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<document id="7B6C18804350D4DD8A37AE416BD17DC4" ID-DOI="10.11646/zootaxa.4622.1.1" ID-GBIF-Dataset="6c263a25-844c-46f3-8954-6fd01361de19" ID-ISSN="1175-5326" ID-Zenodo-Dep="3379899" ID-ZooBank="urn:lsid:zoobank.org:pub:4537BB46-452F-4E0C-A444-4AA5E12A64E7" IM.materialsCitations_approvedBy="admin" IM.tables_requiresApprovalFor="existingObjects" IM.treatments_approvedBy="admin" approvalRequired="1" approvalRequired_for_taxonomicNames="1" checkinTime="1561539743293" checkinUser="plazi" docAuthor="Ravichandran, S., Vigneshwaran, P. &amp; Rameshkumar, G." docDate="2019" docId="E129637EFFD2A40AFF47FB11FAFAFDE0" docLanguage="en" docName="zootaxa.4622.1.1.pdf.imf" docOrigin="Zootaxa 4622 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Ryukyua circularis" docType="treatment" docVersion="24" lastPageNumber="74" masterDocId="1D101B06FF9AA443FFD0FFDEFF9AFFFC" masterDocTitle="A taxonomic review of the fish parasitic isopod family Cymothoidae Leach, 1818 (Crustacea: Isopoda: Cymothooidea) of India" masterLastPageNumber="99" masterPageNumber="1" pageNumber="73" updateTime="1696193409291" updateUser="admin">
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<mods:title id="E6E2527CA668DBBAABA549BDBE171FE1">A taxonomic review of the fish parasitic isopod family Cymothoidae Leach, 1818 (Crustacea: Isopoda: Cymothooidea) of India</mods:title>
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<mods:namePart id="404A67E82868A64FCAEEFC5772626FC4">Vigneshwaran, P.</mods:namePart>
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<paragraph id="693FD268FFD2A40BFF47FB11FDB8FB15" blockId="72.[151,546,1231,1294]" box="[151,546,1231,1258]" pageId="72" pageNumber="73">
<heading id="32776504FFD2A40BFF47FB11FDB8FB15" bold="true" box="[151,546,1231,1258]" fontSize="11" level="1" pageId="72" pageNumber="73" reason="1">
<taxonomicName id="AE80A9EBFFD2A40BFF47FB11FDB8FB15" ID-CoL="78YMK" ID-ENA="1892237" authority="(Pillai, 1954)" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[151,546,1231,1258]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFF47FB11FDB8FB15" bold="true" box="[151,546,1231,1258]" pageId="72" pageNumber="73">
<emphasis id="5BF40E7AFFD2A40BFF47FB11FEE4FB16" bold="true" box="[151,382,1231,1258]" italics="true" pageId="72" pageNumber="73">Ryukyua circularis</emphasis>
(
<bibRefCitation id="0D11AF99FFD2A40BFE5DFB11FD80FB15" author="Pillai, N. K." box="[397,538,1231,1257]" pageId="72" pageNumber="73" pagination="1 - 22" refId="ref76528" refString="Pillai, N. K. (1954) A preliminary note on the Tanaidacea and Isopoda of Travancore. Bulletin of the Central Research Institute, University of Travancore, Trivandrum, 3, 1 - 22." type="journal article" year="1954">Pillai, 1954</bibRefCitation>
)
</emphasis>
</taxonomicName>
</heading>
</paragraph>
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<subSubSection id="219A81E3FFD2A40BFF47FB2DFEB1FAF2" box="[151,299,1267,1294]" pageId="72" pageNumber="73" type="description">
<paragraph id="693FD268FFD2A40BFF47FB2DFEB1FAF2" blockId="72.[151,546,1231,1294]" box="[151,299,1267,1294]" pageId="72" pageNumber="73">
(
<figureCitation id="F1BBCEEDFFD2A40BFF70FB2DFF77FAF2" box="[160,237,1267,1294]" captionStart="FIGURE 13" captionStartId="61.[151,250,1800,1825]" captionTargetBox="[151,1435,283,1750]" captionTargetId="figure@61.[151,1435,283,1750]" captionTargetPageId="61" captionText="FIGURE 13. ac, Nerocila sundaica Bleeker, 1857, female (24 mm), (ZSI/MBRC D1-547); df, Nerocila trichiura (Miers, 1877), female (30 mm), (ZSI/MBRC D1-548); gi, Norileca indica (H. Milne Edwards, 1840), female (26 mm), (ZSI/MBRC D1-549); jl, Norileca triangulata (Richardson, 1910), female (16 mm), (ZSI/MBRC D1-550); mo, Ryukyua circularis (Pillai, 1954), female (13 mm), (CAS/MBRM C-227); pr, Ryukyua globosa Williams &amp; Bunkley-Williams, 1994, female (14 mm), (ZSI/MBRC D1-552)." httpUri="https://zenodo.org/record/3379923/files/figure.png" pageId="72" pageNumber="73">Fig. 13</figureCitation>
mo)
</paragraph>
</subSubSection>
<subSubSection id="219A81E3FFD2A40BFF47FAECFBF3FA1F" pageId="72" pageNumber="73" type="reference_group">
<paragraph id="693FD268FFD2A40BFF47FAECFCA9FAB5" blockId="72.[151,1437,1328,1507]" box="[151,819,1328,1353]" pageId="72" pageNumber="73">
<treatmentCitationGroup id="4990F546FFD2A40BFF47FAECFCA9FAB5" box="[151,819,1328,1353]" pageId="72" pageNumber="73">
<taxonomicName id="AE80A9EBFFD2A40BFF47FAECFD9AFAB5" ID-CoL="6QKF5" authority="Pillai, 1954: 17" authorityName="Pillai" authorityPageNumber="17" authorityYear="1954" box="[151,512,1328,1353]" class="Malacostraca" family="Cymothoidae" genus="Livoneca" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFF47FAECFEC6FAB5" box="[151,348,1329,1353]" italics="true" pageId="72" pageNumber="73">Livoneca circularis</emphasis>
<treatmentCitation id="E821F479FFD2A40BFEB2FAEEFD9AFAB5" author="Pillai, N. K." box="[354,512,1328,1353]" page="17" pageId="72" pageNumber="73" year="1954">
<bibRefCitation id="0D11AF99FFD2A40BFEB2FAEEFD9AFAB5" author="Pillai, N. K." box="[354,512,1328,1353]" pageId="72" pageNumber="73" pagination="1 - 22" refId="ref76528" refString="Pillai, N. K. (1954) A preliminary note on the Tanaidacea and Isopoda of Travancore. Bulletin of the Central Research Institute, University of Travancore, Trivandrum, 3, 1 - 22." type="journal article" year="1954">Pillai, 1954: 17</bibRefCitation>
</treatmentCitation>
</taxonomicName>
;
<bibRefCitation id="0D11AF99FFD2A40BFDDBFAEEFD3CFAB5" author="Pillai, N. K." box="[523,678,1328,1353]" pageId="72" pageNumber="73" pagination="211 - 223" refId="ref76599" refString="Pillai, N. K. (1964) Parasitic isopods of the family Cymothoidae from South Indian fishes. Parasitology, 54, 211 - 223. https: // doi. org / 10.1017 / S 003118200006786 X" type="journal article" year="1964">1964: 218220</bibRefCitation>
, figs 4l, 5,
<specimenCount id="7F8619E1FFD2A40BFCC7FAEEFCA9FAB5" box="[791,819,1328,1353]" pageId="72" pageNumber="73" type="generic">7f.</specimenCount>
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</paragraph>
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<taxonomicName id="AE80A9EBFFD2A40BFF47FA8FFD31FA94" authority="Williams &amp; Williams, 1986: 213" authorityName="Williams &amp; Williams" authorityPageNumber="213" authorityYear="1986" box="[151,683,1359,1384]" class="Malacostraca" family="Cymothoidae" genus="Lironeca" higherTaxonomySource="CoL" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFF47FA8FFEC0FA94" box="[151,346,1360,1384]" italics="true" pageId="72" pageNumber="73">Lironeca circularis</emphasis>
Williams &amp; Williams, 1986: 213
</taxonomicName>
215, fig. 1ae.
</paragraph>
<paragraph id="693FD268FFD2A40BFF47FAB0FBF3FA1F" blockId="72.[151,1437,1328,1507]" pageId="72" pageNumber="73">
<emphasis id="5BF40E7AFFD2A40BFF47FAB0FEC5FA7A" box="[151,351,1390,1414]" italics="true" pageId="72" pageNumber="73">
<taxonomicName id="AE80A9EBFFD2A40BFF47FAB0FEC6FA7A" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[151,348,1390,1414]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">Ryukyua circularis</taxonomicName>
.
</emphasis>
<bibRefCitation id="0D11AF99FFD2A40BFEA8FAB0FCB6FA7B" author="Williams, E. H. Jr. &amp; Bunkley-Williams, L." box="[376,812,1390,1415]" pageId="72" pageNumber="73" pagination="155 - 161" refId="ref82177" refString="Williams, E. H. Jr. &amp; Bunkley-Williams, L. (1994) Ryukyua globosa n. gen., n. sp., and R. circularis n. comb., parasitic in the opercular chambers of Pacific and Indian Ocean clupeid fishes. Journal of Aquactic animal Health, 6, 155 - 161. https: // doi. org / 10.1577 / 1548 - 8667 (1994) 006 &lt;0155: RGNGNS&gt; 2.3. CO; 2" type="journal article" year="1994">Williams &amp; Bunkley-Williams, 1994: 160</bibRefCitation>
, figs 2832.—
<bibRefCitation id="0D11AF99FFD2A40BFC16FAB0FF76FA59" author="Ravichandran, S. &amp; Rameshkumar, G. &amp; Trilles, J. - P." pageId="72" pageNumber="73" pagination="232 - 234" refId="ref78367" refString="Ravichandran, S., Rameshkumar, G. &amp; Trilles, J. - P. (2011) New records of two parasitic cymothoids from Indian fishes. Journal of Parasitic Diseases, 35, 232 - 234. https: // doi. org / 10.1007 / s 12639 - 011 - 0046 - 3" type="journal article" year="2011">Trilles, Ravichandran &amp; Rameshkumar 2011: 453</bibRefCitation>
.—
<bibRefCitation id="0D11AF99FFD2A40BFEDAFA52FCC7FA59" author="Rameshkumar, G. &amp; Ravichandran, S. &amp; Allayie, S. A." box="[266,861,1420,1445]" pageId="72" pageNumber="73" pagination="127 - 132" refId="ref77635" refString="Rameshkumar, G., Ravichandran, S. &amp; Allayie, S. A. (2013 b) Study of the functional morphology of mouthparts of parasitic isopods of marine fishes. Asian Pacific Journal of Tropical Disease, 3 (2), 127 - 132. https: // doi. org / 10.1016 / S 2222 - 1808 (13) 60056 - 0" type="journal article" year="2013">Rameshkumar, Ravichandran &amp; Allayie, 2013b: 127132</bibRefCitation>
.—Aneesh, Helna &amp; Sudha, 2016:
<date id="1D3EF4A8FFD2A40BFB1AFA53FAA4FA59" box="[1226,1342,1421,1445]" pageId="72" pageNumber="73" value="1270" valueMax="1277">12701277</date>
, fig.
<quantity id="AE787F8DFFD2A40BFAA5FA53FA02FA59" box="[1397,1432,1421,1445]" metricMagnitude="0" metricUnit="m" metricValue="1.0" pageId="72" pageNumber="73" unit="m" value="1.0">1m</quantity>
, n.—Praveenraj, Saravanan, Puneeth Kumar, Ravichandran,Arunjyoti Baruah, Monalisha Devi, Kiruba Sankar &amp; Dam Roy, 2017: 593595, fig. 1.—
<bibRefCitation id="0D11AF99FFD2A40BFE6CFA14FB9CFA1F" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." box="[444,1030,1482,1507]" pageId="72" pageNumber="73" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">Vigneshwaran, Ravichandran &amp; Martin, 2018d: 200205</bibRefCitation>
, figs 16.
</paragraph>
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<emphasis id="5BF40E7AFFD2A40BFF47F9D4FE3EF9D8" bold="true" box="[151,420,1545,1572]" pageId="72" pageNumber="73">Type and type locality.</emphasis>
<materialsCitation id="D9E8D835FFD2A40BFE7AF9D4FE1AF9B4" ID-GBIF-Occurrence="2366496664" country="India" location="Trivandrum" pageId="72" pageNumber="73" specimenCount="1">
The type, Pillais Indian specimens of
<taxonomicName id="AE80A9EBFFD2A40BFC88F9D5FBA8F9D8" authorityName="Pillai" authorityYear="1954" box="[856,1074,1546,1572]" class="Malacostraca" family="Cymothoidae" genus="Livoneca" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFC88F9D5FBA8F9D8" box="[856,1074,1546,1572]" italics="true" pageId="72" pageNumber="73">Livoneca circularis</emphasis>
</taxonomicName>
are not extant. The type locality is
<location id="6C5F84B3FFD2A40BFF60F9F0FEA2F9B4" LSID="urn:lsid:plazi:treatment:E129637EFFD2A40AFF47FB11FAFAFDE0:6C5F84B3FFD2A40BFF60F9F0FEA2F9B4" box="[176,312,1582,1608]" country="India" name="Trivandrum" pageId="72" pageNumber="73">Trivandrum</location>
,
<collectingCountry id="119792F8FFD2A40BFE93F9F0FE1AF9B4" box="[323,384,1582,1608]" name="India" pageId="72" pageNumber="73">India</collectingCountry>
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.
</paragraph>
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<emphasis id="5BF40E7AFFD2A40BFF17F98FFE36F990" bold="true" box="[199,428,1617,1644]" pageId="72" pageNumber="73">Material examined</emphasis>
.
<materialsCitation id="D9E8D835FFD2A40BFE6CF98FFD43F96D" collectedFrom="from Amblygaster clupeoides" collectingDate="2017-05-18" collectionCode="CAS, MBRM, C-" collectorName="P. Vigneshwaran" location="Mandapam" pageId="72" pageNumber="73" specimenCount="5" specimenCount-female="5">
<specimenCount id="7F8619E1FFD2A40BFE6CF98FFDEAF990" box="[444,624,1617,1644]" count="5" pageId="72" pageNumber="73" type="female">5 ovig. females</specimenCount>
, (
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),
<location id="6C5F84B3FFD2A40BFCDEF98CFC15F990" LSID="urn:lsid:plazi:treatment:E129637EFFD2A40AFF47FB11FAFAFDE0:6C5F84B3FFD2A40BFCDEF98CFC15F990" box="[782,911,1618,1644]" name="Mandapam" pageId="72" pageNumber="73">Mandapam</location>
,
<date id="1D3EF4A8FFD2A40BFC4CF98CFBA3F990" box="[924,1081,1618,1645]" pageId="72" pageNumber="73" value="2017-05-18">
<collectingDate id="0D7A0D40FFD2A40BFC4CF98CFBA3F990" box="[924,1081,1618,1645]" pageId="72" pageNumber="73" value="2017-05-18">18 May 2017</collectingDate>
</date>
,
<collectedFrom id="DA9C9195FFD2A40BFB97F98CFA0FF990" box="[1095,1429,1618,1644]" pageId="72" pageNumber="73">
from
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<emphasis id="5BF40E7AFFD2A40BFB57F98CFA0FF990" box="[1159,1429,1618,1644]" italics="true" pageId="72" pageNumber="73">Amblygaster clupeoides</emphasis>
</taxonomicName>
</collectedFrom>
, coll.
<collectorName id="C475B7BEFFD2A40BFF1EF9A9FE1DF96C" box="[206,391,1654,1681]" pageId="72" pageNumber="73">P. Vigneshwaran</collectorName>
(
<collectionCode id="0F914AADFFD2A40BFE45F9A8FE51F96C" box="[405,459,1654,1680]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="72" pageNumber="73" type="Museum">CAS</collectionCode>
/
<collectionCode id="0F914AADFFD2A40BFE03F9A8FDB6F96C" box="[467,556,1654,1680]" pageId="72" pageNumber="73">MBRM</collectionCode>
<collectionCode id="0F914AADFFD2A40BFDE2F9A8FDD4F96D" box="[562,590,1654,1681]" pageId="72" pageNumber="73">C-</collectionCode>
222
<collectionCode id="0F914AADFFD2A40BFD5AF9A8FD3CF96D" box="[650,678,1654,1681]" pageId="72" pageNumber="73">C-</collectionCode>
226)
</materialsCitation>
;
<materialsCitation id="D9E8D835FFD2A40BFD33F9A8FA02F96C" ID-GBIF-Occurrence="2366496644" box="[739,1432,1654,1681]" collectedFrom="from Amblygaster clupeoides" collectingDate="2017-05-18" collectionCode="CAS, MBRM" collectorName="P. Vigneshwaran" location="Mandapam" pageId="72" pageNumber="73" specimenCode="C-227, C-228" specimenCount="2" specimenCount-female="2" specimenCount-male="2">
<specimenCount id="7F8619E1FFD2A40BFD33F9A8FC24F96C" box="[739,958,1654,1681]" count="2" pageId="72" pageNumber="73" type="female">2 non ovig. females</specimenCount>
(
<quantity id="AE787F8DFFD2A40BFC1DF9A8FBA0F96D" box="[973,1082,1654,1681]" metricMagnitude="-3" metricUnit="m" metricValue="9.12" pageId="72" pageNumber="73" unit="mm" value="9.12">9, 12 mm</quantity>
), (
<collectionCode id="0F914AADFFD2A40BFB84F9A8FB10F96C" box="[1108,1162,1654,1680]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="72" pageNumber="73" type="Museum">CAS</collectionCode>
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<specimenCode id="39267A13FFD2A40BFB21F9A8FAA3F96C" box="[1265,1337,1654,1680]" collectionCode="C-" pageId="72" pageNumber="73">C-227</specimenCode>
<specimenCode id="39267A13FFD2A40BFA98F9A8FA0AF96C" box="[1352,1424,1654,1680]" collectionCode="C-" pageId="72" pageNumber="73">C-228</specimenCode>
)
</materialsCitation>
;
<materialsCitation id="D9E8D835FFD2A40BFF47F944FD25F948" ID-GBIF-Occurrence="2366496644" box="[151,703,1690,1717]" collectedFrom="from Amblygaster clupeoides" collectingDate="2017-05-18" collectionCode="CAS, MBRM" collectorName="P. Vigneshwaran" location="Mandapam" pageId="72" pageNumber="73" specimenCode="C-229, C-230" specimenCount="2" specimenCount-female="2" specimenCount-male="2">
<specimenCount id="7F8619E1FFD2A40BFF47F944FF77F948" box="[151,237,1690,1716]" count="2" pageId="72" pageNumber="73" type="male">2 males</specimenCount>
(
<quantity id="AE787F8DFFD2A40BFF2EF944FEC5F949" box="[254,351,1690,1717]" metricMagnitude="-3" metricUnit="m" metricValue="7.8" pageId="72" pageNumber="73" unit="mm" value="7.8">7, 8 mm</quantity>
), (
<collectionCode id="0F914AADFFD2A40BFEA9F944FE35F948" box="[377,431,1690,1716]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="72" pageNumber="73" type="Museum">CAS</collectionCode>
/
<collectionCode id="0F914AADFFD2A40BFE68F944FD8BF948" box="[440,529,1690,1716]" pageId="72" pageNumber="73">MBRM</collectionCode>
<specimenCode id="39267A13FFD2A40BFDC7F944FDC5F948" box="[535,607,1690,1716]" collectionCode="C-" pageId="72" pageNumber="73">C-229</specimenCode>
<specimenCode id="39267A13FFD2A40BFDBEF944FD2CF948" box="[622,694,1690,1716]" collectionCode="C-" pageId="72" pageNumber="73">C-230</specimenCode>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="219A81E3FFD2A40BFF17F960FEE0F805" pageId="72" pageNumber="73" type="discussion">
<paragraph id="693FD268FFD2A40BFF17F960FBC9F895" blockId="72.[151,1436,1545,2041]" pageId="72" pageNumber="73">
<emphasis id="5BF40E7AFFD2A40BFF17F960FEA1F924" bold="true" box="[199,315,1726,1752]" pageId="72" pageNumber="73">Remarks.</emphasis>
<taxonomicName id="AE80A9EBFFD2A40BFE93F960FD8DF924" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[323,535,1726,1752]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFE93F960FD8DF924" box="[323,535,1726,1752]" italics="true" pageId="72" pageNumber="73">Ryukyua circularis</emphasis>
</taxonomicName>
can be recognized by its oval to rounded body shape, widest at pereonites 35, cephalon deeply immersed in pereonite 1. The pleotelson of
<taxonomicName id="AE80A9EBFFD2A40BFCE8F93DFC59F900" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[824,963,1762,1788]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFCE8F93DFC59F900" box="[824,963,1762,1788]" italics="true" pageId="72" pageNumber="73">R. circularis</emphasis>
</taxonomicName>
is anterior lateral margins weakly convex, posterior margin roughly triangular and the uropods half the length of pleotelson, rami not extending beyond the pleotelson. Furthermore, pleonites 13 partially overlapped by a posterolateral margin of pereonite 7. More recently the Indian specimen of
<taxonomicName id="AE80A9EBFFD2A40BFE4EF891FDB3F894" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[414,553,1870,1896]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFE4EF891FDB3F894" box="[414,553,1870,1896]" italics="true" pageId="72" pageNumber="73">R. circularis</emphasis>
</taxonomicName>
was redescribed by
<bibRefCitation id="0D11AF99FFD2A40BFCDDF890FBD5F895" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." box="[781,1103,1870,1897]" pageId="72" pageNumber="73" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">
Vigneshwaran
<emphasis id="5BF40E7AFFD2A40BFC64F891FC76F894" box="[948,1004,1870,1896]" italics="true" pageId="72" pageNumber="73">et al.</emphasis>
(2018d)
</bibRefCitation>
.
</paragraph>
<paragraph id="693FD268FFD2A40BFF17F8ACFEE0F805" blockId="72.[151,1436,1545,2041]" pageId="72" pageNumber="73">
<taxonomicName id="AE80A9EBFFD2A40BFF17F8ACFE03F870" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[199,409,1906,1932]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="72" pageNumber="73" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD2A40BFF17F8ACFE03F870" box="[199,409,1906,1932]" italics="true" pageId="72" pageNumber="73">Ryukyua circularis</emphasis>
</taxonomicName>
attaches to the ventral part of the host branchial cavity, with the cephalon to the anterior end of the host, and with its dorsal side (pereon and pleon) directed outwards, facing the branchial cavity. Its rounded and slightly asymmetrical body thus it occupies both branchial cavity of host fish (Rameshkumar
<emphasis id="5BF40E7AFFD2A40BFAC6F865FAC8F828" box="[1302,1362,1978,2004]" italics="true" pageId="72" pageNumber="73">et al.</emphasis>
2013; Aneesh
<emphasis id="5BF40E7AFFD2A40BFF22F801FEB0F804" box="[242,298,2014,2040]" italics="true" pageId="72" pageNumber="73">et al.</emphasis>
2016).
</paragraph>
</subSubSection>
<subSubSection id="219A81E3FFD3A40AFF17FF47FAC7FE4C" pageId="73" pageNumber="74" type="description">
<paragraph id="693FD268FFD3A40AFF17FF47FA90FEBF" blockId="73.[151,1436,153,540]" pageId="73" pageNumber="74">
<taxonomicName id="AE80A9EBFFD3A40AFF17FF47FE00FF4F" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[199,410,153,179]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD3A40AFF17FF47FE00FF4F" box="[199,410,153,179]" italics="true" pageId="73" pageNumber="74">Ryukyua circularis</emphasis>
</taxonomicName>
and
<taxonomicName id="AE80A9EBFFD3A40AFE1FFF44FDDDFF4F" authorityName="Williams &amp; Bunkley-Williams" authorityYear="1994" box="[463,583,153,179]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="species" species="globosa">
<emphasis id="5BF40E7AFFD3A40AFE1FFF44FDDDFF4F" box="[463,583,153,179]" italics="true" pageId="73" pageNumber="74">R. globosa</emphasis>
</taxonomicName>
have a near identical morphology of cephalon deeply immersed in pereonite 1; body widest at pereonites 36; pereopods with rather a broad basis, elongate ischium and short propodus; and all pleopods are laminar. The host distribution of both species of
<taxonomicName id="AE80A9EBFFD3A40AFC91FF3FFC3BFF07" authorityName="Williams &amp; Bunkley-Williams" authorityYear="1994" box="[833,929,225,251]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="genus">
<emphasis id="5BF40E7AFFD3A40AFC91FF3FFC3BFF07" box="[833,929,225,251]" italics="true" pageId="73" pageNumber="74">Ryukyua</emphasis>
</taxonomicName>
similar.
<taxonomicName id="AE80A9EBFFD3A40AFBD0FF3CFBE2FF07" authorityName="Williams &amp; Bunkley-Williams" authorityYear="1994" box="[1024,1144,225,251]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="species" species="globosa">
<emphasis id="5BF40E7AFFD3A40AFBD0FF3CFBE2FF07" box="[1024,1144,225,251]" italics="true" pageId="73" pageNumber="74">R. globosa</emphasis>
</taxonomicName>
can be distinguished from
<taxonomicName id="AE80A9EBFFD3A40AFF47FED8FEBBFEE3" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[151,289,261,287]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD3A40AFF47FED8FEBBFEE3" box="[151,289,261,287]" italics="true" pageId="73" pageNumber="74">R. circularis</emphasis>
</taxonomicName>
by being broad and rounded body shape, the posterolateral margin of pereonite 7 produced and overlap all pleonites, pleotelson a little wider than long and having a rectangular instead of a triangular shape.
</paragraph>
<paragraph id="693FD268FFD3A40AFF17FE92FB56FE70" blockId="73.[151,1436,153,540]" pageId="73" pageNumber="74">
<emphasis id="5BF40E7AFFD3A40AFF17FE92FEBAFE9B" bold="true" box="[199,288,332,359]" pageId="73" pageNumber="74">Colour.</emphasis>
Both female and male appear white to yellowish-tan in alcohol; manca appear mahogany brown, with chromatophores scattered posteriorly on the pereon and pleotelson (
<bibRefCitation id="0D11AF99FFD3A40AFC5EFEAFFB5BFE70" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." box="[910,1217,369,396]" pageId="73" pageNumber="74" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">
Vigneshwaran
<emphasis id="5BF40E7AFFD3A40AFBE7FEACFBF5FE77" box="[1079,1135,369,395]" italics="true" pageId="73" pageNumber="74">et al.</emphasis>
2018d
</bibRefCitation>
).
</paragraph>
<paragraph id="693FD268FFD3A40AFF17FE4AFAC7FE4C" blockId="73.[151,1436,153,540]" box="[199,1373,404,432]" pageId="73" pageNumber="74">
<emphasis id="5BF40E7AFFD3A40AFF17FE4AFF64FE53" bold="true" box="[199,254,404,431]" pageId="73" pageNumber="74">Size.</emphasis>
Ovig. females
<quantity id="AE787F8DFFD3A40AFE79FE4BFD8DFE53" box="[425,535,405,431]" metricMagnitude="-2" metricUnit="m" metricValue="1.1" metricValueMax="1.3" metricValueMin="0.9" pageId="73" pageNumber="74" unit="mm" value="11.0" valueMax="13.0" valueMin="9.0">913 mm</quantity>
; non ovig. females
<quantity id="AE787F8DFFD3A40AFD22FE4BFCFAFE53" box="[754,864,405,431]" metricMagnitude="-2" metricUnit="m" metricValue="1.05" metricValueMax="1.2" metricValueMin="0.9" pageId="73" pageNumber="74" unit="mm" value="10.5" valueMax="12.0" valueMin="9.0">912 mm</quantity>
; males
<quantity id="AE787F8DFFD3A40AFC63FE4BFB8AFE53" box="[947,1040,405,431]" metricMagnitude="-3" metricUnit="m" metricValue="7.0" metricValueMax="8.0" metricValueMin="6.0" pageId="73" pageNumber="74" unit="mm" value="7.0" valueMax="8.0" valueMin="6.0">68 mm</quantity>
(
<bibRefCitation id="0D11AF99FFD3A40AFBCEFE4BFACBFE4C" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." box="[1054,1361,405,432]" pageId="73" pageNumber="74" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">
Vigneshwaran
<emphasis id="5BF40E7AFFD3A40AFB17FE48FA9AFE53" box="[1223,1280,405,431]" italics="true" pageId="73" pageNumber="74">et al.</emphasis>
2018d
</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="219A81E3FFD3A40AFF17FE66FE18FE04" pageId="73" pageNumber="74" type="distribution">
<paragraph id="693FD268FFD3A40AFF17FE66FE18FE04" blockId="73.[151,1436,153,540]" pageId="73" pageNumber="74">
<emphasis id="5BF40E7AFFD3A40AFF17FE66FEFBFE2F" bold="true" box="[199,353,440,467]" pageId="73" pageNumber="74">Distribution.</emphasis>
The species
<taxonomicName id="AE80A9EBFFD3A40AFE3FFE64FDE3FE2F" baseAuthorityName="Pillai" baseAuthorityYear="1954" box="[495,633,441,467]" class="Malacostraca" family="Cymothoidae" genus="Ryukyua" kingdom="Animalia" order="Isopoda" pageId="73" pageNumber="74" phylum="Arthropoda" rank="species" species="circularis">
<emphasis id="5BF40E7AFFD3A40AFE3FFE64FDE3FE2F" box="[495,633,441,467]" italics="true" pageId="73" pageNumber="74">R. circularis</emphasis>
</taxonomicName>
has been known to distribute in widely. For locality details see
<bibRefCitation id="0D11AF99FFD3A40AFAE7FE67FEE4FE04" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." pageId="73" pageNumber="74" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">
Vigneshwaran
<emphasis id="5BF40E7AFFD3A40AFF33FE00FE81FE0B" box="[227,283,477,503]" italics="true" pageId="73" pageNumber="74">et al.</emphasis>
(2018d)
</bibRefCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="219A81E3FFD3A40AFF17FDDFFAFAFDE0" box="[199,1376,513,540]" pageId="73" pageNumber="74" type="biology_ecology">
<paragraph id="693FD268FFD3A40AFF17FDDFFAFAFDE0" blockId="73.[151,1436,153,540]" box="[199,1376,513,540]" pageId="73" pageNumber="74">
<emphasis id="5BF40E7AFFD3A40AFF17FDDFFE9CFDE7" bold="true" box="[199,262,513,539]" pageId="73" pageNumber="74">Host.</emphasis>
Known only from family
<taxonomicName id="AE80A9EBFFD3A40AFDFDFDDFFD38FDE7" authorityName="Rafinesque" authorityYear="1810" box="[557,674,513,539]" class="Actinopterygii" family="Clupeidae" kingdom="Animalia" order="Clupeiformes" pageId="73" pageNumber="74" phylum="Chordata" rank="family">Clupeidae</taxonomicName>
. For fish host species details, see
<bibRefCitation id="0D11AF99FFD3A40AFBCAFDDFFAC6FDE0" author="Vigneshwaran, P. &amp; Ravichandran, S. &amp; Martin, M. B." box="[1050,1372,513,540]" pageId="73" pageNumber="74" pagination="195 - 206" refId="ref81693" refString="Vigneshwaran, P., Ravichandran, S. &amp; Martin, M. B. (2018 d) Redescription of Ryukyua circularis (Pillai, 1954) (Isopoda, Cymothoidae), parasite of the Bleeker smoothbelly sardinella Amblygaster clupeoides Bleeker, 1849 from India. Zootaxa, 4526 (2), 195 - 206. https: // doi. org / 10.11646 / zootaxa. 4526.2.5" type="journal article" year="2018">
Vigneshwaran
<emphasis id="5BF40E7AFFD3A40AFB11FDDCFB60FDE7" box="[1217,1274,513,539]" italics="true" pageId="73" pageNumber="74">et al.</emphasis>
(2018d)
</bibRefCitation>
.
</paragraph>
</subSubSection>
</treatment>
</document>