</taxonomicName>
-complex morphologically and genetically. Nevertheless, there is a combination of characters that are unique to 
<taxonomicName id="25D44D01FFE2FFFAFCE7F854FC02F845" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[852,984,1989,2015]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="12" pageNumber="175" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE2FFFAFCE7F854FCBFF845" box="[852,869,1990,2015]" italics="true" pageId="12" pageNumber="175">E</emphasis>
. 
<emphasis id="D0A0EA90FFE2FFFAFCC7F857FC02F845" box="[884,984,1989,2015]" italics="true" pageId="12" pageNumber="175">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE2FFFAFC6CF857FBEFF845" box="[991,1077,1989,2015]" pageId="12" pageNumber="175" rank="species">sp. nov.</taxonomicNameLabel>
and allow it to be distinguished from the morphologically similar species 
<taxonomicName id="25D44D01FFE3FFFBFDDEFF08FCC9FF29" authorityName="d'Udekem d'Acoz &amp; Havermans" authorityYear="2015" box="[621,787,153,179]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="andhakarae">
<emphasis id="D0A0EA90FFE3FFFBFDDEFF08FCC9FF29" box="[621,787,153,179]" italics="true" pageId="13" pageNumber="176">E. andhakarae</emphasis>
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFC92FF08FC0CFF29" baseAuthorityName="H. Milne Edwards" baseAuthorityYear="1848" box="[801,982,153,179]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="magellanicus">
<emphasis id="D0A0EA90FFE3FFFBFC92FF08FC0CFF29" box="[801,982,153,179]" italics="true" pageId="13" pageNumber="176">E. magellanicus</emphasis>
</taxonomicName>
, and 
<emphasis id="D0A0EA90FFE3FFFBFBA7FF08FB6AFF29" box="[1044,1200,153,179]" italics="true" pageId="13" pageNumber="176">
<taxonomicName id="25D44D01FFE3FFFBFBA7FF08FB76FF29" authorityName="Narahara-Nakano, Nakano &amp; Tomikawa" authorityYear="2017" box="[1044,1196,153,179]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="aequilatus">E. aequilatus</taxonomicName>
.
</emphasis>
The most distinctive characteristics are the robust, spine-like setae on rami of uropod 1 and 2 (
<figureCitation id="7AEF2A07FFE3FFFBFC6BFF2FFB8BFF4D" box="[984,1105,189,215]" captionStart="FIGURE 8" captionStartId="11.[151,250,1620,1645]" captionTargetBox="[178,1406,204,1567]" captionTargetId="figure@11.[151,1436,166,1602]" captionTargetPageId="11" captionText="FIGURE 8. Eurythenes plasticus sp. nov. holotype (USNM 1615729). A, left uropod 1; B, left uropod 2; C, left uropod 3, D, telson with right distal margin insert." figureDoi="http://doi.org/10.5281/zenodo.3697683" httpUri="https://zenodo.org/record/3697683/files/figure.png" pageId="13" pageNumber="176">Fig. 8A, B</figureCitation>
) and the lobes of pereopod 5 coxa (
<figureCitation id="7AEF2A07FFE3FFFBFF6FFF73FEECFF61" box="[220,310,225,251]" captionStart="FIGURE 7" captionStartId="10.[151,250,1978,2003]" captionTargetBox="[178,1381,195,1932]" captionTargetId="figure@10.[158,1430,166,1960]" captionTargetPageId="10" captionText="FIGURE 7. Eurythenes plasticussp. nov. holotype (USNM 1615729). A, left pereopod 5; B, left pereopod 6; C, left pereopod 7; D, epimeron. Eurythenes plasticus sp. nov. paratype (USNM 1615730). E, epimeron." figureDoi="http://doi.org/10.5281/zenodo.3697681" httpUri="https://zenodo.org/record/3697681/files/figure.png" pageId="13" pageNumber="176">Fig. 7A</figureCitation>
), here being unequal, which is novel within 
<taxonomicName id="25D44D01FFE3FFFBFC99FF73FC72FF61" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[810,936,225,251]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFC99FF73FC72FF61" box="[810,936,225,251]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
. 
<taxonomicName id="25D44D01FFE3FFFBFC04FF73FB7AFF61" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[951,1184,225,251]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFC04FF73FB7AFF61" box="[951,1184,225,251]" italics="true" pageId="13" pageNumber="176">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFB14FF73FB25FF61" box="[1191,1279,225,251]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
can be differentiated from 
<taxonomicName id="25D44D01FFE3FFFBFE81FE94FE0CFE85" authorityName="d'Udekem d'Acoz &amp; Havermans" authorityYear="2015" box="[306,470,261,287]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="andhakarae">
<emphasis id="D0A0EA90FFE3FFFBFE81FE94FE0CFE85" box="[306,470,261,287]" italics="true" pageId="13" pageNumber="176">E. andhakarae</emphasis>
</taxonomicName>
with article 2 of the mandible palp being narrow (instead of expanded), four protruding nodular spines on the inner plate of the maxilliped (versus three non-protruding), and straight ventral border of coxa 4 (opposed to curved). 
<taxonomicName id="25D44D01FFE3FFFBFE25FEDFFDA4FEFD" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[406,638,333,359]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFE25FEDFFDA4FEFD" box="[406,638,333,359]" italics="true" pageId="13" pageNumber="176">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFD30FEDFFD03FEFD" box="[643,729,333,359]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
can be separated from 
<taxonomicName id="25D44D01FFE3FFFBFC64FEDCFB50FEFD" baseAuthorityName="H. Milne Edwards" baseAuthorityYear="1848" box="[983,1162,333,359]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="magellanicus">
<emphasis id="D0A0EA90FFE3FFFBFC64FEDCFB50FEFD" box="[983,1162,333,359]" italics="true" pageId="13" pageNumber="176">E. magellanicus</emphasis>
</taxonomicName>
with a long gnathopod 1 palm (instead of short), a straight ventral border of coxa 4 (opposed to curved), a subquadrate posteroventral corner in epimeron 3 (instead of bearing a small tooth), and the rami of uropod 1 and 2 being subequal (opposed to uropod 2 outer ramus being shorter than inner ramus and uropod 1 outer ramus being longer than inner ramus). 
<taxonomicName id="25D44D01FFE3FFFBFAADFE2BFF21FE6D" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFAADFE2BFF21FE6D" italics="true" pageId="13" pageNumber="176">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFEB2FE4FFE8CFE6D" box="[257,342,477,503]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
can also be distinguished from 
<taxonomicName id="25D44D01FFE3FFFBFD07FE4CFC9DFE6D" authorityName="Narahara-Nakano, Nakano &amp; Tomikawa" authorityYear="2017" box="[692,839,477,503]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="aequilatus">
<emphasis id="D0A0EA90FFE3FFFBFD07FE4CFC9DFE6D" box="[692,839,477,503]" italics="true" pageId="13" pageNumber="176">E. aequilatus</emphasis>
</taxonomicName>
by its eyes with a variable width (opposed to constant width), the outer plate of maxilla 1 with 8/3 crown arrangement (instead of 9/3 arrangement), and a long gnathopod 1 palm (instead of short).
</paragraph>
<paragraph id="E26B3682FFE3FFFBFF74FDDAFCE1FCA6" blockId="13.[151,1437,153,2015]" pageId="13" pageNumber="176">
<emphasis id="D0A0EA90FFE3FFFBFF74FDDAFDB8FDF9" bold="true" box="[199,610,584,611]" pageId="13" pageNumber="176">Habitat, Distribution and Biology.</emphasis>
<taxonomicName id="25D44D01FFE3FFFBFDD9FDDBFC8EFDF9" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[618,852,585,611]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFDD9FDDBFC8EFDF9" box="[618,852,585,611]" italics="true" pageId="13" pageNumber="176">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFCEFFDDBFC6EFDF9" box="[860,948,585,611]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
was collected from the upper hadal depths of the Mariana Trench, between 6010 and 
<quantity id="252C9B67FFE3FFFBFDCBFDFFFD0BFD1D" box="[632,721,621,647]" metricMagnitude="3" metricUnit="m" metricValue="6.949" pageId="13" pageNumber="176" unit="m" value="6949.0">6949 m</quantity>
. Similar to sister species within the genus, 
<taxonomicName id="25D44D01FFE3FFFBFB09FDFCFAE4FD1D" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[1210,1342,621,647]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFB09FDFCFAE4FD1D" box="[1210,1342,621,647]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFAF6FDFFFA47FD1D" box="[1349,1437,621,647]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
is a benthic scavenger, as individuals of multiple cohorts entered the baited traps. 
<taxonomicName id="25D44D01FFE3FFFBFB8AFD03FAF9FD31" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[1081,1315,657,683]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFB8AFD03FAF9FD31" box="[1081,1315,657,683]" italics="true" pageId="13" pageNumber="176">Eurythenes plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFA99FD03FA58FD31" box="[1322,1410,657,683]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
is a member of a wider scavenging amphipod community comprised of 
<taxonomicName id="25D44D01FFE3FFFBFC08FD27FBE4FD55" authorityName="Chevreux" authorityYear="1899" box="[955,1086,693,719]" class="Malacostraca" family="Lysianassidae" genus="Alicella" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gigantea">
<emphasis id="D0A0EA90FFE3FFFBFC08FD27FBE4FD55" box="[955,1086,693,719]" italics="true" pageId="13" pageNumber="176">A. gigantea</emphasis>
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFBFCFD27FE36FD69" authority="(Birstein &amp; Vinogradov, 1958)" baseAuthorityName="Birstein &amp; Vinogradov" baseAuthorityYear="1958" class="Malacostraca" family="Scopelocheiridae" genus="Bathycallisoma" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="schellenbergi">
<emphasis id="D0A0EA90FFE3FFFBFBFCFD27FA46FD55" box="[1103,1436,693,719]" italics="true" pageId="13" pageNumber="176">Bathycallisoma schellenbergi</emphasis>
(Birstein &amp; Vinogradov, 1958)
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFE44FD4BFC9DFD69" authority="Dahl, 1959" authorityName="Dahl" authorityYear="1959" box="[503,839,728,755]" class="Malacostraca" family="Uristidae" genus="Hirondellea" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="dubia">
<emphasis id="D0A0EA90FFE3FFFBFE44FD4BFD19FD69" box="[503,707,729,755]" italics="true" pageId="13" pageNumber="176">Hirondellea dubia</emphasis>
Dahl, 1959
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFCE2FD48FC75FD69" baseAuthorityName="Birstein &amp; Vinogradov" baseAuthorityYear="1955" box="[849,943,730,755]" class="Malacostraca" family="Uristidae" genus="Hirondellea" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gigas">
<emphasis id="D0A0EA90FFE3FFFBFCE2FD48FC75FD69" box="[849,943,730,755]" italics="true" pageId="13" pageNumber="176">H. gigas</emphasis>
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFC08FD4BFEC8FC8D" authority="Shulenberger &amp; Barnard, 1976" authorityName="Shulenberger &amp; Barnard" authorityYear="1976" class="Malacostraca" family="Lysianassidae" genus="Paralicella" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="caperesca">
<emphasis id="D0A0EA90FFE3FFFBFC08FD4BFB75FD69" box="[955,1199,729,755]" italics="true" pageId="13" pageNumber="176">Paralicella caperesca</emphasis>
Shulenberger &amp; Barnard, 1976
</taxonomicName>
, 
<taxonomicName id="25D44D01FFE3FFFBFEADFD6FFE2FFC8D" box="[286,501,765,791]" class="Malacostraca" family="Lysianassidae" genus="Paralicella" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="tenuipe">
<emphasis id="D0A0EA90FFE3FFFBFEADFD6FFE2FFC8D" box="[286,501,765,791]" italics="true" pageId="13" pageNumber="176">Paralicella tenuipe</emphasis>
</taxonomicName>
s Chevreux, 1908, and 
<taxonomicName id="25D44D01FFE3FFFBFD49FD6FFA91FC82" authority="(Birstein &amp; Vinogradov, 1963)" baseAuthorityName="Birstein &amp; Vinogradov" baseAuthorityYear="1963" box="[762,1355,765,792]" class="Malacostraca" family="Valettiopsidae" genus="Valettietta" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="anacantha">
<emphasis id="D0A0EA90FFE3FFFBFD49FD6FFC33FC8D" box="[762,1001,765,791]" italics="true" pageId="13" pageNumber="176">Valettietta anacantha</emphasis>
(Birstein &amp; Vinogradov, 1963)
</taxonomicName>
, which were concurrently recovered in the traps (data unpublished).
</paragraph>
</subSubSection>
<subSubSection id="AACE6509FFE3FFF8FF74FCD6FEB2FD69" lastPageId="14" lastPageNumber="177" pageId="13" pageNumber="176" type="discussion">
<paragraph id="E26B3682FFE3FFFBFF74FCD6FE9FFCC5" blockId="13.[151,1437,153,2015]" box="[199,325,836,863]" pageId="13" pageNumber="176">
<emphasis id="D0A0EA90FFE3FFFBFF74FCD6FE9FFCC5" bold="true" box="[199,325,836,863]" pageId="13" pageNumber="176">Discussion</emphasis>
</paragraph>
<paragraph id="E26B3682FFE3FFFBFF74FCFBFC59FC75" blockId="13.[151,1437,153,2015]" pageId="13" pageNumber="176">
The salient finding of this study is the paired molecular and morphological identification approaches provided congruent evidence that 
<taxonomicName id="25D44D01FFE3FFFBFE02FC1CFDEDFC3D" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[433,567,909,935]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFE02FC1CFDEDFC3D" box="[433,567,909,935]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFDF3FC1FFD40FC3D" box="[576,666,909,935]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
represents an undescribed species within 
<taxonomicName id="25D44D01FFE3FFFBFBCDFC1FFB26FC3D" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[1150,1276,909,935]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFBCDFC1FFB26FC3D" box="[1150,1276,909,935]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
. Further, as a scavenger at upper hadal depths (
<quantity id="252C9B67FFE3FFFBFDA2FC23FD65FC51" box="[529,703,945,971]" metricMagnitude="3" metricUnit="m" metricValue="6.4795" metricValueMax="6.949" metricValueMin="6.01" pageId="13" pageNumber="176" unit="m" value="6479.5" valueMax="6949.0" valueMin="6010.0">6010 – 6949 m</quantity>
) in the Mariana Trench, 
<taxonomicName id="25D44D01FFE3FFFBFC69FC20FB84FC51" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[986,1118,945,971]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFC69FC20FB84FC51" box="[986,1118,945,971]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFBD5FC23FB67FC51" box="[1126,1213,945,971]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
is not exempt from ingesting microplastics that are bioavailable within the hadal zone.
</paragraph>
<paragraph id="E26B3682FFE3FFFBFF74FC6BFD44FAA9" blockId="13.[151,1437,153,2015]" pageId="13" pageNumber="176">
In comparison to described 
<taxonomicName id="25D44D01FFE3FFFBFE4DFC6BFDA6FB89" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[510,636,1017,1043]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFE4DFC6BFDA6FB89" box="[510,636,1017,1043]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
species, 
<taxonomicName id="25D44D01FFE3FFFBFD51FC68FCBCFB89" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[738,870,1017,1043]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFD51FC68FD29FB89" box="[738,755,1018,1043]" italics="true" pageId="13" pageNumber="176">E</emphasis>
. 
<emphasis id="D0A0EA90FFE3FFFBFCB1FC6BFCBCFB89" box="[770,870,1017,1043]" italics="true" pageId="13" pageNumber="176">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFCDFFC6BFC19FB89" box="[876,963,1017,1043]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
was placed as part of the 
<taxonomicName id="25D44D01FFE3FFFBFB56FC6BFAE9FB89" baseAuthorityName="Lichtenstein in Mandt" baseAuthorityYear="1822" box="[1253,1331,1017,1043]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gryllus">
<emphasis id="D0A0EA90FFE3FFFBFB56FC6BFAE9FB89" box="[1253,1331,1017,1043]" italics="true" pageId="13" pageNumber="176">gryllus</emphasis>
</taxonomicName>
-complex and most closely related to the abyssal 
<taxonomicName id="25D44D01FFE3FFFBFDFCFB8CFCDEFBAD" baseAuthorityName="H. Milne Edwards" baseAuthorityYear="1848" box="[591,772,1053,1079]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="magellanicus">
<emphasis id="D0A0EA90FFE3FFFBFDFCFB8CFCDEFBAD" box="[591,772,1053,1079]" italics="true" pageId="13" pageNumber="176">E. magellanicus</emphasis>
</taxonomicName>
(
<figureCitation id="7AEF2A07FFE3FFFBFCA7FB8FFC83FBAD" box="[788,857,1053,1079]" captionStart="FIGURE 2" captionStartId="5.[151,250,1237,1262]" captionTargetBox="[174,1426,572,1198]" captionTargetId="figure@5.[151,1436,561,1212]" captionTargetPageId="5" captionText="FIGURE 2. Bayesian trees showing the relationship of E. plasticus sp. nov. (bold blue) within the Eurythenes genus based on: A. 16S rDNA sequence data, and B. COI sequence data. References for comparative sequences are in Table 2. Bayesian posterior probabilities and maximum likelihood bootstrap support are on branch nodes. Values less than 0.50 or 50 are not stated or depicted by asterisk. Species groups determined by bPTP analysis are shown on right side of each phylogeny." figureDoi="http://doi.org/10.5281/zenodo.3697671" httpUri="https://zenodo.org/record/3697671/files/figure.png" pageId="13" pageNumber="176">Fig. 2</figureCitation>
). The bPTP analysis of COI and both K2P analyses delineated 
<taxonomicName id="25D44D01FFE3FFFBFEA2FBD0FE4EFBC1" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[273,404,1089,1115]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFEA2FBD0FEF8FBC1" box="[273,290,1090,1115]" italics="true" pageId="13" pageNumber="176">E</emphasis>
. 
<emphasis id="D0A0EA90FFE3FFFBFE83FBD3FE4EFBC1" box="[304,404,1089,1115]" italics="true" pageId="13" pageNumber="176">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFE28FBD3FE2BFBC1" box="[411,497,1089,1115]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
to be a distinctive lineage, and these methods aligned with previous studies that detected cryptic speciation within the 
<taxonomicName id="25D44D01FFE3FFFBFD90FBF7FDABFBE5" baseAuthorityName="Lichtenstein in Mandt" baseAuthorityYear="1822" box="[547,625,1125,1151]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gryllus">
<emphasis id="D0A0EA90FFE3FFFBFD90FBF7FDABFBE5" box="[547,625,1125,1151]" italics="true" pageId="13" pageNumber="176">gryllus</emphasis>
</taxonomicName>
-complex (
<bibRefCitation id="86454B73FFE3FFFBFD5BFBF7FC33FBE5" author="Havermans, C. &amp; Sonet, G. &amp; d'Udekem d'Acoz, C. &amp; Nagy, Z. T. &amp; Martin, P. &amp; Brix, S. &amp; Riehl, T. &amp; Agrawal, S. &amp; Held, C." box="[744,1001,1125,1151]" pageId="13" pageNumber="176" pagination="74218" refId="ref10077" refString="Havermans, C., Sonet, G., d'Udekem d'Acoz, C., Nagy, Z. T., Martin, P., Brix, S., Riehl, T., Agrawal, S. &amp; Held, C. (2013) Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and bipolar species. Public Library of Science One, 8 (9), e 74218. https: // doi. org / 10.1371 / journal. pone. 0074218" type="journal article" year="2013">
Havermans 
<emphasis id="D0A0EA90FFE3FFFBFCC3FBF4FC72FBE5" box="[880,936,1125,1151]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2013
</bibRefCitation>
; 
<bibRefCitation id="86454B73FFE3FFFBFC47FBF7FB11FBE5" author="Eustace, R. M. &amp; Kilgallen, N. M. &amp; Ritchie, H. &amp; Piertney, S. B. &amp; Jamieson, A. J." box="[1012,1227,1125,1151]" pageId="13" pageNumber="176" pagination="91 - 98" refId="ref9369" refString="Eustace, R. M., Kilgallen, N. M., Ritchie, H., Piertney, S. B. &amp; Jamieson, A. J. (2016) Morphological and ontogenetic stratification of abyssal and hadal Eurythenes gryllus sensu lato (Amphipoda: Lysianassidae) from the Peru-Chile Trench. Deep Sea Research I: Oceanographic Research Papers, 109, 91 - 98. https: // doi. org / 10.1016 / j. dsr. 2015.11.005" type="journal article" year="2016">
Eustace 
<emphasis id="D0A0EA90FFE3FFFBFBE2FBF4FB53FBE5" box="[1105,1161,1125,1151]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2016
</bibRefCitation>
; Narahara-Nakano 
<emphasis id="D0A0EA90FFE3FFFBFF24FB18FF0BFB39" box="[151,209,1161,1187]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2017). The 16S phylogeny specifically showed 
<taxonomicName id="25D44D01FFE3FFFBFD4AFB18FCA4FB39" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[761,894,1161,1187]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFD4AFB18FCD0FB39" box="[761,778,1162,1187]" italics="true" pageId="13" pageNumber="176">E</emphasis>
. 
<emphasis id="D0A0EA90FFE3FFFBFCA9FB1BFCA4FB39" box="[794,894,1161,1187]" italics="true" pageId="13" pageNumber="176">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFC35FB1BFC04FB39" box="[902,990,1161,1187]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
to be nearly identical to Eg7 (
<figureCitation id="7AEF2A07FFE3FFFBFA8FFB1BFA42FB39" box="[1340,1432,1161,1187]" captionStart="FIGURE 2" captionStartId="5.[151,250,1237,1262]" captionTargetBox="[174,1426,572,1198]" captionTargetId="figure@5.[151,1436,561,1212]" captionTargetPageId="5" captionText="FIGURE 2. Bayesian trees showing the relationship of E. plasticus sp. nov. (bold blue) within the Eurythenes genus based on: A. 16S rDNA sequence data, and B. COI sequence data. References for comparative sequences are in Table 2. Bayesian posterior probabilities and maximum likelihood bootstrap support are on branch nodes. Values less than 0.50 or 50 are not stated or depicted by asterisk. Species groups determined by bPTP analysis are shown on right side of each phylogeny." figureDoi="http://doi.org/10.5281/zenodo.3697671" httpUri="https://zenodo.org/record/3697671/files/figure.png" pageId="13" pageNumber="176">Fig. 2A</figureCitation>
; 
<bibRefCitation id="86454B73FFE3FFFBFF24FB3FFE43FB5D" author="France, S. C. &amp; Kocher, T. D." box="[151,409,1197,1223]" pageId="13" pageNumber="176" pagination="633 - 643" refId="ref9665" refString="France, S. C. &amp; Kocher, T. D. (1996) Geographic and bathymetric patterns of mitochondrial 16 S rRNA sequence divergence amount deep-sea amphipods, Eurythenes gryllus. Marine Biology, 126 (4), 633 - 643." type="journal article" year="1996">
<collectingCountry id="9AC37612FFE3FFFBFF24FB3FFF39FB5D" box="[151,227,1197,1223]" name="France" pageId="13" pageNumber="176">France</collectingCountry>
&amp; Kocher 1996
</bibRefCitation>
; 
<bibRefCitation id="86454B73FFE3FFFBFE17FB3FFD7EFB5D" author="Havermans, C. &amp; Sonet, G. &amp; d'Udekem d'Acoz, C. &amp; Nagy, Z. T. &amp; Martin, P. &amp; Brix, S. &amp; Riehl, T. &amp; Agrawal, S. &amp; Held, C." box="[420,676,1197,1223]" pageId="13" pageNumber="176" pagination="74218" refId="ref10077" refString="Havermans, C., Sonet, G., d'Udekem d'Acoz, C., Nagy, Z. T., Martin, P., Brix, S., Riehl, T., Agrawal, S. &amp; Held, C. (2013) Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and bipolar species. Public Library of Science One, 8 (9), e 74218. https: // doi. org / 10.1371 / journal. pone. 0074218" type="journal article" year="2013">
Havermans 
<emphasis id="D0A0EA90FFE3FFFBFD99FB3CFD80FB5D" box="[554,602,1197,1223]" italics="true" pageId="13" pageNumber="176">et al</emphasis>
. 2013
</bibRefCitation>
). This 
<taxonomicName id="25D44D01FFE3FFFBFD5DFB3FFCB6FB5D" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[750,876,1197,1223]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFD5DFB3FFCB6FB5D" box="[750,876,1197,1223]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
sp. was a singleton recovered from abyssal depths at the Horizon Guyot seamount, Pacific Ocean, and it was collected along with another 
<taxonomicName id="25D44D01FFE3FFFBFB39FB43FAD2FB71" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[1162,1288,1233,1259]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFB39FB43FAD2FB71" box="[1162,1288,1233,1259]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
sp. from the divergent Eg9 clade (
<bibRefCitation id="86454B73FFE3FFFBFE30FB67FD5FFA95" author="Havermans, C. &amp; Sonet, G. &amp; d'Udekem d'Acoz, C. &amp; Nagy, Z. T. &amp; Martin, P. &amp; Brix, S. &amp; Riehl, T. &amp; Agrawal, S. &amp; Held, C." box="[387,645,1269,1295]" pageId="13" pageNumber="176" pagination="74218" refId="ref10077" refString="Havermans, C., Sonet, G., d'Udekem d'Acoz, C., Nagy, Z. T., Martin, P., Brix, S., Riehl, T., Agrawal, S. &amp; Held, C. (2013) Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and bipolar species. Public Library of Science One, 8 (9), e 74218. https: // doi. org / 10.1371 / journal. pone. 0074218" type="journal article" year="2013">
Havermans 
<emphasis id="D0A0EA90FFE3FFFBFDB9FB64FDE1FA95" box="[522,571,1269,1295]" italics="true" pageId="13" pageNumber="176">et al</emphasis>
. 2013
</bibRefCitation>
). Confidence in the identification of Eg7 would be further strengthened with additional genetic or morphological data.
</paragraph>
<paragraph id="E26B3682FFE3FFFBFF74FAAFFE14F9B5" blockId="13.[151,1437,153,2015]" pageId="13" pageNumber="176">
The morphological variation seen in 
<taxonomicName id="25D44D01FFE3FFFBFDD0FAACFD3CFACD" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[611,742,1341,1367]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFDD0FAACFD3CFACD" box="[611,742,1341,1367]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFD5EFAAFFC9CFACD" box="[749,838,1341,1367]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
, such as an uneven coxa 5 lobe and lack of a tooth on the posteroventral corner of epimeron 3, supported the phylogenetic evidence as an undescribed lineage. Consistent with previous studies, these morphological characteristics should be used with caution, as some are difficult to discern objectively. Additional specimens, like from the Eg7 clade, may reveal phenotypic plasticity in the characteristics observed in this morphological study (
<bibRefCitation id="86454B73FFE3FFFBFD1DFA5FFBB4FA7D" author="d'Udekem d'Acoz, C. &amp; Havermans, C." box="[686,1134,1484,1511]" pageId="13" pageNumber="176" pagination="1 - 80" refId="ref9131" refString="d'Udekem d'Acoz, C. &amp; Havermans, C. (2015) Contribution to the systematics of the genus Eurythenes S. I. Smith in Scudder, 1882 (Crustacea: Amphipoda: Lysianassoidea: Eurytheneidae). Zootaxa, 3971 (1), 1 - 80. https: // doi. org / 10.11646 / zootaxa. 3971.1.1" type="journal article" year="2015">d’Udekem d’Acoz &amp; Havermans 2015</bibRefCitation>
). Continued application of a combined molecular and morphological approaches in future studies is likely to reveal further species diversity within the 
<taxonomicName id="25D44D01FFE3FFFBFEBCF987FE87F9B5" baseAuthorityName="Lichtenstein in Mandt" baseAuthorityYear="1822" box="[271,349,1557,1583]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gryllus">
<emphasis id="D0A0EA90FFE3FFFBFEBCF987FE87F9B5" box="[271,349,1557,1583]" italics="true" pageId="13" pageNumber="176">gryllus</emphasis>
</taxonomicName>
-complex.
</paragraph>
<paragraph id="E26B3682FFE3FFFBFF74F9ABFA55F845" blockId="13.[151,1437,153,2015]" pageId="13" pageNumber="176">
The discovery of 
<taxonomicName id="25D44D01FFE3FFFBFE23F9A8FDCFF9C9" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[400,533,1593,1619]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFE23F9A8FDCFF9C9" box="[400,533,1593,1619]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFDAEF9ABFDAFF9C9" box="[541,629,1593,1619]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
continues to align with the pattern 
<taxonomicName id="25D44D01FFE3FFFBFBB8F9ABFB53F9C9" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[1035,1161,1593,1619]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFBB8F9ABFB53F9C9" box="[1035,1161,1593,1619]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
that the geographic and bathymetric species distributions are complex (
<bibRefCitation id="86454B73FFE3FFFBFD1AF9CFFCB4F9E2" author="Havermans, C." box="[681,878,1629,1656]" pageId="13" pageNumber="176" pagination="12 - 25" refId="ref10174" refString="Havermans, C. (2016) Have we so far only seen the tip of the iceberg? Exploring species diversity and distribution of the giant amphipod Eurythenes. Biodiversity, 17 (1 - 2), 12 - 25. https: // doi. org / 10.1080 / 14888386.2016.1172257" type="journal article" year="2016">Havermans 2016</bibRefCitation>
). With the Eg7 singleton, the geographic range of 
<taxonomicName id="25D44D01FFE3FFFBFF24F910FEC0F901" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[151,282,1665,1691]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFF24F910FEC0F901" box="[151,282,1665,1691]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFE92F913FEA2F901" box="[289,376,1665,1691]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
thus far appears to be restricted to the Central Pacific Ocean. Across that ocean basin, 
<taxonomicName id="25D44D01FFE3FFFBFAF6F910FF16F925" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFAF6F910FF16F925" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFF67F937FEF1F925" box="[212,299,1701,1727]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
has broad bathymetric range, ~ 
<quantity id="252C9B67FFE3FFFBFD3EF937FD3DF925" box="[653,743,1701,1727]" metricMagnitude="3" metricUnit="m" metricValue="3.0" pageId="13" pageNumber="176" unit="m" value="3000.0">3000 m</quantity>
. While it is common among 
<taxonomicName id="25D44D01FFE3FFFBFB9FF937FB70F925" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[1068,1194,1701,1727]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE3FFFBFB9FF937FB70F925" box="[1068,1194,1701,1727]" italics="true" pageId="13" pageNumber="176">Eurythenes</emphasis>
</taxonomicName>
to be found only in a single ocean basin and have a wide vertical distribution (
<bibRefCitation id="86454B73FFE3FFFBFCB9F95BFC38F979" author="Eustace, R. M. &amp; Kilgallen, N. M. &amp; Ritchie, H. &amp; Piertney, S. B. &amp; Jamieson, A. J." box="[778,994,1737,1763]" pageId="13" pageNumber="176" pagination="91 - 98" refId="ref9369" refString="Eustace, R. M., Kilgallen, N. M., Ritchie, H., Piertney, S. B. &amp; Jamieson, A. J. (2016) Morphological and ontogenetic stratification of abyssal and hadal Eurythenes gryllus sensu lato (Amphipoda: Lysianassidae) from the Peru-Chile Trench. Deep Sea Research I: Oceanographic Research Papers, 109, 91 - 98. https: // doi. org / 10.1016 / j. dsr. 2015.11.005" type="journal article" year="2016">
Eustace 
<emphasis id="D0A0EA90FFE3FFFBFCDAF958FC7AF979" box="[873,928,1737,1763]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2016
</bibRefCitation>
; 
<bibRefCitation id="86454B73FFE3FFFBFC5FF95BFB77F97E" author="Havermans, C." box="[1004,1197,1737,1764]" pageId="13" pageNumber="176" pagination="12 - 25" refId="ref10174" refString="Havermans, C. (2016) Have we so far only seen the tip of the iceberg? Exploring species diversity and distribution of the giant amphipod Eurythenes. Biodiversity, 17 (1 - 2), 12 - 25. https: // doi. org / 10.1080 / 14888386.2016.1172257" type="journal article" year="2016">Havermans 2016</bibRefCitation>
), it is less common to span across the abyssal and hadal zones. Although, this is not unique, as it has been documented in other amphipods, such as 
<taxonomicName id="25D44D01FFE3FFFBFF5EF883FDB1F8B1" authority="(Jamieson et al. 2013)" baseAuthorityName="Jamieson" baseAuthorityYear="2013" box="[237,619,1809,1835]" class="Malacostraca" family="Lysianassidae" genus="Alicella" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="gigantea">
<emphasis id="D0A0EA90FFE3FFFBFF5EF883FEB7F8B1" box="[237,365,1809,1835]" italics="true" pageId="13" pageNumber="176">A. gigantea</emphasis>
(
<bibRefCitation id="86454B73FFE3FFFBFEC9F883FDB9F8B1" author="Jamieson, A. J. &amp; Lacey, N. C. &amp; Lorz, A. N. &amp; Rowden, A. A. &amp; Piertney S. B." box="[378,611,1809,1835]" pageId="13" pageNumber="176" pagination="107 - 113" refId="ref10631" refString="Jamieson, A. J., Lacey, N. C., Lorz, A. N., Rowden, A. A. &amp; Piertney S. B. (2013) The supergiant amphipod Alicella gigantea (Crustacea: Alicellidae) from hadal depths in the Kermadec Trench, SW Pacific Ocean. Deep Sea Research II: Topical Studies in Oceanography, 92, 107 - 113. https: // doi. org / 10.1016 / j. dsr 2.2012.12.002" type="journal article" year="2013">
Jamieson 
<emphasis id="D0A0EA90FFE3FFFBFE59F880FDFBF8B1" box="[490,545,1809,1835]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2013
</bibRefCitation>
)
</taxonomicName>
. A species needs to be able to cope at the cellular, reproductive, and physiological levels in both the stable abyssal (
<bibRefCitation id="86454B73FFE3FFFBFDD8F8A7FCEAF8D5" author="Smith, C. R. &amp; De Leo, F. C. &amp; Bernardino, A. F. &amp; Sweetman, A. K. &amp; Arbizu, P. M." box="[619,816,1845,1871]" pageId="13" pageNumber="176" pagination="518 - 528" refId="ref12131" refString="Smith, C. R., De Leo, F. C., Bernardino, A. F., Sweetman, A. K. &amp; Arbizu, P. M. (2008) Abyssal food limitation, ecosystem structure and climate change. Trends in Ecology &amp; Evolution, 23 (9), 518 - 528. https: // doi. org / 10.1016 / j. tree. 2008.05.002" type="journal article" year="2008">
Smith 
<emphasis id="D0A0EA90FFE3FFFBFD04F8A4FD35F8D5" box="[695,751,1845,1871]" italics="true" pageId="13" pageNumber="176">et al.</emphasis>
2008
</bibRefCitation>
) and the dynamic hadal environments (
<bibRefCitation id="86454B73FFE3FFFBFB58F8A7FA4DF8D5" author="Jamieson, A. J." box="[1259,1431,1844,1871]" pageId="13" pageNumber="176" refId="ref10600" refString="Jamieson, A. J. (2015) The hadal zone: Life in the deepest oceans, 1 st ed. Cambridge University Press, Cambridge, UK." type="book" year="2015">Jamieson 2015</bibRefCitation>
; 
<bibRefCitation id="86454B73FFE3FFFBFF24F8CBFE5AF8E9" author="Downing, A. B. &amp; Wallace, G. T. &amp; Yancey, P. H." box="[151,384,1881,1907]" pageId="13" pageNumber="176" pagination="1 - 10" refId="ref9053" refString="Downing, A. B., Wallace, G. T. &amp; Yancey, P. H. (2018) Organic osmolytes of amphipods from littoral to hadal zones: Increases with depth in trimethylamine N-oxide, scyllo - inositol and other potential pressure counteractants. DeepSea Research Part I: Oceanographic Research Papers, 138, 1 - 10. https: // doi. org / 10.1016 / j. dsr. 2018.05.008" type="journal article" year="2018">
Downing 
<emphasis id="D0A0EA90FFE3FFFBFEB5F8C8FEECF8E9" box="[262,310,1881,1907]" italics="true" pageId="13" pageNumber="176">et al</emphasis>
. 2018
</bibRefCitation>
). Yet, it was curious that during the present study, 
<taxonomicName id="25D44D01FFE3FFFBFC1FF8C8FBF5F8E9" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[940,1071,1881,1907]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFC1FF8C8FC67F8E9" box="[940,957,1882,1907]" italics="true" pageId="13" pageNumber="176">E</emphasis>
. 
<emphasis id="D0A0EA90FFE3FFFBFC78F8CBFBF5F8E9" box="[971,1071,1881,1907]" italics="true" pageId="13" pageNumber="176">plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFB86F8CBFB51F8E9" box="[1077,1163,1881,1907]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
was only collected from upper hadal depths, despite amphipods being captured at shallower and deeper depths (43 additional deployments 
<quantity id="252C9B67FFE3FFFBFF24F832FE84F821" box="[151,350,1952,1979]" metricMagnitude="3" metricUnit="m" metricValue="7.525499999999999" metricValueMax="10.545" metricValueMin="4.506" pageId="13" pageNumber="176" unit="m" value="7525.5" valueMax="10545.0" valueMin="4506.0">4506 to 10545 m</quantity>
; data unpublished). This highlights that the distribution of 
<taxonomicName id="25D44D01FFE3FFFBFBB3F830FB5FF821" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[1024,1157,1953,1979]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="13" pageNumber="176" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE3FFFBFBB3F830FB5FF821" box="[1024,1157,1953,1979]" italics="true" pageId="13" pageNumber="176">E. plasticus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="CB9357EBFFE3FFFBFB3DF833FB3CF821" box="[1166,1254,1953,1979]" pageId="13" pageNumber="176" rank="species">sp. nov.</taxonomicNameLabel>
is a patchwork. Further work and sampling will be required to understand the conditions that support the presence of this species.
</paragraph>
<paragraph id="E26B3682FFE0FFF8FF74FF0BFAFCFE6D" blockId="14.[151,1437,153,755]" pageId="14" pageNumber="177">
The finding of a microplastic fibre in the hindgut of a juvenile was not unexpected. Deep-sea scavenging amphipods, as an adaption to their food limited environment, indiscriminately consume carrion (
<bibRefCitation id="86454B73FFE0FFF8FB19FF2FFF0BFF61" author="Blankenship, L. E. &amp; Levin, L. A." pageId="14" pageNumber="177" pagination="1685 - 1697" refId="ref8593" refString="Blankenship, L. E. &amp; Levin, L. A. (2007) Extreme food webs: Foraging strategies and diets of scavenging amphipods from the ocean's deepest 5 kilometers. Limnology and Oceanography, 52 (4), 1685 - 1697." type="journal article" year="2007">Blankenship &amp; Levin 2007</bibRefCitation>
) and are known to inadvertently ingest microfibres present in the carrion and sediment (
<bibRefCitation id="86454B73FFE0FFF8FB16FF73FA4BFF61" author="Jamieson, A. J. &amp; Brooks, L. S. R. &amp; Reid, W. D. K. &amp; Piertney, S. B. &amp; Narayanaswamy, B. E. &amp; Linley, T. D." box="[1189,1425,225,251]" pageId="14" pageNumber="177" pagination="180667" refId="ref10718" refString="Jamieson, A. J., Brooks, L. S. R., Reid, W. D. K., Piertney, S. B., Narayanaswamy, B. E., &amp; Linley, T. D. (2019) Microplastics and synthetic particles ingested by deep-sea amphipods in six of the deepest marine ecosystems on Earth. Royal Society Open Science, 6 (2), 180667. http: // dx. doi. org / 10.1098 / rsos. 180667" type="journal article" year="2019">
Jamieson 
<emphasis id="D0A0EA90FFE0FFF8FAA5FF70FA94FF61" box="[1302,1358,225,251]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2019
</bibRefCitation>
). The detection of a microplastic adds to the number of hadal scavenging amphipods, including adult specimens of 
<taxonomicName id="25D44D01FFE0FFF8FF24FEB8FF2DFED9" baseAuthorityName="Birstein &amp; Vinogradov" baseAuthorityYear="1955" box="[151,247,298,323]" class="Malacostraca" family="Uristidae" genus="Hirondellea" kingdom="Animalia" order="Amphipoda" pageId="14" pageNumber="177" phylum="Arthropoda" rank="species" species="gigas">
<emphasis id="D0A0EA90FFE0FFF8FF24FEB8FF2DFED9" box="[151,247,298,323]" italics="true" pageId="14" pageNumber="177">H. gigas</emphasis>
</taxonomicName>
from the Mariana Trench and 
<taxonomicName id="25D44D01FFE0FFF8FDFCFEBBFD17FED9" authorityName="S. I. Smith in Scudder" authorityYear="1882" box="[591,717,297,323]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="14" pageNumber="177" phylum="Arthropoda" rank="genus">
<emphasis id="D0A0EA90FFE0FFF8FDFCFEBBFD17FED9" box="[591,717,297,323]" italics="true" pageId="14" pageNumber="177">Eurythenes</emphasis>
</taxonomicName>
sp. ‘hadal’ the Peru-Chile Trench (
<bibRefCitation id="86454B73FFE0FFF8FBE4FEBBFA9EFED9" author="Jamieson, A. J. &amp; Brooks, L. S. R. &amp; Reid, W. D. K. &amp; Piertney, S. B. &amp; Narayanaswamy, B. E. &amp; Linley, T. D." box="[1111,1348,297,323]" pageId="14" pageNumber="177" pagination="180667" refId="ref10718" refString="Jamieson, A. J., Brooks, L. S. R., Reid, W. D. K., Piertney, S. B., Narayanaswamy, B. E., &amp; Linley, T. D. (2019) Microplastics and synthetic particles ingested by deep-sea amphipods in six of the deepest marine ecosystems on Earth. Royal Society Open Science, 6 (2), 180667. http: // dx. doi. org / 10.1098 / rsos. 180667" type="journal article" year="2019">
Jamieson 
<emphasis id="D0A0EA90FFE0FFF8FB7BFEB8FADBFED9" box="[1224,1281,297,323]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2019
</bibRefCitation>
), which have been found to have consumed plastic microfibers. Microplastic consumption by a juvenile indicates that scavenging amphipods are potentially ingesting microplastics throughout their life, which could pose acute and chronic health effects. While the ecotoxicological impacts of microplastic exposure has yet to be investigated on deep-sea amphipods, early work on other Malacostraca indicates that the ingestion of polypropylene fibres by the sand crab, 
<taxonomicName id="25D44D01FFE0FFF8FF24FE4CFE8EFE6D" baseAuthorityName="Stimpson" baseAuthorityYear="1857" box="[151,340,477,503]" class="Malacostraca" family="Hippidae" genus="Emerita" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="177" phylum="Arthropoda" rank="species" species="analoga">
<emphasis id="D0A0EA90FFE0FFF8FF24FE4CFE8EFE6D" box="[151,340,477,503]" italics="true" pageId="14" pageNumber="177">Emerita analoga</emphasis>
</taxonomicName>
, increases adult mortality and decreases in retention of egg clutches (
<bibRefCitation id="86454B73FFE0FFF8FBEDFE4FFAC0FE6D" author="Horn, D. &amp; Granek, E. F. &amp; Steele, C. L." box="[1118,1306,477,503]" pageId="14" pageNumber="177" refId="ref10356" refString="Horn, D., Granek, E. F. &amp; Steele, C. L. (2019) Effects of environmentally relevant concentrations of microplastic fibers on Pacific mole crab (Emerita analoga) mortality and reproduction. Limnology and Oceanography Letters. https: // doi. org / 10.1002 / lol 2.10137" type="book" year="2019">Horn et al. 2019</bibRefCitation>
).
</paragraph>
<paragraph id="E26B3682FFE0FFF8FF74FD93FEB2FD69" blockId="14.[151,1437,153,755]" pageId="14" pageNumber="177">
This study adds to the growing body of literature on marine organisms ingesting plastic and microfibers (
<bibRefCitation id="86454B73FFE0FFF8FAD4FD93FE87FDA5" author="Besseling, E. &amp; Foekema, E. M. &amp; Van Franeker, J. A. &amp; Leopold, M. F. &amp; Kuhn, S. &amp; Bravo Rebolledo, E. L. &amp; Hesse, E. &amp; Mielke, L. J. I. J. &amp; Ijzer, J. &amp; Kamminga, P. &amp; Koelmans, A. A." pageId="14" pageNumber="177" pagination="248 - 252" refId="ref8417" refString="Besseling, E., Foekema, E. M., Van Franeker, J. A., Leopold, M. F., Kuhn, S., Bravo Rebolledo, E. L., Hesse, E., Mielke, L. J. I. J., Ijzer, J., Kamminga, P. &amp; Koelmans, A. A. (2015) Microplastic in a macro filter feeder: Humpback whale Megaptera no- vaeangliae. Marine Pollution Bulletin, 95 (1), 248 - 252. https: // doi. org / 10.1016 / j. marpolbul. 2015.04.007" type="journal article" year="2015">
Besseling 
<emphasis id="D0A0EA90FFE0FFF8FF51FDB4FEC1FDA5" box="[226,283,549,575]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2015
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; Lusher 
<emphasis id="D0A0EA90FFE0FFF8FE0CFDB4FE22FDA5" box="[447,504,549,575]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2015; 
<bibRefCitation id="86454B73FFE0FFF8FDF4FDB7FCC8FDA5" author="Bellas, J. &amp; Martinez-Armental, J. &amp; Martinez-Camara, A. &amp; Besada, V. &amp; Martinez-Gomez, C." box="[583,786,549,575]" pageId="14" pageNumber="177" pagination="55 - 60" refId="ref8349" refString="Bellas, J., Martinez-Armental, J., Martinez-Camara, A., Besada, V. &amp; Martinez-Gomez, C. (2016) Ingestion of microplastics by demersal fish from the Spanish Atlantic and Mediterranean coasts. Marine Pollution Bulletin, 109 (1), 55 - 60. https: // doi. org / 10.1016 / j. marpolbul. 2016.06.026" type="journal article" year="2016">
Bellas 
<emphasis id="D0A0EA90FFE0FFF8FD26FDB4FD14FDA5" box="[661,718,549,575]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2016
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; 
<bibRefCitation id="86454B73FFE0FFF8FCA8FDB7FBE1FDA5" author="Alomar, C. &amp; Deudero, S." box="[795,1083,549,575]" pageId="14" pageNumber="177" pagination="223 - 229" refId="ref8226" refString="Alomar, C. &amp; Deudero, S. (2017) Evidence of microplastic ingestion in the shark Galeus melastomus Rafinesque, 1810 in the continental shelf off the western Mediterranean Sea. Environmental Pollution, 223, 223 - 229. https: // doi. org / 10.1016 / j. envpol. 2017.01.015" type="journal article" year="2017">Alomar &amp; Deudero 2017</bibRefCitation>
). The microplastic found in the hindgut of 
<taxonomicName id="25D44D01FFE0FFF8FEA3FDD8FE48FDF9" authority="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson, 2020" authorityName="Weston &amp; Carrillo-Barragan &amp; Linley &amp; Reid &amp; Jamieson" authorityYear="2020" box="[272,402,585,611]" class="Malacostraca" family="Lysianassidae" genus="Eurythenes" kingdom="Animalia" order="Amphipoda" pageId="14" pageNumber="177" phylum="Arthropoda" rank="species" species="plasticus" status="sp. nov.">
<emphasis id="D0A0EA90FFE0FFF8FEA3FDD8FE48FDF9" box="[272,402,585,611]" italics="true" pageId="14" pageNumber="177">E. plasticus</emphasis>
</taxonomicName>
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was most similar to PET, which is one of the top five most prevalent synthetic plastic polymers produced and discarded globally (
<bibRefCitation id="86454B73FFE0FFF8FD30FDFFFC97FD1D" author="Geyer, R. &amp; Jambeck, J. R. &amp; Lavender Law, K." box="[643,845,621,647]" pageId="14" pageNumber="177" pagination="1700782" refId="ref9916" refString="Geyer, R., Jambeck, J. R. &amp; Lavender Law, K. (2017) Production, use, and fate of all plastic ever made. Science Advances, 3 (7), e 1700782. https: // doi. org / 10.1126 / sciadv. 1700782" type="journal article" year="2017">
Geyer 
<emphasis id="D0A0EA90FFE0FFF8FD63FDFCFCD3FD1D" box="[720,777,621,647]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2017
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). Without substantial global changes to the life cycle of plastic, from reducing the rate of plastic production to improving waste management (
<bibRefCitation id="86454B73FFE0FFF8FBD4FD03FAECFD31" author="Forrest, A. &amp; Giacovazzi, L. &amp; Dunlop, S. &amp; Reisser, J. &amp; Tickler, D. &amp; Jamieson, A. J. &amp; Meeuwig, J. J." box="[1127,1334,657,683]" pageId="14" pageNumber="177" pagination="627" refId="ref9586" refString="Forrest, A., Giacovazzi, L., Dunlop, S., Reisser, J., Tickler, D., Jamieson, A. J. &amp; Meeuwig, J. J. (2019) Eliminating plastic pollution: How a voluntary contribution from industry will drive the circular plastics economy. Frontiers in Marine Science, 6: 627. https: // doi. org / 10.3389 / fmars. 2019.00627" type="journal article" year="2019">
Forrest 
<emphasis id="D0A0EA90FFE0FFF8FB0DFD00FB2FFD31" box="[1214,1269,657,683]" italics="true" pageId="14" pageNumber="177">et al.</emphasis>
2019
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), plastics and microfibres will continue to be transported to the deep sea and be ubiquitous in the hadal food chain for the foreseeable future.
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</subSubSection>
</treatment>
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