179 lines
20 KiB
XML
179 lines
20 KiB
XML
<document id="650576412FE7CB0DC9B12686208B60ED" ID-DOI="10.11646/zootaxa.3927.1.1" ID-GBIF-Dataset="c9f96009-d3d4-4977-9cd5-6004214d1036" ID-ISSN="1175-5326" ID-Zenodo-Dep="288034" ID-ZooBank="42B56D11-9B18-4FCC-B632-30A46AB0205C" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1461008886271" checkinUser="plazi" docAuthor="Koppka, Jens" docDate="2015" docId="039087D7C017462FFF68F8E8FA7A3713" docLanguage="en" docName="zt03927p117.pdf" docOrigin="Zootaxa 3927 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Circunula Koppka, 2015, new genus" docType="treatment" docUuid="E502D251-D402-446E-A9AB-E60888911559" docUuidSource="ZooBank" docVersion="8" lastPageNumber="16" masterDocId="FFA9FFAFC0194620FFFFFFC3FFF33303" masterDocTitle="Revision of the Bivalvia from the Upper Jurassic Reuchenette Formation, Northwest Switzerland — Ostreoidea" masterLastPageNumber="117" masterPageNumber="1" pageNumber="15" updateTime="1698566318747" updateUser="plazi">
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<mods:titleInfo id="F9DD38737603E1663FFC67985D9A99DC">
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<mods:title id="656C58BF549108419682D2BF77DE9B7A">Revision of the Bivalvia from the Upper Jurassic Reuchenette Formation, Northwest Switzerland — Ostreoidea</mods:title>
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<mods:name id="5F09E9EF663C9141CEAD81923411D4FC" type="personal">
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<mods:namePart id="AD29FF994FD9075DC794DC97A12B9029">Koppka, Jens</mods:namePart>
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<mods:title id="AAEAC5D204C60E11A8615ECC57E7BC87">Zootaxa</mods:title>
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<mods:part id="3BD39D891FC2EED0FB914F9A179B9505">
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<mods:date id="667D16DE2FBF2C03A12193D2EB7C1BE6">2015</mods:date>
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<mods:detail id="F12A1F4B2EDD33DE8EB01303A861361D" type="volume">
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<mods:number id="E7E6FCE49F5BC1EA3A9C8BD9EC695C1A">3927</mods:number>
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<mods:classification id="D5AFC11342F4416D555E5D63FFCA8DB6">journal article</mods:classification>
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<mods:identifier id="14B91A8611E7569D9C898236A8C5D02D" type="DOI">10.11646/zootaxa.3927.1.1</mods:identifier>
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<treatment id="039087D7C017462FFF68F8E8FA7A3713" ID-DOI="http://doi.org/10.5281/zenodo.6102688" ID-GBIF-Taxon="127377103" ID-Zenodo-Dep="6102688" LSID="urn:lsid:zoobank.org:act:E502D251-D402-446E-A9AB-E60888911559" httpUri="http://treatment.plazi.org/id/039087D7C017462FFF68F8E8FA7A3713" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15">
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<subSubSection id="C323654AC017462EFF68F8E8FE013446" box="[151,498,1834,1861]" pageId="14" pageNumber="15" type="nomenclature">
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<paragraph id="8B8636C1C017462EFF68F8E8FE013446" blockId="14.[151,498,1834,1861]" box="[151,498,1834,1861]" pageId="14" pageNumber="15">
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<heading id="D0CE81ADC017462EFF68F8E8FE013446" bold="true" box="[151,498,1834,1861]" fontSize="11" level="1" pageId="14" pageNumber="15" reason="1">
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<emphasis id="B94DEAD3C017462EFF68F8E8FE013446" bold="true" box="[151,498,1834,1861]" pageId="14" pageNumber="15">
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Genus
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<taxonomicName id="4C394D42C017462EFF11F8E9FE993447" box="[238,362,1834,1860]" class="Bivalvia" family="Arctostreidae" genus="Circunula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreida" pageId="14" pageNumber="15" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="B94DEAD3C017462EFF11F8E9FE993447" bold="true" box="[238,362,1834,1860]" italics="true" pageId="14" pageNumber="15">Circunula</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A27E57A8C017462EFE8EF8E8FE013446" box="[369,498,1835,1861]" pageId="14" pageNumber="15" rank="genus">new genus</taxonomicNameLabel>
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C323654AC017462EFF68F8B2FED634AD" pageId="14" pageNumber="15" type="materials_examined">
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<paragraph id="8B8636C1C017462EFF68F8B2FED634AD" blockId="14.[151,1436,1905,2038]" pageId="14" pageNumber="15">
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<emphasis id="B94DEAD3C017462EFF68F8B2FEDF3489" bold="true" box="[151,300,1905,1930]" pageId="14" pageNumber="15">
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<typeStatus id="54828863C017462EFF68F8B2FF213489" box="[151,210,1905,1930]" pageId="14" pageNumber="15">Type</typeStatus>
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species
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</emphasis>
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.
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<taxonomicName id="4C394D42C017462EFEC5F8B1FD4E3489" authority="Contejean, 1859" authorityName="Contejean" authorityYear="1859" box="[314,701,1905,1930]" class="Bivalvia" family="Ostreidae" genus="Ostrea" kingdom="Animalia" order="Ostreoida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="cotyledon">
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<emphasis id="B94DEAD3C017462EFEC5F8B1FE093489" box="[314,506,1905,1930]" italics="true" pageId="14" pageNumber="15">Ostrea cotyledon</emphasis>
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<bibRefCitation id="EFA84B30C017462EFDFEF8B2FD4E3489" author="Contejean" box="[513,701,1905,1930]" pageId="14" pageNumber="15" refString="Contejean, C. H. (1859) Etude de l'etage Kimmeridien dans les environs de Montbeliard et dans le Jura, la France et l'Angleterre. Memoires de la Societe d'Emulation du Doubs, Year 1858, 1 - 352." type="journal article" year="1859">Contejean, 1859</bibRefCitation>
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</taxonomicName>
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;
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<typeStatus id="54828863C017462EFD36F8B2FCC33489" box="[713,816,1905,1930]" pageId="14" pageNumber="15" type="lectotype">lectotype</typeStatus>
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(see under species); Lower Kimmeridgian,
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<collectingCountry id="F32E7651C017462EFADFF8B1FA9F348A" box="[1312,1388,1906,1929]" name="France" pageId="14" pageNumber="15">France</collectingCountry>
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and
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<collectingCountry id="F32E7651C017462EFF68F856FED234AD" box="[151,289,1941,1966]" name="Switzerland" pageId="14" pageNumber="15">Switzerland</collectingCountry>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C323654AC017462FFF38F87AFF2332F7" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15" type="diagnosis">
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<paragraph id="8B8636C1C017462FFF38F87AFEF7328B" blockId="14.[151,1436,1905,2038]" lastBlockId="15.[151,1437,151,1040]" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15">
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<emphasis id="B94DEAD3C017462EFF38F87AFEC934D1" bold="true" box="[199,314,1977,2002]" pageId="14" pageNumber="15">Diagnosis</emphasis>
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. Strongly inequivalve and thin-shelled. Left valve (LV) weak capacious, with upturned ventral margin, right valve (RV) usually dorsally convex and ventrally concave, margins upturned.
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<taxonomicName id="4C394D42C017462EFB39F81EFAE934F5" box="[1222,1306,2013,2038]" class="Bivalvia" family="Ostreidae" genus="Actinostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="14" pageNumber="69" phylum="Mollusca" rank="species" species="outline">Outline</taxonomicName>
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circular or suborbicular to oval, rarely subquadrate or subtriangular. Attachment area large (almost entire LV). Both valves smooth with fine concentric growth lines, RV with weak antimarginal riblets and occasionally with radial grooves and commarginal pustules. Antimarginal riblets or grooves restricted to attachment area of LV (rarely observable). Left valve lacks umbonal cavity. Posterior adductor scar posterodorsal, round (gryphaeate), deeply inserted. Juveniles with well-developed chomata on dorsal margin, lacking in later growth phases. Ontogenetic change of hinge morphology from triangular-ostreate to prosodetic twisted with a narrow, ventrally projected posterior bourrelet.
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</paragraph>
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<paragraph id="8B8636C1C016462FFF38FE57FF2332F7" blockId="15.[151,1437,151,1040]" pageId="15" pageNumber="16">Microstructure of RV with outer shell layer of slightly reclined prisms, middle shell layer complex crossfoliated and thin low-angle (probably) regularly foliated structures; chambering absent; microstructure of LV not seen.</paragraph>
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</subSubSection>
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<subSubSection id="C323654AC016462FFF38FE3CFC6D313E" pageId="15" pageNumber="16" type="etymology">
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<paragraph id="8B8636C1C016462FFF38FE3CFC6D313E" blockId="15.[151,1437,151,1040]" pageId="15" pageNumber="16">
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<emphasis id="B94DEAD3C016462FFF38FE3CFEB5311B" bold="true" box="[199,326,511,536]" pageId="15" pageNumber="16">Etymology</emphasis>
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. Word combination derived from Latin
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<emphasis id="B94DEAD3C016462FFCF4FE3CFC97311B" box="[779,868,511,536]" italics="true" pageId="15" pageNumber="16">circulus</emphasis>
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(= circle line), because of the characteristic round shape, and affix –
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<emphasis id="B94DEAD3C016462FFEA2FDE7FE66313E" box="[349,405,548,573]" italics="true" pageId="15" pageNumber="16">nula,</emphasis>
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adopted from
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<taxonomicName id="4C394D42C016462FFDC5FDE7FD6F313E" box="[570,668,548,573]" class="Leotiomycetes" family="Pezizellaceae" genus="Catinula" higherTaxonomySource="CoL" kingdom="Fungi" order="Helotiales" pageId="15" pageNumber="16" phylum="Ascomycota" rank="genus">
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<emphasis id="B94DEAD3C016462FFDC5FDE7FD6F313E" box="[570,668,548,573]" italics="true" pageId="15" pageNumber="16">Catinula</emphasis>
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</taxonomicName>
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. The gender is female.
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</paragraph>
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</subSubSection>
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<subSubSection id="C323654AC016462FFF38FD84FA7A3713" pageId="15" pageNumber="16" type="discussion">
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<paragraph id="8B8636C1C016462FFF38FD84FC6F307C" blockId="15.[151,1437,151,1040]" pageId="15" pageNumber="16">
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<emphasis id="B94DEAD3C016462FFF38FD84FEC73163" bold="true" box="[199,308,583,608]" pageId="15" pageNumber="16">Remarks</emphasis>
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. The common oversight, especially in the older literature, of both chomata and coiling preferences of Jurassic oysters during early ontogenetic growth phases hampers comparisons with other taxa and evaluation of their taxon specificity, e.g., flexible coiling may be species-specific. However, none of the morphologically similar Jurassic genera as
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<taxonomicName id="4C394D42C016462FFE91FD76FE3931CF" box="[366,458,693,716]" class="Bivalvia" family="Gryphaeidae" genus="Liostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pterioida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFE91FD76FE3931CF" box="[366,458,693,716]" italics="true" pageId="15" pageNumber="16">Liostrea</emphasis>
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</taxonomicName>
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(Liostreinae, Flemingostreidae),
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<taxonomicName id="4C394D42C016462FFCB8FD77FC5A31CE" box="[839,937,692,717]" class="Leotiomycetes" family="Pezizellaceae" genus="Catinula" higherTaxonomySource="CoL" kingdom="Fungi" order="Helotiales" pageId="15" pageNumber="16" phylum="Ascomycota" rank="genus">
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<emphasis id="B94DEAD3C016462FFCB8FD77FC5A31CE" box="[839,937,692,717]" italics="true" pageId="15" pageNumber="16">Catinula</emphasis>
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</taxonomicName>
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,
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<taxonomicName id="4C394D42C016462FFC45FD77FBCE31CE" box="[954,1085,692,717]" class="Bivalvia" family="Gryphaeidae" genus="Deltoideum" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFC45FD77FBCE31CE" box="[954,1085,692,717]" italics="true" pageId="15" pageNumber="16">Deltoideum</emphasis>
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</taxonomicName>
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and
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<taxonomicName id="4C394D42C016462FFB87FD76FB0731CF" box="[1144,1268,693,716]" class="Bivalvia" family="Gryphaeidae" genus="Pernostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFB87FD76FB0731CF" box="[1144,1268,693,716]" italics="true" pageId="15" pageNumber="16">Pernostrea</emphasis>
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</taxonomicName>
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(
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<taxonomicName id="4C394D42C016462FFAFBFD77FA6B31CE" box="[1284,1432,692,717]" class="Bivalvia" family="Gryphaeidae" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="subFamily" subFamily="Gryphaeinae">Gryphaeinae</taxonomicName>
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,
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<taxonomicName id="4C394D42C016462FFF68FD14FEDB31F3" box="[151,296,727,752]" class="Bivalvia" family="Gryphaeidae" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="family">Gryphaeidae</taxonomicName>
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) develops chomata at any growth stage. This trait is considered generic, therefore, which warrants the separation of
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<taxonomicName id="4C394D42C016462FFED1FD3FFE6C3016" box="[302,415,764,789]" class="Bivalvia" family="Arctostreidae" genus="Circunula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="B94DEAD3C016462FFED1FD3FFE6C3016" box="[302,415,764,789]" italics="true" pageId="15" pageNumber="16">Circunula</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A27E57A8C016462FFE5AFD3FFE003016" box="[421,499,764,789]" pageId="15" pageNumber="16" rank="genus">
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<emphasis id="B94DEAD3C016462FFE5AFD3FFE003016" bold="true" box="[421,499,764,789]" pageId="15" pageNumber="16">n. gen.</emphasis>
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</taxonomicNameLabel>
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from the taxa just mentioned. Furthermore, the other taxa do not share the preferred circular shape of
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<taxonomicName id="4C394D42C016462FFEA1FCDCFE3C303B" box="[350,463,799,824]" class="Bivalvia" family="Arctostreidae" genus="Circunula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreida" pageId="15" pageNumber="112" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="B94DEAD3C016462FFEA1FCDCFE3C303B" box="[350,463,799,824]" italics="true" pageId="15" pageNumber="16">Circunula</emphasis>
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</taxonomicName>
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. For example,
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<taxonomicName id="4C394D42C016462FFD82FCE2FD0A303B" box="[637,761,801,824]" class="Bivalvia" family="Gryphaeidae" genus="Pernostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFD82FCE2FD0A303B" box="[637,761,801,824]" italics="true" pageId="15" pageNumber="16">Pernostrea</emphasis>
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</taxonomicName>
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has a spatulate
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<taxonomicName id="4C394D42C016462FFC4DFCDCFBF0303B" box="[946,1027,799,824]" class="Bivalvia" family="Ostreidae" genus="Actinostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="species" species="outline">outline</taxonomicName>
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,
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<taxonomicName id="4C394D42C016462FFBF0FCDCFB62303B" box="[1039,1169,799,824]" class="Bivalvia" family="Gryphaeidae" genus="Deltoideum" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFBF0FCDCFB62303B" box="[1039,1169,799,824]" italics="true" pageId="15" pageNumber="16">Deltoideum</emphasis>
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</taxonomicName>
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a strong pointed umbo associated with a concave posterodorsal margin, and
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<taxonomicName id="4C394D42C016462FFD17FC86FCB7305F" box="[744,836,837,860]" class="Bivalvia" family="Gryphaeidae" genus="Liostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pterioida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
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<emphasis id="B94DEAD3C016462FFD17FC86FCB7305F" box="[744,836,837,860]" italics="true" pageId="15" pageNumber="16">Liostrea</emphasis>
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</taxonomicName>
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, which is also dorsally pointed, lacks radial riblets on its right valve. For species level comparisons see under
|
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<taxonomicName id="4C394D42C016462FFCF7FCABFC653083" box="[776,918,871,896]" class="Bivalvia" family="Ostreidae" genus="Ostrea" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="species" species="cotyledon">
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<emphasis id="B94DEAD3C016462FFCF7FCABFC653083" box="[776,918,871,896]" italics="true" pageId="15" pageNumber="16">C. cotyledon</emphasis>
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</taxonomicName>
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.
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</paragraph>
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<paragraph id="8B8636C1C016462FFF38FC4FFA7A3713" blockId="15.[151,1437,151,1040]" pageId="15" pageNumber="16">
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The phylogenetic position of the new genus is unclear, however. The presently tentative association with
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<taxonomicName id="4C394D42C016462FFF68FC6CFEB930CB" box="[151,330,943,968]" class="Bivalvia" family="Gryphaeidae" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="subFamily" subFamily="Pycnodonteinae">Pycnodonteinae</taxonomicName>
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is based on phenotypic similarities, including chomata, of
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<taxonomicName id="4C394D42C016462FFC06FC6CFB9930CB" box="[1017,1130,943,968]" class="Bivalvia" family="Arctostreidae" genus="Circunula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="B94DEAD3C016462FFC06FC6CFB9930CB" box="[1017,1130,943,968]" italics="true" pageId="15" pageNumber="16">Circunula</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A27E57A8C016462FFB8CFC6CFB3730CB" box="[1139,1220,943,968]" pageId="15" pageNumber="16" rank="genus">
|
||
<emphasis id="B94DEAD3C016462FFB8CFC6CFB3730CB" bold="true" box="[1139,1220,943,968]" pageId="15" pageNumber="16">n. gen.</emphasis>
|
||
</taxonomicNameLabel>
|
||
and small, largely attached pycnodonteine oysters (
|
||
<emphasis id="B94DEAD3C016462FFDF7FC17FD8630EE" box="[520,629,980,1005]" italics="true" pageId="15" pageNumber="16">Phygraea</emphasis>
|
||
<bibRefCitation id="EFA84B30C016462FFD83FC17FCFD30EE" author="Vialov" box="[636,782,980,1005]" pageId="15" pageNumber="16" refString="Vialov, O. S. 1936 Sur la classification des huitres. Doklady Akademii Nauk SSSR, Serie 2, 4 (1), 17 - 20." type="journal article" year="1936">Vialov, 1936</bibRefCitation>
|
||
, and
|
||
<taxonomicName id="4C394D42C016462FFCB6FC17FBA830EE" authority="Vialov, 1945" authorityName="Vialov" authorityYear="1945" box="[841,1115,980,1005]" class="Bivalvia" family="Gryphaeidae" genus="Labrostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="15" pageNumber="16" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B94DEAD3C016462FFCB6FC17FC3030EE" box="[841,963,980,1005]" italics="true" pageId="15" pageNumber="16">Labrostrea</emphasis>
|
||
Vialov, 1945
|
||
</taxonomicName>
|
||
) from the Upper Cretaceous (
|
||
<bibRefCitation id="EFA84B30C016462FFF61FC34FEC03713" author="Nestler" box="[158,307,1015,1040]" pageId="15" pageNumber="16" refString="Nestler, H. (1965) Entwicklung und Schalenskulptur von Pycnodonte vesicularis (Lam.) und Dimyodon nilssoni (v. Hag.) aus der Oberkreide. Geologie, 14 (1), 64 - 77." type="journal article" year="1965">Nestler 1965</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFA84B30C016462FFEC0FC3BFE273713" author="Cooper" box="[319,468,1016,1040]" pageId="15" pageNumber="16" refString="Cooper, M. R. (1992) Pycnodonteine oysters from the Upper Cretaceous of Zululand. Durban Museum Novitates, 17, 23 - 57." type="journal article" year="1992">Cooper 1992</bibRefCitation>
|
||
). There is presently no evidence of a vesicular shell structure in
|
||
<taxonomicName id="4C394D42C016462FFB5BFC34FAE63713" box="[1188,1301,1015,1040]" class="Bivalvia" family="Arctostreidae" genus="Circunula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreida" pageId="15" pageNumber="112" phylum="Mollusca" rank="genus" status="gen. nov.">
|
||
<emphasis id="B94DEAD3C016462FFB5BFC34FAE63713" box="[1188,1301,1015,1040]" italics="true" pageId="15" pageNumber="16">Circunula</emphasis>
|
||
</taxonomicName>
|
||
, however.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |