244 lines
26 KiB
XML
244 lines
26 KiB
XML
<document id="F8B13419306880956FD9199DF400FE3D" ID="10.11646/zootaxa.4150.3.2" ID-DOI="10.11646/zootaxa.4150.3.2" ID-GBIF-Dataset="8347a890-caad-4a81-8a02-8ec476083ffb" ID-ISSN="1175-5326" ID-Zenodo-Dep="272101" ID-ZooBank="08E63512-49DB-495C-83FC-CDF206A516CF" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1470983924873" checkinUser="plazi" docAuthor="Gordon, Cat A., Hood, Ali R. & Ellis, Jim R." docDate="2016" docId="03C2E354FFCBFFCCFF49FD01FA645DAE" docLanguage="en" docName="zootaxa.4150.3.2.pdf" docOrigin="Zootaxa 4150 (3)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Dipturus batis Linnaeus 1758" docType="treatment" docVersion="9" lastPageNumber="260" masterDocId="FFFB9B2CFFCEFFCAFFDEFFB5FFF25D59" masterDocTitle="Descriptions and revised key to the eggcases of the skates (Rajiformes: Rajidae) and catsharks (Carcharhiniformes: Scyliorhinidae) of the British Isles" masterLastPageNumber="280" masterPageNumber="255" pageNumber="260" updateTime="1698381824525" updateUser="plazi">
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<mods:title id="57BDA3F3E261244D5E1FFBAEC8174046">Descriptions and revised key to the eggcases of the skates (Rajiformes: Rajidae) and catsharks (Carcharhiniformes: Scyliorhinidae) of the British Isles</mods:title>
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<mods:namePart id="B845152BBF74730BCD5F398829F8B00B">Gordon, Cat A.</mods:namePart>
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<mods:namePart id="66FEB9036BD0642B724AB554CD2D0AD4">Hood, Ali R.</mods:namePart>
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<mods:namePart id="887E908A7DF006F83EA1A87179E346A3">Ellis, Jim R.</mods:namePart>
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<mods:typeOfResource id="329126038055AF50447054A057B4DED5">text</mods:typeOfResource>
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<mods:title id="1CFE0EBE698B1DC0D87F748EF6039C7A">Zootaxa</mods:title>
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<mods:date id="1DCD0717FFCF16F4C8F8C7ED07D922FA">2016</mods:date>
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<treatment id="03C2E354FFCBFFCCFF49FD01FA645DAE" ID-DOI="http://doi.org/10.5281/zenodo.5631356" ID-GBIF-Taxon="124329265" ID-Zenodo-Dep="5631356" LSID="urn:lsid:plazi:treatment:03C2E354FFCBFFCCFF49FD01FA645DAE" httpUri="http://treatment.plazi.org/id/03C2E354FFCBFFCCFF49FD01FA645DAE" lastPageId="6" lastPageNumber="260" pageId="5" pageNumber="260">
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<subSubSection id="C37101C9FFCBFFCFFF49FD01FDE85F97" box="[151,538,692,718]" pageId="5" pageNumber="260" type="nomenclature">
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<paragraph id="8BD45242FFCBFFCFFF49FD01FDE85F97" blockId="5.[151,538,692,718]" box="[151,538,692,718]" pageId="5" pageNumber="260">
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<heading id="D09CE52EFFCBFFCFFF49FD01FDE85F97" bold="true" box="[151,538,692,718]" fontSize="11" level="1" pageId="5" pageNumber="260" reason="1">
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<taxonomicName id="4C6B29C1FFCBFFCFFF49FD01FDE85F97" ID-CoL="36R33" authority="Linnaeus, 1758" authorityName="Linnaeus" authorityYear="1758" box="[151,538,692,718]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">
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<emphasis id="B91F8E50FFCBFFCFFF49FD01FDE85F97" bold="true" box="[151,538,692,718]" pageId="5" pageNumber="260">
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<emphasis id="B91F8E50FFCBFFCFFF49FD01FEB15F97" bold="true" box="[151,323,692,718]" italics="true" pageId="5" pageNumber="260">Dipturus batis</emphasis>
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(Linnaeus, 1758)
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</emphasis>
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</taxonomicName>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C37101C9FFCBFFCFFF49FD4FFB115E02" pageId="5" pageNumber="260" type="distribution">
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<paragraph id="8BD45242FFCBFFCFFF49FD4FFB115E02" blockId="5.[151,1437,762,2011]" pageId="5" pageNumber="260">
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<emphasis id="B91F8E50FFCBFFCFFF49FD4FFEC25E4A" bold="true" box="[151,304,762,787]" pageId="5" pageNumber="260">Distribution.</emphasis>
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Blue (or grey) skate (
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<emphasis id="B91F8E50FFCBFFCFFDF2FD4EFD7E5E4A" box="[556,652,763,787]" italics="true" pageId="5" pageNumber="260">
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<taxonomicName id="4C6B29C1FFCBFFCFFDF2FD4EFD7A5E4A" box="[556,648,763,787]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">D. batis</taxonomicName>
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,
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</emphasis>
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the form described by
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<bibRefCitation id="EFFA2FB3FFCBFFCFFC4AFD4FFB8C5E4A" box="[916,1150,762,787]" pageId="5" pageNumber="260" refString="Iglesias, S. P., Toulhohoat, L. & Sellos, D. Y. (2010) Taxonomic confusion and market mislabelling of threatened skates: important consequences for their conservation status. Aquatic Conservation: Marine and Freshwater Ecosystems, 20, 319 - 333. http: // dx. doi. org / 10.1002 / aqc. 1083" type="journal article">
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Iglésias
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<emphasis id="B91F8E50FFCBFFCFFC2CFD4EFBD95E4A" box="[1010,1067,763,787]" italics="true" pageId="5" pageNumber="260">et al.</emphasis>
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(2010)
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</bibRefCitation>
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as
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<taxonomicName id="4C6B29C1FFCBFFCFFB7BFD4EFA605E4A" box="[1189,1426,762,787]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="flossada">
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<emphasis id="B91F8E50FFCBFFCFFB7BFD4EFAFB5E4B" box="[1189,1289,763,786]" italics="true" pageId="5" pageNumber="260">Dipturus</emphasis>
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cf.
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<emphasis id="B91F8E50FFCBFFCFFAEBFD4EFA605E4A" box="[1333,1426,763,787]" italics="true" pageId="5" pageNumber="260">flossada</emphasis>
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</taxonomicName>
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) generally has a more southerly distribution than
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<taxonomicName id="4C6B29C1FFCBFFCFFD6CFCAAFB945E6E" authority="Parnell, 1837" authorityName="Parnell" authorityYear="1837" box="[690,1126,798,823]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="intermedia">
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<emphasis id="B91F8E50FFCBFFCFFD6CFCAAFCE45E6F" box="[690,790,799,822]" italics="true" pageId="5" pageNumber="260">Dipturus</emphasis>
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cf.
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<emphasis id="B91F8E50FFCBFFCFFCE1FCABFC4B5E6F" box="[831,953,798,822]" italics="true" pageId="5" pageNumber="260">intermedia</emphasis>
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(Parnell, 1837)
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</taxonomicName>
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however the distribution of both species overlaps in the area from the Celtic Sea to northwest
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<collectingCountry id="F37C12D2FFCBFFCFFCA5FCF7FC2F5E02" box="[891,989,834,859]" name="United Kingdom" pageId="5" pageNumber="260">Scotland</collectingCountry>
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(
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<bibRefCitation id="EFFA2FB3FFCBFFCFFC35FCF7FB255E02" author="Griffiths" box="[1003,1239,834,859]" pageId="5" pageNumber="260" refString="Griffiths, A. M., Sims, D. W., Cotterell, S. P., El Nagar, A., Ellis, J. R., Lynghammar, A., McHugh, M., Neat, F. C., Pade, N. G., Queiroz, N., Serra-Pereira, B., Rapp, T., Wearmouth, V. J. & Genner, M. J. (2010) Molecular markers reveal spatially segregated cryptic species in a critically endangered fish, the common skate (Dipturus batis). Proceedings of the Royal Society B, 277, 1497 - 1503. http: // dx. doi. org / 10.1098 / rspb. 2009.2111" type="journal article" year="2010">
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Griffiths
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<emphasis id="B91F8E50FFCBFFCFFB8AFCF6FB615E02" box="[1108,1171,835,859]" italics="true" pageId="5" pageNumber="260">et al.,</emphasis>
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2010
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</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="C37101C9FFCBFFCFFF19FCD3FD95596B" pageId="5" pageNumber="260" type="materials_examined">
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<paragraph id="8BD45242FFCBFFCFFF19FCD3FD95596B" blockId="5.[151,1437,762,2011]" pageId="5" pageNumber="260">
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<emphasis id="B91F8E50FFCBFFCFFF19FCD3FE455E26" bold="true" box="[199,439,870,895]" pageId="5" pageNumber="260">Material examined.</emphasis>
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Twenty-four eggcases were examined for this study. Most samples (n = 22) were removed from mature females that were captured by gillnet on the fishing grounds west of the
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<collectingRegion id="49AF9CA0FFCBFFCFFB24FC3FFA6E5EFA" box="[1274,1436,906,931]" country="United Kingdom" name="Isles of Scilly" pageId="5" pageNumber="260">Isles of Scilly</collectingRegion>
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(
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<bibRefCitation id="EFFA2FB3FFCBFFCFFF40FC1BFE8D5E9E" author="Bendall" box="[158,383,942,967]" pageId="5" pageNumber="260" refString="Bendall, V. A., Hetherington, S. J., Ellis, J. R., Smith, S. F., Ives, M. J., Gregson, J. & Riley, A. A. (2012) Spurdog, porbeagle and common skate bycatch and discard reduction. CEFAS (Lowestoft) Fisheries Science Partnership Report 2011 - 2012; 88 pp." type="book" year="2012">
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Bendall
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<emphasis id="B91F8E50FFCBFFCFFF23FC1AFEC75E9F" box="[253,309,942,966]" italics="true" pageId="5" pageNumber="260">et al.</emphasis>
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, 2012
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</bibRefCitation>
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). The remaining two eggcases examined were museum specimens collected from Scarborough (
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<collectionCode id="ED7ACA87FFCBFFCFFF40FC66FF065EB2" box="[158,244,979,1003]" pageId="5" pageNumber="260">BMNH</collectionCode>
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1928.11.1.1–2). Two
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<taxonomicName id="4C6B29C1FFCBFFCFFE2BFC66FDA35EB2" box="[501,593,979,1003]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">
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<emphasis id="B91F8E50FFCBFFCFFE2BFC66FDA35EB2" box="[501,593,979,1003]" italics="true" pageId="5" pageNumber="260">D. batis</emphasis>
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</taxonomicName>
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eggcases found on Perranporth Beach (northern
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<collectingRegion id="49AF9CA0FFCBFFCFFB50FC67FB0A5EB2" box="[1166,1272,978,1003]" country="United Kingdom" name="Cornwall" pageId="5" pageNumber="260">Cornwall</collectingRegion>
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) in
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<date id="FFD57482FFCBFFCFFAF5FC67FA6E5EB2" box="[1323,1436,978,1003]" pageId="5" pageNumber="260" value="2014-07">July 2014</date>
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were reported to the Great Eggcase Hunt in
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<date id="FFD57482FFCBFFCFFD5FFC43FCFA5956" box="[641,776,1014,1039]" pageId="5" pageNumber="260" value="2015-03">March 2015</date>
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(and identification confirmed from photographs), however they were not available for measurement.
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</paragraph>
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</subSubSection>
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<subSubSection id="C37101C9FFCBFFCFFF19FB8BFE0A58BA" pageId="5" pageNumber="260" type="description">
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<paragraph id="8BD45242FFCBFFCFFF19FB8BFE0A58BA" blockId="5.[151,1437,762,2011]" pageId="5" pageNumber="260">
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<emphasis id="B91F8E50FFCBFFCFFF19FB8BFEAB590E" bold="true" box="[199,345,1086,1111]" pageId="5" pageNumber="260">Description.</emphasis>
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The eggcase of
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<taxonomicName id="4C6B29C1FFCBFFCFFDCAFB8AFD9F590F" box="[532,621,1086,1110]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">
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<emphasis id="B91F8E50FFCBFFCFFDCAFB8AFD9F590F" box="[532,621,1086,1110]" italics="true" pageId="5" pageNumber="260">D. batis</emphasis>
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</taxonomicName>
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(
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<figureCitation id="13504EC7FFCBFFCFFDA3FB8BFD2D590E" box="[637,735,1086,1111]" captionStart="FIGURE 4" captionStartId="7.[151,250,1546,1568]" captionText="FIGURE 4. Eggcases of (a) Dipturus batis and (b) Dipturus cf. intermedia." pageId="5" pageNumber="260">Figure 4</figureCitation>
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a) is a similar shape to that of
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<taxonomicName id="4C6B29C1FFCBFFCFFBE7FB8AFB0F590F" box="[1081,1277,1086,1111]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="intermedia">
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<emphasis id="B91F8E50FFCBFFCFFBE7FB8AFBA6590F" box="[1081,1108,1087,1110]" italics="true" pageId="5" pageNumber="260">D.</emphasis>
|
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cf.
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<emphasis id="B91F8E50FFCBFFCFFB5FFB8BFB0F590F" box="[1153,1277,1086,1110]" italics="true" pageId="5" pageNumber="260">intermedia</emphasis>
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</taxonomicName>
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<emphasis id="B91F8E50FFCBFFCFFB23FB8BFAF3590F" box="[1277,1281,1086,1110]" italics="true" pageId="5" pageNumber="260">,</emphasis>
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however it is much smaller, with a mean total eggcase length of 211.9 ± 10.8 (193.0–235.0 mm), mean eggcase length of 139.7 ±
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<quantity id="4C93FFA7FFCBFFCFFF49FB33FF0359C7" box="[151,241,1158,1183]" metricMagnitude="-3" metricUnit="m" metricValue="5.6" pageId="5" pageNumber="260" unit="mm" value="5.6">5.6 mm</quantity>
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(129.0–150.0 mm), and mean eggcase width of 73.8 ±
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<quantity id="4C93FFA7FFCBFFCFFC53FB33FC1559C7" box="[909,999,1158,1183]" metricMagnitude="-3" metricUnit="m" metricValue="3.6" pageId="5" pageNumber="260" unit="mm" value="3.6">3.6 mm</quantity>
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(68.0–80.0 mm). Although only two historical specimens were examined, these were similar to the sizes recorded in contemporary samples. The capsule is convex on the dorsal side and flattened on the ventral side. Both surfaces are covered with a dense fibrous layer (which gives a bark-like appearance) with visible longitudinal striations (
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<figureCitation id="13504EC7FFCBFFCFFBBAFB47FB365852" box="[1124,1220,1266,1291]" captionStart="FIGURE 3" captionStartId="6.[151,250,1061,1083]" captionTargetBox="[328,1256,306,1035]" captionTargetId="figure@6.[325,1262,301,1040]" captionTargetPageId="6" captionText="FIGURE 3. Eggcase capsule surface structures for (a) Amblyraja radiata (b) Dipturus batis (c) Raja clavata (d) Rostroraja alba (taken with USB Digital Microscope)." httpUri="https://zenodo.org/record/272104/files/figure.png" pageId="5" pageNumber="260">Figure 3</figureCitation>
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b), and the eggcase is pale brown in colour. Thin attachment fibres are often present on the margins. Keels are present but not always pronounced. Where the two sides meet at the margin, a slight groove is formed which runs the length of the capsule and fuses at the base of the horns on either end. Both the anterior and posterior aprons are broad and welldeveloped. The anterior horns protrude from the apron and curve in towards each other; they are relatively short in comparison to the eggcase length. Where the posterior horns protrude beyond the apron, they are short and stocky, curving inwards to form hooks.
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</paragraph>
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</subSubSection>
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<subSubSection id="C37101C9FFCBFFCCFF19FA5BFA645DAE" lastPageId="6" lastPageNumber="261" pageId="5" pageNumber="260" type="discussion">
|
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<paragraph id="8BD45242FFCBFFCFFF19FA5BFBD75A7E" blockId="5.[151,1437,762,2011]" pageId="5" pageNumber="260">
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<emphasis id="B91F8E50FFCBFFCFFF19FA5BFEC95B5E" bold="true" box="[199,315,1518,1543]" pageId="5" pageNumber="260">Remarks.</emphasis>
|
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Much of the earlier data for ‘common skate’ referred to what is now known to be a complex of two species.
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<bibRefCitation id="EFFA2FB3FFCBFFCFFF27F9A7FE195B72" box="[249,491,1554,1579]" pageId="5" pageNumber="260" refString="Iglesias, S. P., Toulhohoat, L. & Sellos, D. Y. (2010) Taxonomic confusion and market mislabelling of threatened skates: important consequences for their conservation status. Aquatic Conservation: Marine and Freshwater Ecosystems, 20, 319 - 333. http: // dx. doi. org / 10.1002 / aqc. 1083" type="journal article">
|
||
Iglésias
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<emphasis id="B91F8E50FFCBFFCFFE87F9A6FE665B72" box="[345,404,1555,1579]" italics="true" pageId="5" pageNumber="260">et al.</emphasis>
|
||
(2010)
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||
</bibRefCitation>
|
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, who distinguished these species on the basis of differences in their morphology, genetics and life history, referred to the two species as blue skate
|
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<taxonomicName id="4C6B29C1FFCBFFCFFC1EF982FB825B17" box="[960,1136,1590,1615]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="flossada">
|
||
<emphasis id="B91F8E50FFCBFFCFFC1EF982FC2E5B17" box="[960,988,1591,1614]" italics="true" pageId="5" pageNumber="260">D.</emphasis>
|
||
cf.
|
||
<emphasis id="B91F8E50FFCBFFCFFBCDF983FB825B17" box="[1043,1136,1590,1614]" italics="true" pageId="5" pageNumber="260">flossada</emphasis>
|
||
</taxonomicName>
|
||
and flapper skate
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFA88F982FEE25B2A" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="intermedia">
|
||
<emphasis id="B91F8E50FFCBFFCFFA88F982FA805B17" box="[1366,1394,1591,1614]" italics="true" pageId="5" pageNumber="260">D.</emphasis>
|
||
cf.
|
||
<emphasis id="B91F8E50FFCBFFCFFF49F9EEFEE25B2A" box="[151,272,1627,1651]" italics="true" pageId="5" pageNumber="260">intermedia</emphasis>
|
||
</taxonomicName>
|
||
. However, the scientific name
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFDA9F9EEFD205B2A" box="[631,722,1627,1651]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">
|
||
<emphasis id="B91F8E50FFCBFFCFFDA9F9EEFD205B2A" box="[631,722,1627,1651]" italics="true" pageId="5" pageNumber="260">D. batis</emphasis>
|
||
</taxonomicName>
|
||
is retained here for the former species. Based on the size and morphology, the eggcases described by
|
||
<bibRefCitation id="EFFA2FB3FFCBFFCFFDB4F9CBFD0F5BCE" author="Clark" box="[618,765,1662,1687]" pageId="5" pageNumber="260" refString="Clark, R. S. (1922) Rays and Skates (Raiae) No. I: Egg capsules and young. Journal of the Marine Biological Association of the United Kingdom, 12, 577 - 643. http: // dx. doi. org / 10.1017 / S 002531540000967 X" type="journal article" year="1922">Clark (1922)</bibRefCitation>
|
||
and
|
||
<bibRefCitation id="EFFA2FB3FFCBFFCFFCE2F9CAFC4E5BCE" author="Bor" box="[828,956,1663,1687]" pageId="5" pageNumber="260" refString="Bor, P. (1998) Eikapsels van haaien en roggen. Wetenschappelijke Mededeling Koninklijke Nederlandse Natuurhistorische Vereniging, No. 223, 48 pp." type="book" year="1998">Bor (1998)</bibRefCitation>
|
||
refer to
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFBF6F9CAFB765BCF" box="[1064,1156,1662,1686]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="batis">
|
||
<emphasis id="B91F8E50FFCBFFCFFBF6F9CAFB765BCF" box="[1064,1156,1662,1686]" italics="true" pageId="5" pageNumber="260">D. batis</emphasis>
|
||
</taxonomicName>
|
||
, the smaller of the two species. Six specimens examined by
|
||
<bibRefCitation id="EFFA2FB3FFCBFFCFFD99F917FD285BE2" author="Clark" box="[583,730,1698,1723]" pageId="5" pageNumber="260" refString="Clark, R. S. (1922) Rays and Skates (Raiae) No. I: Egg capsules and young. Journal of the Marine Biological Association of the United Kingdom, 12, 577 - 643. http: // dx. doi. org / 10.1017 / S 002531540000967 X" type="journal article" year="1922">Clark (1922)</bibRefCitation>
|
||
were secured from the adult fish and originated from North Shields (North Sea coast) fish quay, with two additional specimens from
|
||
<collectingRegion id="49AF9CA0FFCBFFCFFC0CF973FBCD5B86" box="[978,1087,1734,1759]" country="United Kingdom" name="Plymouth" pageId="5" pageNumber="260">Plymouth</collectingRegion>
|
||
(
|
||
<collectingRegion id="49AF9CA0FFCBFFCFFB90F972FB6E5B86" box="[1102,1180,1735,1759]" country="United Kingdom" name="Devon" pageId="5" pageNumber="260">Devon</collectingRegion>
|
||
) also described. In the Northeast Atlantic, the eggcases are deposited during spring and summer months (
|
||
<bibRefCitation id="EFFA2FB3FFCBFFCFFB8EF95FFB285A5A" author="Clark" box="[1104,1242,1770,1795]" pageId="5" pageNumber="260" refString="Clark, R. S. (1922) Rays and Skates (Raiae) No. I: Egg capsules and young. Journal of the Marine Biological Association of the United Kingdom, 12, 577 - 643. http: // dx. doi. org / 10.1017 / S 002531540000967 X" type="journal article" year="1922">Clark, 1922</bibRefCitation>
|
||
) but no accurate information has been published regarding the developmental time of this species.
|
||
</paragraph>
|
||
<paragraph id="8BD45242FFCBFFCCFF19F887FA645DAE" blockId="5.[151,1437,762,2011]" lastBlockId="6.[151,1437,151,248]" lastPageId="6" lastPageNumber="261" pageId="5" pageNumber="260">
|
||
The taxonomy of the genus
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFDD3F886FD835A13" box="[525,625,1843,1866]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="genus">
|
||
<emphasis id="B91F8E50FFCBFFCFFDD3F886FD835A13" box="[525,625,1843,1866]" italics="true" pageId="5" pageNumber="260">Dipturus</emphasis>
|
||
</taxonomicName>
|
||
remains unclear, and whilst the long-nosed skate
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFB6AF886FEA55A36" authority="Linnaeus, 1758" authorityName="Linnaeus" authorityYear="1758" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="oxyrinchus">
|
||
<emphasis id="B91F8E50FFCBFFCFFB6AF886FA6E5A12" box="[1204,1436,1843,1867]" italics="true" pageId="5" pageNumber="260">Dipturus oxyrinchus</emphasis>
|
||
(Linnaeus, 1758)
|
||
</taxonomicName>
|
||
and the Norwegian skate
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFD5EF8E2FC2F5A36" authority="Storm, 1881" authorityName="Storm" authorityYear="1881" box="[640,989,1878,1903]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="nidarosiensis">
|
||
<emphasis id="B91F8E50FFCBFFCFFD5EF8E2FCC55A37" box="[640,823,1878,1902]" italics="true" pageId="5" pageNumber="260">D. nidarosiensis</emphasis>
|
||
(Storm, 1881)
|
||
</taxonomicName>
|
||
may also occur in the deeper waters of the British Isles, descriptions of, and material for, authenticated eggcases remain limited. Images of three eggcases attributed to
|
||
<taxonomicName id="4C6B29C1FFCBFFCFFEFBF82AFE315AEF" box="[293,451,1950,1974]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="5" pageNumber="260" phylum="Chordata" rank="species" species="oxyrinchus">
|
||
<emphasis id="B91F8E50FFCBFFCFFEFBF82AFE315AEF" box="[293,451,1950,1974]" italics="true" pageId="5" pageNumber="260">D. oxyrinchus</emphasis>
|
||
</taxonomicName>
|
||
were provided by A. Bellodi (University of Cagliari,
|
||
<collectingCountry id="F37C12D2FFCBFFCFFBC2F82BFBA15AEE" box="[1052,1107,1950,1975]" name="Italy" pageId="5" pageNumber="260">Italy</collectingCountry>
|
||
), and the average dimensions for these specimens were as follows: total eggcase length =
|
||
<quantity id="4C93FFA7FFCBFFCFFCEEF876FC7C5A83" box="[816,910,1987,2011]" metricMagnitude="-1" metricUnit="m" metricValue="1.42" pageId="5" pageNumber="260" unit="mm" value="142.0">142 mm</quantity>
|
||
, eggcase length =
|
||
<quantity id="4C93FFA7FFCBFFCFFB85F876FB4A5A83" box="[1115,1208,1987,2011]" metricMagnitude="-1" metricUnit="m" metricValue="1.1099999999999999" pageId="5" pageNumber="260" unit="mm" value="111.0">111 mm</quantity>
|
||
, capsule length =
|
||
<quantity id="4C93FFA7FFCBFFCCFA5EF876FF375DF6" lastPageId="6" lastPageNumber="261" metricMagnitude="-2" metricUnit="m" metricValue="7.1" pageId="5" pageNumber="260" unit="mm" value="71.0">71 mm</quantity>
|
||
, greatest eggcase width =
|
||
<quantity id="4C93FFA7FFC8FFCCFE26FF22FDBB5DF6" box="[504,585,151,176]" metricMagnitude="-2" metricUnit="m" metricValue="6.1" pageId="6" pageNumber="261" unit="mm" value="61.0">61 mm</quantity>
|
||
and capsule width =
|
||
<quantity id="4C93FFA7FFC8FFCCFC9AFF22FC6A5DF6" box="[836,920,151,176]" metricMagnitude="-2" metricUnit="m" metricValue="5.4" pageId="6" pageNumber="261" unit="mm" value="54.0">54 mm</quantity>
|
||
. One museum specimen of an eggcase taken from the oviduct and labelled as
|
||
<taxonomicName id="4C6B29C1FFC8FFCCFDDAFF08FD535D8D" box="[516,673,188,212]" class="Elasmobranchii" family="Rajidae" genus="Dipturus" kingdom="Animalia" order="Rajiformes" pageId="6" pageNumber="261" phylum="Chordata" rank="species" species="oxyrinchus">
|
||
<emphasis id="B91F8E50FFC8FFCCFDDAFF08FD535D8D" box="[516,673,188,212]" italics="true" pageId="6" pageNumber="261">D. oxyrinchus</emphasis>
|
||
</taxonomicName>
|
||
(BMNH 1952.2.18.4) from Porcupine Bank, southwest
|
||
<collectingCountry id="F37C12D2FFC8FFCCFAC9FF09FA9B5D8C" box="[1303,1385,188,213]" name="Ireland" pageId="6" pageNumber="261">Ireland</collectingCountry>
|
||
, had a total eggcase length of
|
||
<quantity id="4C93FFA7FFC8FFCCFE73FF6AFDFE5DAE" box="[429,524,223,248]" metricMagnitude="-1" metricUnit="m" metricValue="1.26" pageId="6" pageNumber="261" unit="mm" value="126.0">126 mm</quantity>
|
||
, capsule length of
|
||
<quantity id="4C93FFA7FFC8FFCCFD02FF55FCDF5DAE" box="[732,813,224,248]" metricMagnitude="-2" metricUnit="m" metricValue="7.9" pageId="6" pageNumber="261" unit="mm" value="79.0">79 mm</quantity>
|
||
, eggcase width of
|
||
<quantity id="4C93FFA7FFC8FFCCFC22FF6AFBB95DAE" box="[1020,1099,223,248]" metricMagnitude="-2" metricUnit="m" metricValue="6.6" pageId="6" pageNumber="261" unit="mm" value="66.0">66 mm</quantity>
|
||
and capsule width of
|
||
<quantity id="4C93FFA7FFC8FFCCFA9EFF6AFA605DAE" box="[1344,1426,223,248]" metricMagnitude="-2" metricUnit="m" metricValue="5.4" pageId="6" pageNumber="261" unit="mm" value="54.0">54 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |