177 lines
22 KiB
XML
177 lines
22 KiB
XML
<document id="F2D5F5E2755C685F5FD700FB5A0B749A" ID-CLB-Dataset="33260" ID-DOI="http://dx.doi.org/10.3897/zookeys.667.11414" ID-GBIF-Dataset="347a1d38-1c80-467f-9908-a9fd6d9b4769" ID-PMC="PMC5523384" ID-Pensoft-Pub="1313-2970-667-21" ID-PubMed="28769633" ID-ZooBank="75BDF5D9BDAC46F28F6134C01E1821B8" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-667-21" ModsDocOrigin="ZooKeys 667" ModsDocTitle="Revision of the fish parasitic genus Pleopodias Richardson, 1910 (Isopoda, Cymothoidae), with the description of a new species and key to the genus" checkinTime="1491908594745" checkinUser="pensoft" docAuthor="Hadfield, Kerry A. & Smit, Nico J." docDate="2017" docId="5DEA7D7F163778466684FC7A9AF7A761" docLanguage="en" docName="ZooKeys 667: 21-37" docOrigin="ZooKeys 667" docSource="http://dx.doi.org/10.3897/zookeys.667.11414" docTitle="Pleopodias diaphus Avdeev 1975" docType="treatment" docVersion="6" lastPageNumber="24" masterDocId="A31FA736D745FFE4FFE7A946FF88FFC6" masterDocTitle="Revision of the fish parasitic genus Pleopodias Richardson, 1910 (Isopoda, Cymothoidae), with the description of a new species and key to the genus" masterLastPageNumber="37" masterPageNumber="21" pageNumber="22" updateTime="1701375165890" updateUser="ExternalLinkService">
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<mods:title id="EEA6A6BB3E30646428F003E4865A2E04">Revision of the fish parasitic genus Pleopodias Richardson, 1910 (Isopoda, Cymothoidae), with the description of a new species and key to the genus</mods:title>
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<mods:namePart id="FD02AD89CAA08FC968B048D6DF82D3A9">Hadfield, Kerry A.</mods:namePart>
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<mods:namePart id="1EB7102C65587912511F8422014137EA">Smit, Nico J.</mods:namePart>
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<mods:typeOfResource id="C780E18778CF63B7AE7098A22A342CED">text</mods:typeOfResource>
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<mods:date id="29E12ABECFE62F339C2EAEC371FB6E6F">2017</mods:date>
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<mods:number id="A93793BDD73DC3F51AB9195926DE222E">667</mods:number>
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<mods:classification id="73F51D505C9AEC3E8E65485728003106">journal article</mods:classification>
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<mods:identifier id="AD3246E73D918CC6A60610B2BE87B628" type="DOI">http://dx.doi.org/10.3897/zookeys.667.11414</mods:identifier>
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<treatment id="5DEA7D7F163778466684FC7A9AF7A761" ID-GBIF-Taxon="128344903" LSID="urn:lsid:plazi:treatment:5DEA7D7F163778466684FC7A9AF7A761" httpUri="http://treatment.plazi.org/id/5DEA7D7F163778466684FC7A9AF7A761" lastPageId="3" lastPageNumber="24" pageId="1" pageNumber="22">
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<subSubSection id="E12C03893C25F6413BF35AF53771B2FD" pageId="1" pageNumber="22" type="nomenclature">
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<paragraph id="E6BC7ADBF60D7C2439CFAFBB1ADFB4D2" pageId="1" pageNumber="22">
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<taxonomicName id="500E478E2F2C54FC9CC6553E391C0A68" ID-CoL="4K84T" authority="Avdeev, 1975" authorityName="Avdeev" authorityYear="1975" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias diaphus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="diaphus">Pleopodias diaphus Avdeev, 1975</taxonomicName>
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</paragraph>
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</subSubSection>
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<subSubSection id="D93D4E76B71EA06C5D63A96F50D8E80F" pageId="1" pageNumber="22" type="reference_group">
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<paragraph id="9F1F683242575C3F855E77EFE91ABBB1" pageId="1" pageNumber="22">
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<taxonomicName id="A1E9C98161E4E8A37A0557B0DD2BA183" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias diaphus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="diaphus">Pleopodias diaphus</taxonomicName>
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Avdeev, 1975: 254-256, figs 1-11.-Bruce & Harrison-Nelson, 1988: 600.-Trilles, 1994: 109.-Yamauchi, 2009: 477-479, figs 7-8.
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</paragraph>
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<paragraph id="0743EBF830478B15401A8B9A06CD603D" pageId="1" pageNumber="22">
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<taxonomicName id="5EB06720580EF76B63B0C2C1738A9C38" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias superatus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="superatus">Pleopodias superatus</taxonomicName>
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Williams & Williams, 1986: 656, figs 62-68.
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</paragraph>
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</subSubSection>
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<subSubSection id="8164C004F79136313DB2C9C9F9B73C97" pageId="1" pageNumber="22" type="materials_examined">
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<paragraph id="D977908A49604E4D661E738E90FE1B9E" pageId="1" pageNumber="22">Material examined.</paragraph>
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<paragraph id="385F5073B75DF9526A19E9DBBB3565FE" pageId="1" pageNumber="22">
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Female holotype of
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<taxonomicName id="8B0F67D0AEC4D990B3D43297A9D947F4" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias superatus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="superatus">Pleopodias superatus</taxonomicName>
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(26.5 mm TL, 10.4 mm W), caught in a shrimp net off Honshu Island, Japan, 11 April 1969 (USNM 231069).
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</paragraph>
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<paragraph id="486D2A9587FBFD30ED2899733B18D51B" pageId="1" pageNumber="22">
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Holotype. Non-ovigerous female, collected from the East-China Sea (Sea of Japan), from the body of
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<taxonomicName id="E856E97B8A94BCB259924F0B01139430" family="Myctophidae" genus="Diaphus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Diaphus coeruleus" order="Myctophiformes" pageId="1" pageNumber="22" phylum="Chordata" rank="species" species="coeruleus">Diaphus coeruleus</taxonomicName>
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(TINRO AGK 74190). Paratypes. Non-ovigerous females, same information as holotype (TINRO APK 74191-74195). Not examined.
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</paragraph>
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<caption id="97BEF68DD2B2E990F0AB8893A2A5191A" pageId="1" pageNumber="22">
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<paragraph id="4121A525A8306CBF31662B2B7E099259" pageId="1" pageNumber="22">
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Figure 1.
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<taxonomicName id="DAE8715B80B4026F2FABD53AC808104C" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias diaphus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="diaphus">Pleopodias diaphus</taxonomicName>
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Avdeev, 1975 (USNM 231069), female (26 mm), (originally designated as the holotype of
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<taxonomicName id="BAB2E9CE87E87FB019BA7342DAEF89AA" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias superatus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="superatus">Pleopodias superatus</taxonomicName>
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Williams & Williams, 1986). A dorsal view B dorsal view of pereonite 1 and cephalon C pereopod 1 D ventral view of cephalon E pereopod 7 F dorsal view of pleon and pleotelson G lateral view.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="BB1381934EFE36D3878E53331BE6EABF" lastPageId="3" lastPageNumber="24" pageId="1" pageNumber="22" type="description">
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<paragraph id="8F70F33208EF619EF1E0456011276504" pageId="1" pageNumber="22">Description.</paragraph>
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<paragraph id="2FD20C6BDC84E3C072A24768C995900F" pageId="1" pageNumber="22">
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Female holotype of
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<taxonomicName id="868B896AE4C564E055674CC4CC8F4BE9" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias superatus" order="Isopoda" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="superatus">Pleopodias superatus</taxonomicName>
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. Length 26.5 mm, width 10.4 mm.
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</paragraph>
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<paragraph id="C4FB97ECD3E4874ABCB3997DB9685EB6" pageId="1" pageNumber="22">
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Body oval, 2.4 times as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5, most narrow at pereonite 1, lateral margins subparallel. Cephalon 0.8 times longer than wide, visible from dorsal view, subtriangular. Frontal margin truncate, thickened and ventrally folded. Eyes oval with distinct margins; one eye 0.3 times width of cephalon, 0.4 times length of cephalon. Pereonite 1 smooth, anterior border slightly indented, anterolateral angle narrowly rounded, extending to middle of the eye. Posterior margins of pereonites 1-4 smooth and straight, 5-7 slightly curved laterally, posterior margin of pereonite 7 produced medially. Coxae 2-3 narrow, with posteroventral angles rounded; 4-7 small and narrow, not extending past pereonite margin. Pereonites 1-5 increasing in length and width; 6-7 decreasing in length and width. Pereonite 7 partially overlapping pleonite 1. Pleonites posterior margin smooth, mostly concave. Pleonite 1 widest, visible in dorsal view. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded.
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<taxonomicName id="0BD8152F3E0A03A62FC4DDC44F69BF2E" genus="Pleonites" lsidName="Pleonites" pageId="1" pageNumber="22" rank="genus">Pleonites</taxonomicName>
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3-5 progressively getting smaller; pleonite 5 not overlapped by lateral margins of pleonite 4, posterior margin slightly concave. Pleotelson 1.8 times as long as anterior width, dorsal surface slightly depressed, lateral margins straight, posterior margin with medial notch.
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</paragraph>
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<paragraph id="3B247C333BB222E9C0EC8231506B0712" lastPageId="3" lastPageNumber="24" pageId="1" pageNumber="22">
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Antennula thinner and shorter than antenna, contiguous bases, consisting of 8 articles; peduncle articles 1 and 2 distinct and articulated; articles 2-3 expanded; extending to pereonite 2. Antenna consisting of 12 articles; extending to middle of pereonite 3. Pereopod 1 basis 1.6 times as long as greatest width; ischium 0.7 times as long as basis; merus proximal margin without bulbous protrusion; carpus with straight proximal margin; propodus 1.2 times as long as wide; dactylus slender, 1.5 times as long as
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<pageBreakToken id="8BC0052FD903EF3A489DEE32EF588A7A" pageId="2" pageNumber="23" start="start">propodus</pageBreakToken>
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, 2.4 times as long as basal width. Pereopod 7 longer than other pereopods, basis 2.2 times as long as greatest width; ischium 0.8 times as long as basis, without protrusions; merus proximal margin without bulbous protrusion, 1.2 times as long as wide, 0.5 times as long as ischium; carpus 0.9 times as long as wide, 0.4 times as long
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<pageBreakToken id="E67E221329CB360E8C7A3983AFECEBC8" pageId="3" pageNumber="24" start="start">as</pageBreakToken>
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ischium, without bulbous protrusion; propodus with numerous acute robust setae, 2.6 times as long as wide, 0.8 times as long as ischium; dactylus slender, 0.8 times as long as propodus, 3.3 times as long as basal width. Uropod longer than the pleotelson, rami subequal. Endopod apically rounded. Exopod apically narrowly rounded.
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</paragraph>
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</subSubSection>
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<subSubSection id="FFCD78C934F8937542A699451C150981" pageId="3" pageNumber="24" type="distribution">
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<paragraph id="BCC5592AD68A734D8F3F300DA0574807" pageId="3" pageNumber="24">Distribution.</paragraph>
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<paragraph id="CCF9F9251BE5CB0431AEDE66F1C092D1" pageId="3" pageNumber="24">
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Sea of Japan (
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<bibRefCitation id="998B51D385931E91EBBE6CAF05CD6955" author="Avdeev, VV" journalOrPublisher="Fisheries, Oceanography, Hydrobiology and Fish Parasitology of the Pacific Ocean" pageId="5" pageNumber="26" pagination="254 - 256" title="New representative of the parasitic isopod genus Pleopodias Richardson, 1910 (Cymothoidae)." volume="98" year="1975">Avdeev 1975</bibRefCitation>
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) and off Honshu, Japan (
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<bibRefCitation id="62819E6897A2E1831B772F6325672886" author="Williams, Jr. EH" journalOrPublisher="Proceedings of the Biological Society of Washington" pageId="7" pageNumber="28" pagination="647 - 657" title="The first Anilocra and Pleopodias isopods (Crustacea: Cymothoidae) parasitic on Japanese fishes, with three new species." volume="99" year="1986">Williams and Williams 1986</bibRefCitation>
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;
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<bibRefCitation id="A368BE0A616D853CC0BB86BDE3D40204" author="Yamauchi, T" journalOrPublisher="National Museum of Nature and Science Monographs" pageId="7" pageNumber="28" pagination="467 - 481" title="Deep-sea cymothoid isopods (Crustacea: Isopoda: Cymothoidae) of Pacific coast of northern Honshu, Japan." volume="39" year="2009">Yamauchi 2009</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="182EF98AE601C54A67ACDACA02B651E9" pageId="3" pageNumber="24" type="host">
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<paragraph id="FB4DEE098DF202E8B0D0F4D98C0B4439" pageId="3" pageNumber="24">Hosts.</paragraph>
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<paragraph id="562C9D750BC2C0A46FF9D74EAB2DFAF9" pageId="3" pageNumber="24">
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Anterior to the dorsal fin of
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<taxonomicName id="7CD3E5F15BC38F279AFB74DC0DDEA5EA" family="Myctophidae" genus="Diaphus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Diaphus coeruleus" order="Myctophiformes" pageId="3" pageNumber="24" phylum="Chordata" rank="species" species="coeruleus">Diaphus coeruleus</taxonomicName>
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(Blue lantern fish) (
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<bibRefCitation id="03945AD26BB649B8CCE09A6A92D28F93" author="Avdeev, VV" journalOrPublisher="Fisheries, Oceanography, Hydrobiology and Fish Parasitology of the Pacific Ocean" pageId="5" pageNumber="26" pagination="254 - 256" title="New representative of the parasitic isopod genus Pleopodias Richardson, 1910 (Cymothoidae)." volume="98" year="1975">Avdeev 1975</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="096C12391959CF1AB2012445F62129BE" pageId="3" pageNumber="24" type="remarks">
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<paragraph id="699D94070A8DB93CCD649B8888D9E41E" pageId="3" pageNumber="24">Remarks.</paragraph>
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<paragraph id="21E832FB2742F7A9F5FE3852AB9DACFC" pageId="3" pageNumber="24">
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<taxonomicName id="4BD476CD96F2756E98F7E8903D1C285F" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias diaphus" order="Isopoda" pageId="3" pageNumber="24" phylum="Arthropoda" rank="species" species="diaphus">Pleopodias diaphus</taxonomicName>
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has an ovate shape, contiguous antennula bases, and an emarginated pleotelson posterior margin. The uropod rami are approximately the same length and the eyes are large (each eye approximately a third of the cephalon width).
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</paragraph>
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<paragraph id="1FDE1C6B7CA8CDFBE001116DA3AF2DC1" pageId="3" pageNumber="24">
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It was originally described from Japan, with several drawings and a brief description in Russian. In
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<bibRefCitation id="3292615E403B34818761F448DC6B1B00" author="Williams, Jr. EH" journalOrPublisher="Proceedings of the Biological Society of Washington" pageId="7" pageNumber="28" pagination="647 - 657" title="The first Anilocra and Pleopodias isopods (Crustacea: Cymothoidae) parasitic on Japanese fishes, with three new species." volume="99" year="1986">1986</bibRefCitation>
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, Williams and Williams described a new species,
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<taxonomicName id="D86435E848F4C0EA3BF6E030FCD8A488" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias superatus" order="Isopoda" pageId="3" pageNumber="24" phylum="Arthropoda" rank="species" species="superatus">Pleopodias superatus</taxonomicName>
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which shared many similarities with
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<taxonomicName id="884AAE67FBEEC7FD49D94F0F0AFEF0EF" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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. After comparisons of the notched pleotelson as well as the antennae and somatic morphology,
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<bibRefCitation id="9C686301BACF74B8827C289E4C1A224B" author="Bruce, NL" journalOrPublisher="Proceedings of the Biological Society of Washington" pageId="6" pageNumber="27" pagination="585 - 602" title="New records of fish parasitic marine isopod crustaceans (Cymothoidae, subfamily Anilocrinae) from the Indo-west Pacific." volume="101" year="1988">Bruce and Harrison-Nelson (1988)</bibRefCitation>
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synonymised it with
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<taxonomicName id="D483A9F48E3A597C82F3C592A130C7BC" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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. Despite numerous attempts, the type specimens of
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<taxonomicName id="CC5AE2B9B2DD3D4153CCB48E97BABC5C" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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could not be obtained for inclusion in the present study; however, the types do exist and the species is eminently recognisable from the original illustrations and is therefore not a nomen dubium or species inquirenda.
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<bibRefCitation id="D2D9EB952B697F9E32D9572B2890FC66" author="Avdeev, VV" journalOrPublisher="Fisheries, Oceanography, Hydrobiology and Fish Parasitology of the Pacific Ocean" pageId="5" pageNumber="26" pagination="254 - 256" title="New representative of the parasitic isopod genus Pleopodias Richardson, 1910 (Cymothoidae)." volume="98" year="1975">Avdeev (1975)</bibRefCitation>
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reported the types as immature females but both the size and drawings indicate they are still adult females (non-ovigerous) and therefore suitable for a valid species description. Both species (
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<taxonomicName id="BF2A12F150E2F976D386E22C1A0FA533" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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and
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<taxonomicName id="F627D7319137ACD6A708E32267F9F7C4" lsidName="P. superatus" pageId="3" pageNumber="24" rank="species" species="superatus">P. superatus</taxonomicName>
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) are well illustrated, readily recognised, from the same region, and appear identical, thus the synonymy of the two species by
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<bibRefCitation id="C335BABB74B5B785EADAC831FEE6C96F" author="Bruce, NL" journalOrPublisher="Proceedings of the Biological Society of Washington" pageId="6" pageNumber="27" pagination="585 - 602" title="New records of fish parasitic marine isopod crustaceans (Cymothoidae, subfamily Anilocrinae) from the Indo-west Pacific." volume="101" year="1988">Bruce and Harrison-Nelson (1988)</bibRefCitation>
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is here upheld until a detailed redescription of the original type material of
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<taxonomicName id="777473A6DC2820A4328236BF001830C1" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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indicates otherwise.
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</paragraph>
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<paragraph id="4943E02722B4D6585FDAB65D2C2701F9" pageId="3" pageNumber="24">
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As the type material for
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<taxonomicName id="5CE9485583FE6B387D80E2AAF01F1A68" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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could not be obtained the redescription provided here is based on the holotype of
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<taxonomicName id="37838B875B0D61C0414DCE730626C1A0" lsidName="P. superatus" pageId="3" pageNumber="24" rank="species" species="superatus">P. superatus</taxonomicName>
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housed at USNM. This redescription includes updated measurements and characteristics which are comparable to the other
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<taxonomicName id="AD85969C925B8718A6A50AEBF3127C0C" class="Malacostraca" family="Cymothoidae" genus="Pleopodias" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pleopodias" order="Isopoda" pageId="3" pageNumber="24" phylum="Arthropoda" rank="genus">Pleopodias</taxonomicName>
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species in this paper. This modern description of the type material of
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<taxonomicName id="8C6809E1E6A67B6397416B24DD551F72" lsidName="P. superatus" pageId="3" pageNumber="24" rank="species" species="superatus">P. superatus</taxonomicName>
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will also aid future research into its current status as junior synonym of
|
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<taxonomicName id="B99FAE9649CFC09EB00CCF21025F4B3D" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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.
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</paragraph>
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<paragraph id="19D6C33601E1EAD11CA2068D35E22336" pageId="3" pageNumber="24">
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Pleopods and mouthparts of specimens identified as
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<taxonomicName id="9EAC1C3040D5E36734BCC26663699BAE" lsidName="P. diaphus" pageId="3" pageNumber="24" rank="species" species="diaphus">P. diaphus</taxonomicName>
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were drawn and described by
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<bibRefCitation id="92FA5A8F7D6DC1B87A8D386E86838219" author="Yamauchi, T" journalOrPublisher="National Museum of Nature and Science Monographs" pageId="7" pageNumber="28" pagination="467 - 481" title="Deep-sea cymothoid isopods (Crustacea: Isopoda: Cymothoidae) of Pacific coast of northern Honshu, Japan." volume="39" year="2009">Yamauchi (2009)</bibRefCitation>
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. The specimens
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<bibRefCitation id="C2D284153FEDA1EA59260D69FB4EA0B3" author="Yamauchi, T" journalOrPublisher="National Museum of Nature and Science Monographs" pageId="7" pageNumber="28" pagination="467 - 481" title="Deep-sea cymothoid isopods (Crustacea: Isopoda: Cymothoidae) of Pacific coast of northern Honshu, Japan." volume="39" year="2009">Yamauchi (2009)</bibRefCitation>
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examined largely conformed to the above description; however, the body size differed with the three more recent samples (12-27 mm in length) being more slender (3.4-3.9 times as long as wide).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |