174 lines
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174 lines
16 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.841.32364" ID-GBIF-Dataset="ac2013d2-401a-4317-b2c0-e4efdaed4341" ID-PMC="PMC6491414" ID-Pensoft-Pub="1313-2970-841-1" ID-PubMed="31097912" ID-ZBK="4D023A1CB64C42788C8AF23D55266E2F" ModsDocAuthor="" ModsDocDate="2019" ModsDocID="1313-2970-841-1" ModsDocOrigin="ZooKeys 841" ModsDocTitle="Review of the fish parasitic genus Elthusa Schioedte & Meinert, 1884 (Crustacea, Isopoda, Cymothoidae) from South Africa, including the description of three new species" checkinTime="1556044701643" checkinUser="pensoft" docAuthor="van der Wal, Serita, Smit, Nico J. & Hadfield, Kerry A." docDate="2019" docId="825C59ED01F70DD76E77A965B5003FB7" docLanguage="en" docName="ZooKeys 841: 1-37" docOrigin="ZooKeys 841" docSource="http://dx.doi.org/10.3897/zookeys.841.32364" docTitle="Elthusa rotunda Wal, Smit & Hadfield, 2019, sp. n." docType="treatment" docUuid="138FBF0D-2E4B-4561-86C8-F209B78A33E0" docUuidSource="ZooBank" docVersion="5" lastPageNumber="1" masterDocId="FB3006256C0DFFA4FFE9FFDDD8202656" masterDocTitle="Review of the fish parasitic genus Elthusa Schioedte & Meinert, 1884 (Crustacea, Isopoda, Cymothoidae) from South Africa, including the description of three new species" masterLastPageNumber="37" masterPageNumber="1" pageNumber="1" updateTime="1668167181931" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Review of the fish parasitic genus Elthusa Schioedte & Meinert, 1884 (Crustacea, Isopoda, Cymothoidae) from South Africa, including the description of three new species</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>van der Wal, Serita</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Smit, Nico J.</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Hadfield, Kerry A.</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2019</mods:date>
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<mods:detail type="volume">
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<mods:number>841</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>37</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.841.32364</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.841.32364</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-841-1</mods:identifier>
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<mods:identifier type="ZBK">4D023A1CB64C42788C8AF23D55266E2F</mods:identifier>
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<mods:identifier type="ZooBank">4D023A1CB64C42788C8AF23D55266E2F</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="156828327" LSID="urn:lsid:zoobank.org:act:138FBF0D-2E4B-4561-86C8-F209B78A33E0" httpUri="http://treatment.plazi.org/id/825C59ED01F70DD76E77A965B5003FB7" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="http://zoobank.org/138FBF0D-2E4B-4561-86C8-F209B78A33E0" class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa rotunda" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="rotunda">Elthusa rotunda</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. n.</taxonomicNameLabel>
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Figures 12, 13, Table 1
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Material examined.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Holotype. SOUTH AFRICA • 1 ♀ (ovigerous, 29.0 mm TL; 20.0 mm W); Cape Town, Sea Point;
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<geoCoordinate direction="south" orientation="latitude" precision="925" value="-33.916668">33°55'S</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="925" value="18.383333">18°23'E</geoCoordinate>
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; January 1960; coll. G Branch; SAMC A11001.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">Description</paragraph>
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<paragraph pageId="0" pageNumber="1">(ovigerous ♀). Figs 12-13. Body round, not twisted, 1.4 times as long as greatest width; dorsal surfaces smooth and polished in appearance, widest at pereonite 4, most narrow at pereonite 1; pereonite lateral margins mostly posteriorly ovate, medially indented. Cephalon 0.4 times longer than wide, visible from dorsal view, sub-triangular with blunt anterior point. Frontal margin thickened, ventrally folded. Eyes oval with distinct margins; one eye 0.2 times width of cephalon; 0.5 times length of cephalon. Pereonite 1 smooth, anterior border evenly concave; anterolateral angles rounded, extending to the medial region of eyes. Posterior margins of pereonites smooth, slightly curved laterally, posterior margins of pereonites 2-3 uneven. Coxae 2-3 wide; with posteroventral angles rounded; coxae 4-7 with rounded point, not extending past pereonite posterior margin. Pereonites becoming more progressively rounded posteriorly; pereonite 5 most narrow. Pleon 0.4 times as long as total body length; pleonite 1 largely concealed by pereonite 7, slightly visible in dorsal view; pleonites posterior margin slightly concave, smooth, slightly curved laterally. Pleonite 2 lateral margins overlapped by pereonite 7. Pleonites 3-4 similar in form to pleonite 2; pleonite 5 longest, overlapped by lateral margins of pleonite 4, posterior margin medially convex. Pleotelson broadly rounded, 0.7 times as long as anterior width, dorsal surface smooth; lateral margins convex; posterior margin evenly rounded.</paragraph>
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<caption pageId="0" pageNumber="1">
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<paragraph pageId="0" pageNumber="1">
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Figure 12.
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<taxonomicName class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa rotunda" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="rotunda">Elthusa rotunda</taxonomicName>
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sp. n. holotype ♀ (ovigerous, 28 mm TL, 19 mm W) (SAMC-A11001) from Sea Point, South Africa A dorsal body B lateral body C oostegites D ventral cephalon E dorsal view of cephalon and pereonite 1 F uropod G pleopod 1 H dorsal view of pleon I pereopod 1 J pereopod 7.
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</paragraph>
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</caption>
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<caption pageId="0" pageNumber="1">
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<paragraph pageId="0" pageNumber="1">
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Figure 13. Photos of
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<taxonomicName class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa rotunda" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="rotunda">Elthusa rotunda</taxonomicName>
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sp. n. holotype ♀ (ovigerous, 28 mm TL, 19 mm W) (SAMC-A11001) from Sea Point, South Africa A dorsal view B ventral view C lateral view.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="1">Antennula shorter than antenna, consisting of eight articles; peduncle articles I and II distinct and articulated; extending to middle of eye. Antenna consists of ten articles, extending to past anterior margin of pereonite 1.</paragraph>
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<paragraph pageId="0" pageNumber="1">Pereopod 1 basis 1.7 times as long as greatest width; ischium 0.7 times as long as basis; merus proximal margin without bulbous protrusion; propodus 1.4 times as long as wide; dactylus slender, 1.3 times as long as propodus, 2.9 times as long as basal width. All pereopods without robust or simple setae. Pereopod 7 basis with carina, 2.1 times as long as greatest width; ischium with slight bulbous protrusion, 0.8 times as long as basis; merus proximal margin with bulbous protrusion, 0.6 times as long as wide, 0.3 times as long as ischium; carpus with bulbous protrusion, 0.7 times as long as wide, 0.3 times as long as ischium; propodus 1.2 times as long as wide, 0.9 times as long as ischium; dactylus slender, 1.7 times as long as propodus, 2.5 times as long as basal width.</paragraph>
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<paragraph pageId="0" pageNumber="1">Pleopods simple, exopod larger than endopod. Pleopod 1 exopod 1.3 times as long as wide, lateral margin weakly convex, distally broadly rounded, mesial margin weakly convex; peduncle 2.5 times as wide as long.</paragraph>
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<paragraph pageId="0" pageNumber="1">Uropod half the length of pleotelson, peduncle 0.9 times longer than rami, peduncle lateral margin without setae; rami not extending beyond pleotelson, marginal setae absent, apices broadly rounded. Endopod apically rounded, 2.6 times as long as greatest width, lateral margin weakly convex, mesial margin weakly convex. Exopod extending to end of endopod, 2.2 times as long as greatest width, apically rounded, lateral margin weakly convex, mesial margin straight.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">Size.</paragraph>
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<paragraph pageId="0" pageNumber="1">Ovigerous female (29.0 mm TL, 20.0 mm W).</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="etymology">
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<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="1">The epithet is a noun in the nominative singular. It is named after its most distinct, defining character, which is the rounded shape of the body. The Latin word for round is rotundus.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="distribution">
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<paragraph pageId="0" pageNumber="1">Distribution.</paragraph>
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<paragraph pageId="0" pageNumber="1">Currently only known from Sea Point, Cape Town, South Africa.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="host">
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<paragraph pageId="0" pageNumber="1">Hosts.</paragraph>
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<paragraph pageId="0" pageNumber="1">Not known.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="remarks">
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<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The diagnostic characters of
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. include its circular body shape; a sub-triangular cephalon with blunt anterior margin; pereopod 7 merus and carpus with protrusions on the proximal and lateral margins; pereonite 7 lateral margins that extend to pleonite 4; pleonite 5 longest and medially convex; a broadly rounded pleotelson posterior margin; and uropod rami that are sub-equal in length to the peduncle.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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When comparing
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. to the rest of the identified
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<taxonomicName class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">Elthusa</taxonomicName>
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species, its closest resemblance is to that of
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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. This is especially in regards to the shape of the uropods, pleon, and cephalon anterior margin. It can be distinguished from
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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in having a more rounded body shape compared to the ovoid body shape of
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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; triangular cephalon as opposed to the narrowly truncate cephalon of
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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; the broadly rounded pereonite 1 anterolateral margins of
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. compared to the narrowly rounded to pointed anterolateral margins of
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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pereonite 1; as well as the uropod rami and peduncles that are subequal in length, as opposed to the longer rami of
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<taxonomicName lsidName="E. raynaudii" pageId="0" pageNumber="1" rank="species" species="raynaudii">E. raynaudii</taxonomicName>
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(see Table 1).
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa rotunda" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="rotunda">Elthusa rotunda</taxonomicName>
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sp. n. can be distinguished from
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<taxonomicName lsidName="E. xena" pageId="0" pageNumber="1" rank="species" species="xena">E. xena</taxonomicName>
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sp. n. by the cephalon anterior margin which is more pointed in
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<taxonomicName lsidName="E. xena" pageId="0" pageNumber="1" rank="species" species="xena">E. xena</taxonomicName>
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sp. n. and more rounded in
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n.; broadly rounded uropod apices compared to the narrowly rounded ones from
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<taxonomicName lsidName="E. xena" pageId="0" pageNumber="1" rank="species" species="xena">E. xena</taxonomicName>
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sp. n.; the shape of the pleotelson, which is broadly rounded for
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. and roughly quadrate for
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<taxonomicName lsidName="E. xena" pageId="0" pageNumber="1" rank="species" species="xena">E. xena</taxonomicName>
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sp. n.; as well as the prominent presence of pereopod 7 protrusions on the merus and carpus of
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n., that are less bulbous on
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<taxonomicName lsidName="E. xena" pageId="0" pageNumber="1" rank="species" species="xena">E. xena</taxonomicName>
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sp. n.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The main differentiating characters between
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. and
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<taxonomicName lsidName="E. acutinasa" pageId="0" pageNumber="1" rank="species" species="acutinasa">E. acutinasa</taxonomicName>
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sp. n. include the shape of the cephalon anterior margin (bluntly rounded versus produced point); and the uropod morphology, with
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. having broadly rounded, longer uropodal rami in comparison to the short, pointed uropodal rami of
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<taxonomicName lsidName="E. acutinasa" pageId="0" pageNumber="1" rank="species" species="acutinasa">E. acutinasa</taxonomicName>
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sp. n.
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<taxonomicName class="Malacostraca" family="Cymothoidae" genus="Elthusa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Elthusa rotunda" order="Isopoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="rotunda">Elthusa rotunda</taxonomicName>
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sp. n. pleonite 5 is the longest, whereas
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<taxonomicName lsidName="E. acutinasa" pageId="0" pageNumber="1" rank="species" species="acutinasa">E. acutinasa</taxonomicName>
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sp. n. pleonite 1 is the longest; the presence of pereopod 7 protrusions on
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<taxonomicName lsidName="E. rotunda" pageId="0" pageNumber="1" rank="species" species="rotunda">E. rotunda</taxonomicName>
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sp. n. is more prominent and bulbous that those of
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<taxonomicName lsidName="E. acutinasa" pageId="0" pageNumber="1" rank="species" species="acutinasa">E. acutinasa</taxonomicName>
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sp. n. pereopod 7 (see Table 1).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |