395 lines
49 KiB
XML
395 lines
49 KiB
XML
<document id="1D18E0EFEBCE93CA0FD3ECA4F569336A" ID-CLB-Dataset="4900" ID-DOI="10.11646/zootaxa.3859.1.1" ID-GBIF-Dataset="d866af6f-cbcd-47f4-a4f3-1499c1789ae3" ID-ISSN="1175-5326" ID-Zenodo-Dep="4930112" ID-ZooBank="24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1623442093486" checkinUser="felipe" docAuthor="Hryniewicz, Krzysztof, Little, Crispin T. S. & Nakrem, Hans Arne" docDate="2014" docId="A2311D4D9F0BE33004E6FD6FFD332BEB" docLanguage="en" docName="zt03859p066.pdf" docOrigin="Zootaxa 3859 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Mesosaccella toddi Hryniewicz & Little & Nakrem 2014, sp. nov." docType="treatment" docVersion="12" lastPageNumber="22" masterDocId="5E0865359F19E3250471FFA5FFA82955" masterDocTitle="Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard" masterLastPageNumber="66" masterPageNumber="1" pageNumber="19" updateTime="1699013068164" updateUser="ExternalLinkService">
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<mods:mods id="C41FCC55FAD07C0B6B319C55C133C230" xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo id="847370A0DE0802F2B52D5A2A7EC39208">
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<mods:title id="EE444BA32460EB7815320E3E96208780">Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard</mods:title>
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<mods:name id="01366868F5D23148D0336CB15F205FE7" type="personal">
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<mods:roleTerm id="1FBDACFC1EDAC436DAE893B7B499D7D3">Author</mods:roleTerm>
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<mods:namePart id="4F62A81BDF954BAC65740C8857A6ECA5">Hryniewicz, Krzysztof</mods:namePart>
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<mods:nameIdentifier id="E16149A0071D1E198CD862BA523DBB8C" type="email">krzysztof.hryniewicz@nhm.uio.no</mods:nameIdentifier>
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<mods:name id="92B890A1AA473982721A8EFD080478CB" type="personal">
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<mods:roleTerm id="B432D80E8240681B9585C3D497E23F9C">Author</mods:roleTerm>
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<mods:namePart id="DC721BE46F689954F5A08036B66A1A8B">Little, Crispin T. S.</mods:namePart>
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<mods:nameIdentifier id="A1AB21C4A53E6F267F0144585083AE11" type="email">earctsl@leeds.ac.uk</mods:nameIdentifier>
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<mods:roleTerm id="1643230FFB53C2C86C5D523E608036C9">Author</mods:roleTerm>
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<mods:namePart id="22B4A90B9D20B56AAE23E1F3DDEA702D">Nakrem, Hans Arne</mods:namePart>
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<mods:nameIdentifier id="0DC6A53909A73275A91B16941B026B03" type="email">krzysztof.hryniewicz@nhm.uio.no</mods:nameIdentifier>
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<mods:typeOfResource id="6576EBF70CE7E3D27880854341A7ADAD">text</mods:typeOfResource>
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<mods:title id="071A0656BCB116ED5226A7F203707FE2">Zootaxa</mods:title>
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<mods:part id="65B74156B0B1022B62CF2F764173A7CF">
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<mods:date id="753A8464BC2036193B2BAD492C7800CA">2014</mods:date>
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<mods:number id="49880D9F40F319B909AD8FBAF8432C04">2014-09-02</mods:number>
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<mods:number id="02A45DA51CE86B0F77D0EA5874A842DF">3859</mods:number>
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<mods:number id="8E7C8916A905BC41D713A5269DCA1FF9">1</mods:number>
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<mods:identifier id="8934ECBAB2366F58122B52EAFBCDDA7A" type="DOI">10.11646/zootaxa.3859.1.1</mods:identifier>
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<treatment id="A2311D4D9F0BE33004E6FD6FFD332BEB" ID-DOI="http://doi.org/10.5281/zenodo.5228241" ID-GBIF-Taxon="184646049" ID-Zenodo-Dep="5228241" LSID="urn:lsid:plazi:treatment:A2311D4D9F0BE33004E6FD6FFD332BEB" httpUri="http://treatment.plazi.org/id/A2311D4D9F0BE33004E6FD6FFD332BEB" lastPageId="21" lastPageNumber="22" pageId="18" pageNumber="19">
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<subSubSection id="6282FFD09F0BE33704E6FD6FFE482BB1" box="[151,480,714,740]" pageId="18" pageNumber="19" type="nomenclature">
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<paragraph id="2A27AC5B9F0BE33704E6FD6FFE482BB1" blockId="18.[151,480,714,774]" box="[151,480,714,740]" pageId="18" pageNumber="19">
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<heading id="716F1B379F0BE33704E6FD6FFE482BB1" bold="true" box="[151,480,714,740]" fontSize="11" level="2" pageId="18" pageNumber="19" reason="4">
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<emphasis id="18EC70499F0BE33704E6FD6FFE482BB1" bold="true" box="[151,480,714,740]" pageId="18" pageNumber="19">
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<taxonomicName id="ED98D7D89F0BE33704E6FD6FFED32BB1" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[151,379,714,740]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="18" pageNumber="19" phylum="Mollusca" rank="species" species="toddi" status="sp. nov.">
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<emphasis id="18EC70499F0BE33704E6FD6FFED32BB1" bold="true" box="[151,379,714,740]" italics="true" pageId="18" pageNumber="19">Mesosaccella toddi</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="03DFCD329F0BE33705F2FD6FFE482BB1" box="[387,480,714,740]" pageId="18" pageNumber="19" rank="species">sp. nov.</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="6282FFD09F0BE33704E6FD48FDF02A11" pageId="18" pageNumber="19" type="description">
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<paragraph id="2A27AC5B9F0BE33704E6FD48FEE92A53" blockId="18.[151,480,714,774]" box="[151,321,749,774]" pageId="18" pageNumber="19">
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(
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<figureCitation id="B2A3B0DE9F0BE33704EFFD48FE912A53" box="[158,313,749,774]" captionStart="FIGURE 7" captionStartId="18.[151,250,1518,1540]" captionTargetId="figure-22@17.[168,1425,193,1978]" captionTargetPageId="17" captionText="FIGURE 7. (A–F) Mesosaccella rogovi sp. nov. (A–B) Lateral view of a internal mould showing pallial line. Fragment of the shell shows concentric growth lines. (C) Dorsal view of specimen with partially preserved shell showing weak carina, escutcheon, unidentified muscle scars and ridges formed by growth line deflections. (D–E) Lateral view of right valve internal mould showing weak posterior adductor muscle scar and weak pallial line with very shallow pallial sinus. (F) Internal view of the right valve showing anterior and posterior dental rows and cardinal dentition. (G–P) Mesosaccella toddi sp. nov. (G–K) Left valve lateral views of articulated specimens. (J) Details of external ornament showing characteristic commarginal ridges and rosette-shaped ornament in interridge spaces (arrowed). (K) Holotype showing strong posterior carinae. (L–M) Anterior and posterior views of holotype. Note three carinae and escutcheon visible in the posterior view. (N) Dorsal view of holotype showing three carinae and their relation to wide and shallow escutcheon. (O) Internal view of the dorsal margin of articulated specimen showing cardinal-most teeth and unidentified muscle scars. (P) Lateral view of right valve internal mould showing relatively strong, circular anterior adductor muscle scar and elongated posterior adductor muscle scar, as well as strong pallial line with shallow pallial sinus. (A–E) PMO 217.371, (F) PMO 217.539, (G) PMO 217.609, (H) PMO 217.610, (I–J) PMO 217.616, (K–N) PMO 224.861, (O) PMO 225.031, (P) PMO 224.862. Scale bars 5 mm (A–F, K–P), 2 mm (G–I)." figureDoi="http://doi.org/10.5281/zenodo.5228095" httpUri="https://zenodo.org/record/5228095/files/figure.png" pageId="18" pageNumber="19">Figure 7 G–P</figureCitation>
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)
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</paragraph>
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<paragraph id="2A27AC5B9F0BE33704E6FC8BFDF02A11" blockId="18.[151,600,814,836]" box="[151,600,814,836]" pageId="18" pageNumber="19">
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2011 Malletiid sp. 2—Hammer
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<emphasis id="18EC70499F0BE33705ABFC8AFDAF2A11" box="[474,519,814,836]" italics="true" pageId="18" pageNumber="19">et al</emphasis>
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., tab. 2.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F0BE33704E6FCCFFA832AF3" pageId="18" pageNumber="19" type="etymology">
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<paragraph id="2A27AC5B9F0BE33704E6FCCFFA832AF3" blockId="18.[151,1436,874,1439]" pageId="18" pageNumber="19">
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<emphasis id="18EC70499F0BE33704E6FCCFFEB62AD6" bold="true" box="[151,286,874,899]" pageId="18" pageNumber="19">Etymology.</emphasis>
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After Jonathan A. Todd, curator of the Mesozoic and Cenozoic mollusc collection in the Natural History Museum, London. Study of this collection helped the work on the fossils described in this paper.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F0BE33704B4FC17FEF32D92" pageId="18" pageNumber="19" type="materials_examined">
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<paragraph id="2A27AC5B9F0BE33704B4FC17FBFB2A9E" blockId="18.[151,1436,874,1439]" box="[197,1107,946,971]" pageId="18" pageNumber="19">
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<emphasis id="18EC70499F0BE33704B4FC17FECB2A9E" bold="true" box="[197,355,946,971]" pageId="18" pageNumber="19">
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<typeStatus id="F52312F99F0BE33704B4FC17FEA82A9E" box="[197,256,946,971]" pageId="18" pageNumber="19">Type</typeStatus>
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locality.
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</emphasis>
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Seep 9, Knorringfjellet, Spitsbergen,
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<geoCoordinate id="4FACCA9C9F0BE337077AFC17FC012A9E" box="[779,937,946,971]" degrees="78" direction="north" minutes="18" orientation="latitude" pageId="18" pageNumber="19" precision="1" seconds="49.9" value="78.313866">78°18’49.9”N</geoCoordinate>
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<geoCoordinate id="4FACCA9C9F0BE33707C1FC17FBE72A9E" box="[944,1103,946,971]" degrees="16" direction="east" minutes="10" orientation="longitude" pageId="18" pageNumber="19" precision="1" seconds="58.9" value="16.183027">16°10’58.9”E</geoCoordinate>
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.
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</paragraph>
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<paragraph id="2A27AC5B9F0BE33704B4FC73FD742D2B" blockId="18.[151,1436,874,1439]" pageId="18" pageNumber="19">
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<emphasis id="18EC70499F0BE33704B4FC73FEDD2ABA" bold="true" box="[197,373,982,1007]" pageId="18" pageNumber="19">Type material.</emphasis>
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<materialsCitation id="9AF0A6069F0BE337050FFC73FC072ABA" ID-GBIF-Occurrence="3336546322" box="[382,943,982,1007]" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 224.861" specimenCount="1" typeStatus="holotype">
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<typeStatus id="F52312F99F0BE337050FFC73FE432ABA" box="[382,491,982,1007]" pageId="18" pageNumber="19" type="holotype">Holotype</typeStatus>
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:
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<specimenCode id="7A3E04209F0BE3370586FC73FD332ABA" box="[503,667,982,1007]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 224.861</specimenCode>
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; a large, complete shell
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</materialsCitation>
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.
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<materialsCitation id="9AF0A6069F0BE33707CDFC72FDD32D46" ID-GBIF-Occurrence="3336546329" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 225.031" specimenCount="1" typeStatus="paratype">
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<typeStatus id="F52312F99F0BE33707CDFC72FB852ABA" box="[956,1069,983,1007]" pageId="18" pageNumber="19" type="paratype">Paratypes</typeStatus>
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:
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<specimenCode id="7A3E04209F0BE337004BFC73FB732ABA" box="[1082,1243,982,1007]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 225.031</specimenCode>
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Fragment of the cardinal area showing taxodont dentition
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</materialsCitation>
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.
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<materialsCitation id="9AF0A6069F0BE33706FAFC5FFB212D62" ID-GBIF-Occurrence="3336546309" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 224.862" specimenCount="1" typeStatus="paratype">
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<specimenCode id="7A3E04209F0BE33706FAFC5FFC9B2D46" box="[651,819,1018,1043]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 224.862</specimenCode>
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; an internal mould showing weak anterior adductor muscle scar and posterior adductor muscle scar and pallial line with shallow pallial sinus
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</materialsCitation>
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.
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<materialsCitation id="9AF0A6069F0BE33700E4FBBBFEEA2D0E" ID-GBIF-Occurrence="3336546302" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 217.609" specimenCount="1" typeStatus="paratype">
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<specimenCode id="7A3E04209F0BE33700E4FBBBFA902D62" box="[1173,1336,1054,1079]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 217.609</specimenCode>
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; a small, complete shell
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</materialsCitation>
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.
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<materialsCitation id="9AF0A6069F0BE3370523FBE7FCB42D0E" ID-GBIF-Occurrence="3336546306" box="[338,796,1090,1115]" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 217.610" specimenCount="1" typeStatus="paratype">
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<specimenCode id="7A3E04209F0BE3370523FBE7FE512D0E" box="[338,505,1090,1115]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 217.610</specimenCode>
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; a small, complete shell
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</materialsCitation>
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.
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<materialsCitation id="9AF0A6069F0BE337075DFBE7FD702D2B" ID-GBIF-Occurrence="3336546326" collectionCode="PMO" pageId="18" pageNumber="19" specimenCode="PMO 217.616" specimenCount="1" typeStatus="paratype">
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<specimenCode id="7A3E04209F0BE337075DFBE7FC7C2D0E" box="[812,980,1090,1115]" collectionCode="PMO" pageId="18" pageNumber="19">PMO 217.616</specimenCode>
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; a large, well preserved shell showing external commarginal and rosette-shaped ornament
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="2A27AC5B9F0BE33704B4FB2FFEF32D92" blockId="18.[151,1436,874,1439]" pageId="18" pageNumber="19">
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||
<emphasis id="18EC70499F0BE33704B4FB2FFE072DF6" bold="true" box="[197,431,1162,1187]" pageId="18" pageNumber="19">Material examined.</emphasis>
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<specimenCount id="3C9E67D29F0BE33705C7FB2FFDF82DF6" box="[438,592,1162,1187]" pageId="18" pageNumber="19" type="generic">35 specimens</specimenCount>
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, articulated valves and internal or external moulds. See Appendix 1 for the list of specimens.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F0BE33704B4FB77FCA42C02" pageId="18" pageNumber="19" type="diagnosis">
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<paragraph id="2A27AC5B9F0BE33704B4FB77FCA42C02" blockId="18.[151,1436,874,1439]" pageId="18" pageNumber="19">
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<emphasis id="18EC70499F0BE33704B4FB77FE972DBE" bold="true" box="[197,319,1234,1259]" pageId="18" pageNumber="19">Diagnosis.</emphasis>
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Inflated and thick-shelled with posterior part approximately twice the length of the anterior part, and with three strong posterior carinae. External ornament of strong commarginal ridges fading towards posterior and anterior and crossed obliquely by commarginal growth lines. Interridge spaces occupied by rows of rosetteshaped ornamentation, fading anteriorly and posteriorly.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F0BE33104B4FAC7FF5C2885" lastPageId="20" lastPageNumber="21" pageId="18" pageNumber="19" type="description">
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<paragraph id="2A27AC5B9F0BE33704B4FAC7FE9D2CCA" blockId="18.[151,1436,874,1439]" pageId="18" pageNumber="19">
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<emphasis id="18EC70499F0BE33704B4FAC7FEE72C2E" bold="true" box="[197,335,1378,1403]" pageId="18" pageNumber="19">Dimensions</emphasis>
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.
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<quantity id="ED6001BE9F0BE337052CFAC7FE762C2F" box="[349,478,1378,1403]" metricMagnitude="-3" metricUnit="m" metricValue="9.25" metricValueMax="12.5" metricValueMin="6.0" pageId="18" pageNumber="19" unit="mm" value="9.25" valueMax="12.5" valueMin="6.0">6–12.5 mm</quantity>
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in length,
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<quantity id="ED6001BE9F0BE3370629FAC7FD622C2F" box="[600,714,1378,1403]" metricMagnitude="-3" metricUnit="m" metricValue="6.1" metricValueMax="8.2" metricValueMin="4.0" pageId="18" pageNumber="19" unit="mm" value="6.1" valueMax="8.2" valueMin="4.0">4–8.2 mm</quantity>
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in height,
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<quantity id="ED6001BE9F0BE3370735FAC7FC1D2C2F" box="[836,949,1378,1403]" metricMagnitude="-3" metricUnit="m" metricValue="5.05" metricValueMax="7.1" metricValueMin="3.0" pageId="18" pageNumber="19" unit="mm" value="5.05" valueMax="7.1" valueMin="3.0">3–7.1 mm</quantity>
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in width. See
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<figureCitation id="B2A3B0DE9F0BE3370028FAC7FB5D2C2E" box="[1113,1269,1378,1403]" captionStart="FIGURE 9" captionStartId="20.[151,250,1614,1636]" captionTargetBox="[198,1392,509,1599]" captionTargetId="figure-363@20.[197,1392,508,1600]" captionTargetPageId="20" captionText="FIGURE 9. Measurements of Mesosaccella toddi sp. nov. (in mm). (A) Height to length. (B) Width to length. (C) Width to height. (D) Posterior length to length." figureDoi="http://doi.org/10.5281/zenodo.4930126" httpUri="https://zenodo.org/record/4930126/files/figure.png" pageId="18" pageNumber="19">Figure 9 A–D</figureCitation>
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and Appendix 2E for details.
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</paragraph>
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<caption id="7EE7FCD39F0BE33704E6FA4BFAB92E21" ID-DOI="http://doi.org/10.5281/zenodo.5228095" ID-Zenodo-Dep="5228095" httpUri="https://zenodo.org/record/5228095/files/figure.png" pageId="18" pageNumber="19" startId="18.[151,250,1518,1540]" targetBox="[169,1424,194,1977]" targetPageId="17">
|
||
<paragraph id="2A27AC5B9F0BE33704E6FA4BFAB92E21" blockId="18.[151,1436,1518,1908]" pageId="18" pageNumber="19">
|
||
<emphasis id="18EC70499F0BE33704E6FA4BFEBB2F51" bold="true" box="[151,275,1518,1540]" pageId="18" pageNumber="19">FIGURE 7.</emphasis>
|
||
(A–F)
|
||
<taxonomicName id="ED98D7D89F0BE337052FFA4BFD982F51" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[350,560,1518,1540]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="18" pageNumber="19" phylum="Mollusca" rank="species" species="rogovi" status="sp. nov.">
|
||
<emphasis id="18EC70499F0BE337052FFA4BFD982F51" box="[350,560,1518,1540]" italics="true" pageId="18" pageNumber="19">Mesosaccella rogovi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0BE3370647FA4BFD2F2F51" bold="true" box="[566,647,1518,1540]" pageId="18" pageNumber="19">
|
||
<taxonomicNameLabel id="03DFCD329F0BE3370647FA4BFD2F2F51" box="[566,647,1518,1540]" pageId="18" pageNumber="19" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(A–B) Lateral view of a internal mould showing pallial line. Fragment of the shell shows concentric growth lines. (C) Dorsal view of specimen with partially preserved shell showing weak carina, escutcheon, unidentified muscle scars and ridges formed by growth line deflections. (D–E) Lateral view of right valve internal mould showing weak posterior adductor muscle scar and weak pallial line with very shallow pallial sinus. (F) Internal view of the right valve showing anterior and posterior dental rows and cardinal dentition. (G–P)
|
||
<taxonomicName id="ED98D7D89F0BE3370041F9CCFB5E2F2A" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[1072,1270,1641,1663]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="18" pageNumber="19" phylum="Mollusca" rank="species" species="toddi" status="sp. nov.">
|
||
<emphasis id="18EC70499F0BE3370041F9CCFB5E2F2A" box="[1072,1270,1641,1663]" italics="true" pageId="18" pageNumber="19">Mesosaccella toddi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0BE337008FF9CCFAF92F2A" bold="true" box="[1278,1361,1641,1663]" pageId="18" pageNumber="19">
|
||
<taxonomicNameLabel id="03DFCD329F0BE337008FF9CCFAF92F2A" box="[1278,1361,1641,1663]" pageId="18" pageNumber="19" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(G–K) Left valve lateral views of articulated specimens. (J) Details of external ornament showing characteristic commarginal ridges and rosette-shaped ornament in interridge spaces (arrowed). (K) Holotype showing strong posterior carinae. (L–M) Anterior and posterior views of holotype. Note three carinae and escutcheon visible in the posterior view. (N) Dorsal view of holotype showing three carinae and their relation to wide and shallow escutcheon. (O) Internal view of the dorsal margin of articulated specimen showing cardinal-most teeth and unidentified muscle scars. (P) Lateral view of right valve internal mould showing relatively strong, circular anterior adductor muscle scar and elongated posterior adductor muscle scar, as well as strong pallial line with shallow pallial sinus. (A–E) PMO 217.371, (F) PMO 217.539, (G) PMO 217.609, (H) PMO 217.610, (I–J) PMO 217.616, (K–N) PMO 224.861, (O) PMO 225.031, (P) PMO 224.862. Scale bars 5 mm (A–F, K–P), 2 mm (G–I).
|
||
</paragraph>
|
||
</caption>
|
||
<caption id="7EE7FCD39F0AE33604E6FA29FDBC2C94" ID-DOI="http://doi.org/10.5281/zenodo.4930124" ID-Zenodo-Dep="4930124" httpUri="https://zenodo.org/record/4930124/files/figure.png" pageId="19" pageNumber="20" startId="19.[151,250,1420,1442]" targetBox="[161,1386,224,1384]" targetPageId="19">
|
||
<paragraph id="2A27AC5B9F0AE33604E6FA29FDBC2C94" blockId="19.[151,1436,1420,1473]" pageId="19" pageNumber="20">
|
||
<emphasis id="18EC70499F0AE33604E6FA29FEBB2CF7" bold="true" box="[151,275,1420,1442]" pageId="19" pageNumber="20">FIGURE 8.</emphasis>
|
||
Measurements of
|
||
<taxonomicName id="ED98D7D89F0AE33605A3FA29FD0C2CF7" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[466,676,1420,1442]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="19" pageNumber="20" phylum="Mollusca" rank="species" species="rogovi" status="sp. nov.">
|
||
<emphasis id="18EC70499F0AE33605A3FA29FD0C2CF7" box="[466,676,1420,1442]" italics="true" pageId="19" pageNumber="20">Mesosaccella rogovi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0AE33606DAFA29FD552CF7" bold="true" box="[683,765,1420,1442]" pageId="19" pageNumber="20">
|
||
<taxonomicNameLabel id="03DFCD329F0AE33606DAFA29FD552CF7" box="[683,765,1420,1442]" pageId="19" pageNumber="20" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(in mm). (A) Height to length. (B) Width to length. (C) Width to height. (D) Posterior length to length.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="2A27AC5B9F0AE33104B4FA4DFF5C2885" blockId="19.[151,1437,1512,2005]" lastBlockId="20.[151,1437,151,464]" lastPageId="20" lastPageNumber="21" pageId="19" pageNumber="20">
|
||
<emphasis id="18EC70499F0AE33604B4FA4DFEFF2F54" bold="true" box="[197,343,1512,1537]" pageId="19" pageNumber="20">Description.</emphasis>
|
||
Shell small to medium in size, up to
|
||
<quantity id="ED6001BE9F0AE3360683FA4DFCFD2F55" box="[754,853,1512,1537]" metricMagnitude="-2" metricUnit="m" metricValue="1.25" pageId="19" pageNumber="20" unit="mm" value="12.5">12.5 mm</quantity>
|
||
long,
|
||
<quantity id="ED6001BE9F0AE33607EAFA4DFC582F55" box="[923,1008,1512,1537]" metricMagnitude="-3" metricUnit="m" metricValue="8.2" pageId="19" pageNumber="20" unit="mm" value="8.2">8.2 mm</quantity>
|
||
high, and
|
||
<quantity id="ED6001BE9F0AE3360015FA4DFB122F55" box="[1124,1210,1512,1537]" metricMagnitude="-3" metricUnit="m" metricValue="7.1" pageId="19" pageNumber="20" unit="mm" value="7.1">7.1 mm</quantity>
|
||
wide, elongated (H/ L≈0.72), and inflated (W/L≈0.52, W/H≈0.81), with more inflated specimens more frequent than less inflated. Moderately inequilateral (Pl/L≈0.72) throughout observed ontogeny. Orthogyrate beaks, passing into broadly curved anterodorsal margin through shallow concavity directly in front of beaks. Anterodorsal margin bends down and gets more tightly rounded to form broadly arcuate anterior margin, which gets progressively less curved and passes smoothly into ventral margin. Ventral margin gently rounded, deepest approximately below beaks. Posterior to first carina ventral margin oblique, with shallow sinus developed on larger specimens, connected to shallow, but well defined sulcus. Posterior shell extremity pointed, supported on second carina. Posterodorsal shell margin straight, joining beak through very small and shallow concavity directly behind it. External ornament of weak commarginal growth lines, obscured in shell mid-flank by strong, commarginal ridges transecting growth lines obliquely. Interridge spaces occupied by rows of rosette-shaped ornament arranged in regular intervals. Posterior area ornamented only by growth lines and rosettes; delineated by two strong carinae. First carina forms angle of
|
||
<emphasis id="18EC70499F0AE33604E6F83CFF102EE5" box="[151,184,1945,1968]" italics="true" pageId="19" pageNumber="20">ca.</emphasis>
|
||
55° with anteroposterior axis and visible throughout observed ontogeny. Second carina forms approximate angle of 27° with anteroposterior axis and also visible throughout ontogeny. Escutcheon wide, shallow, bounded by third carina. Dentition taxodont with long and straight teeth arranged in rows along hinge line. Specimen approximately
|
||
<quantity id="ED6001BE9F0DE33104E6FF19FF702986" box="[151,216,188,213]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" pageId="20" pageNumber="21" unit="mm" value="9.0">9 mm</quantity>
|
||
in length has nine teeth in anterior row and 16 teeth in posterior row. No resilifer; teeth joining below beak to form single teeth row. Anterior adductor muscle scar circular and well impressed; rather small. In specimen
|
||
<emphasis id="18EC70499F0DE331011DFF44FA2629AD" box="[1388,1422,225,248]" italics="true" pageId="20" pageNumber="21">ca.</emphasis>
|
||
<quantity id="ED6001BE9F0DE33101FFFF7AFF6B284E" metricMagnitude="-3" metricUnit="m" metricValue="9.0" pageId="20" pageNumber="21" unit="mm" value="9.0">9 mm</quantity>
|
||
long anterior adductor muscle scar is
|
||
<quantity id="ED6001BE9F0DE33106F5FEA1FD60284E" box="[644,712,260,285]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="20" pageNumber="21" unit="mm" value="1.0">1 mm</quantity>
|
||
in diameter. Anterior adductor muscle scar positioned slightly above anteroposterior axis. Posterior adductor muscle scar poorly visible, small, elongated, positioned above pallial sinus. Five pairs of elongated muscle scars present directly underneath hinge plate: two in anterior part of hinge plate, one underneath cardinal area and two pairs of longer muscle scars present underneath posterior part of hinge plate. Some of these may represent pedal muscle attachments. Pallial line well impressed; pallial sinus shallow.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="7EE7FCD39F0DE33104E6F9EBFDBC2FD7" ID-DOI="http://doi.org/10.5281/zenodo.4930126" ID-Zenodo-Dep="4930126" httpUri="https://zenodo.org/record/4930126/files/figure.png" pageId="20" pageNumber="21" startId="20.[151,250,1614,1636]" targetBox="[198,1392,509,1599]" targetPageId="20">
|
||
<paragraph id="2A27AC5B9F0DE33104E6F9EBFDBC2FD7" blockId="20.[151,1436,1614,1666]" pageId="20" pageNumber="21">
|
||
<emphasis id="18EC70499F0DE33104E6F9EBFEBC2F31" bold="true" box="[151,276,1614,1636]" pageId="20" pageNumber="21">FIGURE 9.</emphasis>
|
||
Measurements of
|
||
<taxonomicName id="ED98D7D89F0DE33105A5F9EBFD322F31" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[468,666,1614,1636]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="toddi" status="sp. nov.">
|
||
<emphasis id="18EC70499F0DE33105A5F9EBFD322F31" box="[468,666,1614,1636]" italics="true" pageId="20" pageNumber="21">Mesosaccella toddi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0DE33106D3F9EBFD5C2F31" bold="true" box="[674,756,1614,1636]" pageId="20" pageNumber="21">
|
||
<taxonomicNameLabel id="03DFCD329F0DE33106D3F9EBFD5C2F31" box="[674,756,1614,1636]" pageId="20" pageNumber="21" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(in mm). (A) Height to length. (B) Width to length. (C) Width to height. (D) Posterior length to length.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="6282FFD09F0DE33004B4F90AFD332BEB" lastPageId="21" lastPageNumber="22" pageId="20" pageNumber="21" type="discussion">
|
||
<paragraph id="2A27AC5B9F0DE33004B4F90AFC1A284E" blockId="20.[151,1436,1711,2024]" lastBlockId="21.[151,1437,151,536]" lastPageId="21" lastPageNumber="22" pageId="20" pageNumber="21">
|
||
<emphasis id="18EC70499F0DE33104B4F90AFE912F9D" bold="true" box="[197,313,1711,1736]" pageId="20" pageNumber="21">Remarks.</emphasis>
|
||
Protobranch bivalves with a shell shape similar to
|
||
<taxonomicName id="ED98D7D89F0DE331071FF915FC642F9D" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[878,972,1711,1736]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0DE331071FF915FC2D2F92" box="[878,901,1712,1735]" italics="true" pageId="20" pageNumber="21">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0DE33107E2F90AFC642F9D" box="[915,972,1711,1736]" italics="true" pageId="20" pageNumber="21">toddi</emphasis>
|
||
</taxonomicName>
|
||
are known from several other Cretaceous localities.
|
||
<bibRefCitation id="4E09D1AA9F0DE331057AF976FE022FB9" author="Woods, H." box="[267,426,1747,1772]" pageId="20" pageNumber="21" pagination="1 - 72" refId="ref42704" refString="Woods, H. (1899) A monograph of the Cretaceous Lamellibranchia. Vol. I. Palaeontographical Society Monographs, 53, 1 - 72, pls. 1 - 14." type="journal article" year="1899">Woods (1899)</bibRefCitation>
|
||
listed several carinated species from the Cretaceous of
|
||
<collectingCountry id="528FECCB9F0DE3310050F976FBD62FB9" box="[1057,1150,1747,1772]" name="United Kingdom" pageId="20" pageNumber="21">England</collectingCountry>
|
||
which he assigned to the genus
|
||
<taxonomicName id="ED98D7D89F0DE3310493F952FE722E45" authority="Link, 1807" authorityName="Link" authorityYear="1807" box="[226,474,1783,1808]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="genus">
|
||
<emphasis id="18EC70499F0DE3310493F952FEE72E45" box="[226,335,1783,1808]" italics="true" pageId="20" pageNumber="21">Nuculana</emphasis>
|
||
<bibRefCitation id="4E09D1AA9F0DE3310528F952FE722E45" author="Link D. H. F." box="[345,474,1783,1808]" pageId="20" pageNumber="21" pagination="101 - 165" refId="ref36784" refString="Link D. H. F. (1807) Beschreibung der Naturalien-Sammlung der Universitat zu Rostock, 3 abt. Adlers Erben, Rostock, 101 - 165. http: // dx. doi. org / 10.5962 / bhl. title. 69815" type="book chapter" year="1807">Link, 1807</bibRefCitation>
|
||
</taxonomicName>
|
||
. In our opinion these belong to both
|
||
<taxonomicName id="ED98D7D89F0DE33107FCF952FC522E45" authorityName="Link" authorityYear="1807" box="[909,1018,1783,1808]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="genus">
|
||
<emphasis id="18EC70499F0DE33107FCF952FC522E45" box="[909,1018,1783,1808]" italics="true" pageId="20" pageNumber="21">Nuculana</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="ED98D7D89F0DE3310047F952FB662E45" authorityName="Chavan" authorityYear="1946" box="[1078,1230,1783,1808]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="genus">
|
||
<emphasis id="18EC70499F0DE3310047F952FB662E45" box="[1078,1230,1783,1808]" italics="true" pageId="20" pageNumber="21">Mesosaccella</emphasis>
|
||
</taxonomicName>
|
||
. For example, no resilifer is visible on the drawings of
|
||
<taxonomicName id="ED98D7D89F0DE331064CF8B9FD042E61" authorityName="J. de C. Sowerby" authorityYear="1836" box="[573,684,1819,1844]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="lineata">
|
||
<emphasis id="18EC70499F0DE331064CF8B9FDF82E66" box="[573,592,1820,1843]" italics="true" pageId="20" pageNumber="21">N</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0DE331062FF8BEFD042E61" box="[606,684,1819,1844]" italics="true" pageId="20" pageNumber="21">lineata</emphasis>
|
||
</taxonomicName>
|
||
in
|
||
<bibRefCitation id="4E09D1AA9F0DE33106A0F8BEFCC22E61" author="Woods, H." box="[721,874,1819,1844]" pageId="20" pageNumber="21" pagination="1 - 72" refId="ref42704" refString="Woods, H. (1899) A monograph of the Cretaceous Lamellibranchia. Vol. I. Palaeontographical Society Monographs, 53, 1 - 72, pls. 1 - 14." type="journal article" year="1899">Woods (1899</bibRefCitation>
|
||
, pl. 1, fig. 31d), which excludes this species from
|
||
<emphasis id="18EC70499F0DE33104E6F89AFDB62E02" box="[151,542,1855,1880]" italics="true" pageId="20" pageNumber="21">
|
||
<taxonomicName id="ED98D7D89F0DE33104E6F89AFEA02E0D" authorityName="Link" authorityYear="1807" box="[151,264,1855,1880]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="genus">Nuculana</taxonomicName>
|
||
.
|
||
<taxonomicName id="ED98D7D89F0DE3310565F89AFDB62E02" authorityName="Woods" authorityYear="1899" box="[276,542,1855,1880]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="speetoniensis">Nuculana speetoniensis</taxonomicName>
|
||
</emphasis>
|
||
(
|
||
<bibRefCitation id="4E09D1AA9F0DE331065FF89AFD692E0D" author="Woods, H." box="[558,705,1855,1880]" pageId="20" pageNumber="21" pagination="1 - 72" refId="ref42704" refString="Woods, H. (1899) A monograph of the Cretaceous Lamellibranchia. Vol. I. Palaeontographical Society Monographs, 53, 1 - 72, pls. 1 - 14." type="journal article" year="1899">Woods 1899</bibRefCitation>
|
||
, p. 3. pl. 1, figs. 6–7) from the Lower Cretaceous Speeton Clay has a very similar shell shape to
|
||
<taxonomicName id="ED98D7D89F0DE3310664F8C1FDDF2E29" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[533,631,1891,1916]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0DE3310664F8C1FDDF2E29" box="[533,631,1891,1916]" italics="true" pageId="20" pageNumber="21">M. toddi</emphasis>
|
||
</taxonomicName>
|
||
, the main difference between them being the shorter and less pointed posterior margin of
|
||
<taxonomicName id="ED98D7D89F0DE3310506F82DFD852ECA" authorityName="Woods" authorityYear="1899" box="[375,557,1928,1951]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="speetoniensis">
|
||
<emphasis id="18EC70499F0DE3310506F82DFD852ECA" box="[375,557,1928,1951]" italics="true" pageId="20" pageNumber="21">N. speetoniensis</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
<taxonomicName id="ED98D7D89F0DE331064DF822FC402EF5" authority="J. de Sowerby, 1836" authorityName="J. de C. Sowerby" authorityYear="1836" box="[572,1000,1927,1952]" class="Bivalvia" family="Nuculanidae" genus="Nuculana" kingdom="Animalia" order="Nuculanoida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="lineata">
|
||
<emphasis id="18EC70499F0DE331064DF822FD562EF5" box="[572,766,1927,1952]" italics="true" pageId="20" pageNumber="21">Nuculana lineata</emphasis>
|
||
J. de
|
||
<bibRefCitation id="4E09D1AA9F0DE3310731F822FC402EF5" author="Sowerby, J. de" box="[832,1000,1927,1952]" pageId="20" pageNumber="21" pagination="335 - 349" refId="ref40359" refString="Sowerby, J. de C. (1836) Observation on some of the strata between the chalk and the Oxford Oolite in the South-East of England. In: Fitton, W. H. (Ed.), Transactions of the Geological Society of London, 2, 4 (2), 335 - 349, pls. 11 - 23. http: // dx. doi. org / 10.1144 / transgslb. 4.2.103" type="journal article" year="1836">Sowerby, 1836</bibRefCitation>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation id="4E09D1AA9F0DE3310786F822FB212EF5" author="Woods, H." box="[1015,1161,1927,1952]" pageId="20" pageNumber="21" pagination="1 - 72" refId="ref42704" refString="Woods, H. (1899) A monograph of the Cretaceous Lamellibranchia. Vol. I. Palaeontographical Society Monographs, 53, 1 - 72, pls. 1 - 14." type="journal article" year="1899">Woods 1899</bibRefCitation>
|
||
, p. 7, pl. 1, figs. 28–32), from the Lower Cretaceous of Southern
|
||
<collectingCountry id="528FECCB9F0DE33106FEF80EFD442E91" box="[655,748,1963,1988]" name="United Kingdom" pageId="20" pageNumber="21">England</collectingCountry>
|
||
has a similar shape and ornament to
|
||
<taxonomicName id="ED98D7D89F0DE33100A0F809FA912E91" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[1233,1337,1963,1988]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0DE33100A0F809FB402E96" box="[1233,1256,1964,1987]" italics="true" pageId="20" pageNumber="21">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0DE331008EF80EFA912E91" box="[1279,1337,1963,1988]" italics="true" pageId="20" pageNumber="21">toddi</emphasis>
|
||
</taxonomicName>
|
||
, having commarginal ridges fading on the anterior and posterior shell parts, but can be distinguished from
|
||
<taxonomicName id="ED98D7D89F0DE3310165F875FADD2EBD" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[1300,1397,1999,2024]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="20" pageNumber="21" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0DE3310165F875FA832EB2" box="[1300,1323,2000,2023]" italics="true" pageId="20" pageNumber="21">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0DE331014DF86AFADD2EBD" box="[1340,1397,1999,2024]" italics="true" pageId="20" pageNumber="21">toddi</emphasis>
|
||
</taxonomicName>
|
||
by being less inflated and having a rounded posterior with less pronounced carinae. In the Aptian of Spitsbergen
|
||
<bibRefCitation id="4E09D1AA9F0CE33004E6FF19FE582980" author="Sokolov, D & Bodylevsky, W." box="[151,496,188,213]" pageId="21" pageNumber="22" pagination="1 - 151" refId="ref39991" refString="Sokolov, D & Bodylevsky, W. (1931) Jura- und Kreidefaunen von Spitsbergen. Skrifter om Svalbard og Ishavet, 35, 1 - 151, pls. 1 - 14." type="journal article" year="1931">Sokolov & Bodylevsky (1931</bibRefCitation>
|
||
, p. 66, pl. 12, figs. 4–6) recorded
|
||
<taxonomicName id="ED98D7D89F0CE33007F1FF19FBC62980" box="[896,1134,188,213]" class="Bivalvia" family="Bathyspinulidae" genus="Leda" higherTaxonomySource="CoL" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="angulatostriata">
|
||
<emphasis id="18EC70499F0CE33007F1FF19FBC62980" box="[896,1134,188,213]" italics="true" pageId="21" pageNumber="22">Leda angulatostriata</emphasis>
|
||
</taxonomicName>
|
||
, which has a very similar shell shape to
|
||
<taxonomicName id="ED98D7D89F0CE3300545FF44FE3D29AD" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[308,405,223,248]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0CE3300545FF44FEE329AD" box="[308,331,225,248]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE3300528FF7AFE3D29AD" box="[345,405,223,248]" italics="true" pageId="21" pageNumber="22">toddi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0CE33005E4FF7AFE3129AD" box="[405,409,223,248]" italics="true" pageId="21" pageNumber="22">,</emphasis>
|
||
the main difference being
|
||
<taxonomicName id="ED98D7D89F0CE33006B3FF44FC2429AD" box="[706,908,223,248]" class="Bivalvia" family="Bathyspinulidae" genus="Leda" higherTaxonomySource="CoL" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="angulatostriata">
|
||
<emphasis id="18EC70499F0CE33006B3FF44FC2429AD" box="[706,908,223,248]" italics="true" pageId="21" pageNumber="22">L. angulatostriata</emphasis>
|
||
</taxonomicName>
|
||
has a less pronounced posterior carination than
|
||
<taxonomicName id="ED98D7D89F0CE33004E6FEA0FF5D2848" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[151,245,260,285]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0CE33004E6FEA0FF062849" box="[151,174,261,284]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE33004CDFEA1FF5D2848" box="[188,245,260,285]" italics="true" pageId="21" pageNumber="22">toddi</emphasis>
|
||
</taxonomicName>
|
||
. In our opinion
|
||
<taxonomicName id="ED98D7D89F0CE33005DAFEA0FDDD2848" box="[427,629,260,285]" class="Bivalvia" family="Bathyspinulidae" genus="Leda" higherTaxonomySource="CoL" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="angulatostriata">
|
||
<emphasis id="18EC70499F0CE33005DAFEA0FE122849" box="[427,442,261,284]" italics="true" pageId="21" pageNumber="22">L</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE33005B9FEA1FDDD2848" box="[456,629,260,285]" italics="true" pageId="21" pageNumber="22">angulatostriata</emphasis>
|
||
</taxonomicName>
|
||
also belongs to
|
||
<emphasis id="18EC70499F0CE330075AFEA1FC022848" box="[811,938,260,285]" italics="true" pageId="21" pageNumber="22">Mesaccella</emphasis>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="2A27AC5B9F0CE33004B4FE82FA212815" blockId="21.[151,1437,151,536]" box="[197,1417,295,320]" pageId="21" pageNumber="22">
|
||
<emphasis id="18EC70499F0CE33004B4FE82FEFF2815" bold="true" box="[197,343,295,320]" pageId="21" pageNumber="22">Occurrence.</emphasis>
|
||
Seeps 1, 3, 9 and 12 (Upper Volgian–latest Ryazanian), Slottsmøya Member,
|
||
<collectingCountry id="528FECCB9F0CE33000B1FE82FA8C2815" box="[1216,1316,295,320]" name="Svalbard and Jan Mayen" pageId="21" pageNumber="22">Svalbard</collectingCountry>
|
||
(
|
||
<tableCitation id="671A99E09F0CE3300143FE82FAD02815" box="[1330,1400,295,320]" captionStart="TABLE 1" captionStartId="5.[151,239,798,821]" captionTargetPageId="5" captionText="TABLE 1. Distribution of discussed species in the Svalbard seeps." httpUri="http://table.plazi.org/id/7EE7FCD39F1CE32004E6FCBBFCF62A60" pageId="21" pageNumber="22" tableUuid="7EE7FCD39F1CE32004E6FCBBFCF62A60">Tab. 1</tableCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="2A27AC5B9F0CE33004B4FEE9FC0A2B42" blockId="21.[151,1437,151,536]" pageId="21" pageNumber="22">
|
||
<emphasis id="18EC70499F0CE33004B4FEE9FEDA2830" bold="true" box="[197,370,332,357]" pageId="21" pageNumber="22">Palaeoecology.</emphasis>
|
||
<taxonomicName id="ED98D7D89F0CE330050CFEE9FDF22830" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[381,602,332,357]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0CE330050CFEE9FDF22830" box="[381,602,332,357]" italics="true" pageId="21" pageNumber="22">Mesosaccella toddi</emphasis>
|
||
</taxonomicName>
|
||
was probably a shallow burrowing deposit feeder, like
|
||
<taxonomicName id="ED98D7D89F0CE330009DFEE8FAF62831" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[1260,1374,332,356]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="rogovi">
|
||
<emphasis id="18EC70499F0CE330009DFEE8FAAB2831" box="[1260,1283,333,356]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE3300167FEE8FAF62831" box="[1302,1374,333,356]" italics="true" pageId="21" pageNumber="22">rogovi</emphasis>
|
||
</taxonomicName>
|
||
. The inflated shell of
|
||
<taxonomicName id="ED98D7D89F0CE330053CFED4FE0528DD" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[333,429,367,392]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0CE330053CFED4FECC28DD" box="[333,356,369,392]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE3300502FECAFE0528DD" box="[371,429,367,392]" italics="true" pageId="21" pageNumber="22">toddi</emphasis>
|
||
</taxonomicName>
|
||
, its relatively short posterior and shallow pallial sinus suggests, however, that this species was a slow burrower living underneath the sediment-water interface. The strong commarginal ornament and relatively thick shell may have been adaptations for burrowing in coarser sediment, like silt and sand (e.g.
|
||
<bibRefCitation id="4E09D1AA9F0CE3300148FE12FF7A28A0" author="Marshall, B. A." pageId="21" pageNumber="22" pagination="425 - 436" refId="ref37034" refString="Marshall, B. A. (1978) The genus Neilo in New Zealand (Mollusca: Bivalvia). New Zealand Journal of Zoology, 5, 425 - 436. http: // dx. doi. org / 10.1080 / 03014223.1978.10428329" type="journal article" year="1978">Marshall 1978</bibRefCitation>
|
||
), or it might have been an adaptation for living in acidic environment (e.g.
|
||
<bibRefCitation id="4E09D1AA9F0CE330006EFE79FB0828A0" author="Allen, J. A." box="[1055,1184,476,501]" pageId="21" pageNumber="22" pagination="141 - 151" refId="ref29216" refString="Allen, J. A. (1993) A new deep-water hydrothermal species of Nuculana (Bivalvia: Protobranchia) from the Guaymas Basin. Malacologia, 35, 141 - 151." type="journal article" year="1993">Allen 1993</bibRefCitation>
|
||
). As for
|
||
<taxonomicName id="ED98D7D89F0CE3300173FE78FADA28A1" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[1282,1394,476,500]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="rogovi">
|
||
<emphasis id="18EC70499F0CE3300173FE78FAB128A1" box="[1282,1305,477,500]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE3300156FE78FADA28A1" box="[1319,1394,477,500]" italics="true" pageId="21" pageNumber="22">rogovi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F0CE3300103FE78FADE28A1" box="[1394,1398,477,500]" italics="true" pageId="21" pageNumber="22">,</emphasis>
|
||
<taxonomicName id="ED98D7D89F0CE330010CFE78FF792B4D" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="21" pageNumber="22" phylum="Mollusca" rank="species" species="toddi">
|
||
<emphasis id="18EC70499F0CE330010CFE78FA3C28A1" box="[1405,1428,477,500]" italics="true" pageId="21" pageNumber="22">M</emphasis>
|
||
.
|
||
<emphasis id="18EC70499F0CE33004E6FE5AFF792B4D" box="[151,209,511,536]" italics="true" pageId="21" pageNumber="22">toddi</emphasis>
|
||
</taxonomicName>
|
||
might have fed on chemosynthetically produced organic matter.
|
||
</paragraph>
|
||
<paragraph id="2A27AC5B9F0CE33004E6FDFBFDD12B2D" blockId="21.[151,633,606,632]" box="[151,633,606,632]" pageId="21" pageNumber="22">
|
||
<emphasis id="18EC70499F0CE33004E6FDFBFDD12B2D" bold="true" box="[151,633,606,632]" pageId="21" pageNumber="22">
|
||
Subclass
|
||
<taxonomicName id="ED98D7D89F0CE330057BFDFBFDD12B2D" authority="Grobben, 1894" authorityName="Grobben" authorityYear="1894" box="[266,633,606,632]" pageId="21" pageNumber="22" rank="subClass" subClass="Autobranchia">
|
||
Autobranchia
|
||
<bibRefCitation id="4E09D1AA9F0CE33005CEFDFBFDD12B2D" author="Grobben, C." box="[447,633,606,632]" pageId="21" pageNumber="22" pagination="61 - 86" refId="ref33385" refString="Grobben, C. (1894) Zur Kenntniss der Morphologie, der Verwandtschaftsverhaltnisse und des Systems der Mollusken. Kaiserliche Akademie der Wissenschaften (Mathematisch-Naturwissenschaftlichen Classe), Sitzungsberichte, 103, 61 - 86." type="journal article" year="1894">Grobben, 1894</bibRefCitation>
|
||
</taxonomicName>
|
||
</emphasis>
|
||
</paragraph>
|
||
<paragraph id="2A27AC5B9F0CE33004E6FD01FD332BEB" blockId="21.[151,667,676,702]" box="[151,667,676,702]" pageId="21" pageNumber="22">
|
||
<emphasis id="18EC70499F0CE33004E6FD01FD332BEB" bold="true" box="[151,667,676,702]" pageId="21" pageNumber="22">
|
||
Superorder
|
||
<taxonomicName id="ED98D7D89F0CE330055FFD01FD332BEB" authority="Beurlen, 1944" authorityName="Beurlen" authorityYear="1944" box="[302,667,676,702]" pageId="21" pageNumber="22" rank="superOrder" superOrder="Pteriomorphia">
|
||
Pteriomorphia
|
||
<bibRefCitation id="4E09D1AA9F0CE330059FFD01FD332BEB" author="Beurlen, K." box="[494,667,676,702]" pageId="21" pageNumber="22" pagination="133 - 145" refId="ref29898" refString="Beurlen, K. (1944) Beitrage zur Stammesgeschichte der Muscheln. Mathematisch-Naturwissenschaftliche Abteilung der Bayerischen Akademie der Wissenschaften zu Munchen, Sitzungsberichte, 1 - 2, 133 - 145." type="journal article" year="1944">Beurlen, 1944</bibRefCitation>
|
||
</taxonomicName>
|
||
</emphasis>
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |