188 lines
28 KiB
XML
188 lines
28 KiB
XML
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<mods:title id="2BAC053A45DB562C5909B89C7BF164F6">Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard</mods:title>
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<mods:namePart id="C39E8F94890272744DAAA7129D30D60E">Hryniewicz, Krzysztof</mods:namePart>
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<mods:nameIdentifier id="8407B9CA43CE436C3E9007B8014722F5" type="email">krzysztof.hryniewicz@nhm.uio.no</mods:nameIdentifier>
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<mods:namePart id="00FB7C2B938B907A23282428F6DBCF8D">Little, Crispin T. S.</mods:namePart>
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<mods:namePart id="34EAE8158F62249312A69E3C05545A95">Nakrem, Hans Arne</mods:namePart>
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<mods:nameIdentifier id="FEE3BB0570702E7BF97600B4D1A388C9" type="email">krzysztof.hryniewicz@nhm.uio.no</mods:nameIdentifier>
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<mods:title id="80B84530DF53C708B3EBB8CCD441DD43">Zootaxa</mods:title>
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<mods:date id="E7C7EA63BA51D5E2BDC38E3B340B7B5B">2014</mods:date>
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<mods:number id="F94F505C4C690E196DF2A2807D1037B8">2014-09-02</mods:number>
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<mods:number id="F11AD19D7CB28F7503F7513040AC1CFF">3859</mods:number>
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<treatment id="A2311D4D9F17E32A04E6FE2FFEEB2830" ID-DOI="http://doi.org/10.5281/zenodo.4929767" ID-GBIF-Taxon="184646045" ID-Zenodo-Dep="4929767" LSID="urn:lsid:plazi:treatment:A2311D4D9F17E32A04E6FE2FFEEB2830" httpUri="http://treatment.plazi.org/id/A2311D4D9F17E32A04E6FE2FFEEB2830" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15">
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<subSubSection id="6282FFD09F17E32B04E6FE2FFD9928F1" box="[151,561,394,420]" pageId="14" pageNumber="15" type="nomenclature">
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<paragraph id="2A27AC5B9F17E32B04E6FE2FFD9928F1" blockId="14.[151,561,394,454]" box="[151,561,394,420]" pageId="14" pageNumber="15">
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<heading id="716F1B379F17E32B04E6FE2FFD9928F1" bold="true" box="[151,561,394,420]" fontSize="11" level="2" pageId="14" pageNumber="15" reason="4">
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<taxonomicName id="ED98D7D89F17E32B04E6FE2FFD9928F1" authority="Sanin, 1976" authorityName="Sanin" authorityYear="1976" box="[151,561,394,420]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="chetaensis">
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<emphasis id="18EC70499F17E32B04E6FE2FFD9928F1" bold="true" box="[151,561,394,420]" pageId="14" pageNumber="15">
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<emphasis id="18EC70499F17E32B04E6FE2FFE3128F1" bold="true" box="[151,409,394,420]" italics="true" pageId="14" pageNumber="15">Dacromya chetaensis</emphasis>
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<bibRefCitation id="4E09D1AA9F17E32B05D1FE2FFD9928F1" author="Sanin, V. Ya." box="[416,561,394,420]" pageId="14" pageNumber="15" pagination="1 - 70" refId="ref39709" refString="Sanin, V. Ya. (1976) Early Cretaceous Ctenodontida of the North of Siberia. Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 310, 1 - 70. [in Russian]" type="journal article" year="1976">Sanin, 1976</bibRefCitation>
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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="6282FFD09F17E32B04E6FE08FC452B5E" pageId="14" pageNumber="15" type="description">
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<paragraph id="2A27AC5B9F17E32B04E6FE08FEED2893" blockId="14.[151,561,394,454]" box="[151,325,429,454]" pageId="14" pageNumber="15">
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(
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<figureCitation id="B2A3B0DE9F17E32B04EFFE08FE942893" box="[158,316,429,454]" captionStart="FIGURE 5" captionStartId="14.[151,250,1494,1516]" captionTargetId="figure-22@13.[171,1409,195,1969]" captionTargetPageId="13" captionText="FIGURE 5. (A–N) Nucinella svalbardensis sp. nov. (A–D) Lateral views of holotype showing shape of the articulated internal mould, anterior adductor muscle scar and possible anterior pedal retractor scar, rounded posterior margin and fine radial striations on internal mould surface. (E) Dorsal view showing weakly opisthogyrate umbo and deep ligament pit on the posterodorsal margin. (F) Anterior view showing anterior adductor muscle scar projecting weakly beyond pallial line. (G) Lateral view showing commarginal ornament on external shell surface. (H–I) Dorsal view of partially articulated specimen showing length of the cardinal teeth and relation of the possible ligament to the cardinal dentition. (J–K) Lateral view of the cardinal part of the hinge plate showing arrangement and shape of the cardinal teeth. (L) Ventral view of silicone rubber cast of the dorsal margin of articulated internal mould showing sabre-shaped lateral teeth and interlocked cardinal teeth. (M–N) Silicone rubber casts of right valve internal moulds showing two lateral teeth. (O–Q) Dacromya chetaensis Sanin, 1976. (O–P) Lateral and dorsal views showing shape of internal mould, taxodont dentition, anterior and posterior adductor muscle scars. (Q) Posterodorsal shell margin showing weak growth lines. (R–T) Mesosaccella rogovi sp. nov. (R) Lateral view of holotype left valve shell surface showing characteristic growth-line deflections around the posterior margin and carina subparallel to the dorsal margin. (S–T) Lateral view of left valve internal mould showing anterior adductor muscle scar, weak posterior adductor muscle scar and pallial line. (A–F) PMO 217.171, (G) PMO 224.978, (H–I) PMO 225.042, (J–K) PMO 224.981, (L–M) PMO 217.217, (N) PMO 225.020, (O–P) PMO 217.581, (Q) PMO 226.600, (R) PMO 224.971, (S–T) PMO 217.229. Scale bars 5 mm." figureDoi="http://doi.org/10.5281/zenodo.5228091" httpUri="https://zenodo.org/record/5228091/files/figure.png" pageId="14" pageNumber="15">Figure 5 O–Q</figureCitation>
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)
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</paragraph>
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<paragraph id="2A27AC5B9F17E32B04E6FE50FC452B5E" blockId="14.[151,1005,501,523]" box="[151,1005,501,523]" pageId="14" pageNumber="15">
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1976
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<taxonomicName id="ED98D7D89F17E32B04A1FE53FE022B5E" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[208,426,501,523]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="chetaensis" status="sp. nov.">
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<emphasis id="18EC70499F17E32B04A1FE53FE022B5E" box="[208,426,501,523]" italics="true" pageId="14" pageNumber="15">Dacromya chetaensis</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="03DFCD329F17E32B05C1FE53FE532B5E" box="[432,507,501,523]" pageId="14" pageNumber="15" rank="species">nov. sp.</taxonomicNameLabel>
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—Sanin, p. 26, pl. 6, figs. 10–11; pl. 7, figs. 1–6.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F17E32B04E6FD92FD9E2B20" pageId="14" pageNumber="15" type="materials_examined">
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<paragraph id="2A27AC5B9F17E32B04E6FD92FD9E2B20" blockId="14.[151,1437,567,1384]" pageId="14" pageNumber="15">
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<emphasis id="18EC70499F17E32B04E6FD92FE202B05" bold="true" box="[151,392,567,592]" pageId="14" pageNumber="15">Material examined.</emphasis>
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Three specimens; articulated internal moulds with some preserved shell material. See Appendix 1 for the list of specimens.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F17E32B04B4FDDAFC2D2D1D" pageId="14" pageNumber="15" type="description">
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<paragraph id="2A27AC5B9F17E32B04B4FDDAFF402BE8" blockId="14.[151,1437,567,1384]" pageId="14" pageNumber="15">
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<emphasis id="18EC70499F17E32B04B4FDDAFEFF2BCD" bold="true" box="[197,343,639,664]" pageId="14" pageNumber="15">Dimensions.</emphasis>
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<quantity id="ED6001BE9F17E32B0513FDDAFE4D2BC2" box="[354,485,639,664]" metricMagnitude="-3" metricUnit="m" metricValue="9.25" metricValueMax="11.5" metricValueMin="7.0" pageId="14" pageNumber="15" unit="mm" value="9.25" valueMax="11.5" valueMin="7.0">7–11.5 mm</quantity>
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in length,
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<quantity id="ED6001BE9F17E32B061BFDDAFCAC2BC2" box="[618,772,639,664]" metricMagnitude="-3" metricUnit="m" metricValue="6.175" metricValueMax="7.25" metricValueMin="5.1" pageId="14" pageNumber="15" unit="mm" value="6.175" valueMax="7.25" valueMin="5.1">5.1–7.25 mm</quantity>
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in height,
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<quantity id="ED6001BE9F17E32B07F8FDDAFB8A2BC2" box="[905,1058,639,664]" metricMagnitude="-3" metricUnit="m" metricValue="4.175" metricValueMax="5.25" metricValueMin="3.1" pageId="14" pageNumber="15" unit="mm" value="4.175" valueMax="5.25" valueMin="3.1">3.1–5.25 mm</quantity>
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in width. See Appendix 2C for details.
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</paragraph>
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<paragraph id="2A27AC5B9F17E32B04B4FD62FC2D2D1D" blockId="14.[151,1437,567,1384]" pageId="14" pageNumber="15">
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<emphasis id="18EC70499F17E32B04B4FD62FEFF2BB5" bold="true" box="[197,343,711,736]" pageId="14" pageNumber="15">Description.</emphasis>
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Shell small, with tear-drop shaped outline. Preserved shell fragments thin, with fine, densely spaced commarginal growth lines. Moderately to strongly inflated, with greatest width medially. Shell height around two-thirds of length, reaching a maximum medially and gradually diminishing towards anterior and posterior extremities. Anterior part of shell longer than posterior, arcuate, gently tapering. Anterodorsal margin weakly convex, more inclined than anteroventral margin. Ventral margin very gently rounded. Posterior shell part shorter than anterior, rostrate, rounded, and curved dorsally. Posterodorsal margin concave, hosting deep escutcheon. Beaks opisthogyrate, lunule elongated, sunken close to beaks, emerging towards anterior. Dentition taxodont with more than 10 teeth in anterior row and 7 to 10 teeth in posterior row. Cardinal area and ligament not preserved. Anterior and posterior adductor muscle scars circular, small, adhering to pallial line and positioned close to shell extremities on inside of pallial line. Posterior adductor muscle scar connected to beak with grooves, most likely formed during descending muscle growth. Pallial line entire.
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</paragraph>
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</subSubSection>
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<subSubSection id="6282FFD09F17E32A04B4FBF1FEEB2830" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15" type="discussion">
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<paragraph id="2A27AC5B9F17E32B04B4FBF1FC0D2C75" blockId="14.[151,1437,567,1384]" pageId="14" pageNumber="15">
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<emphasis id="18EC70499F17E32B04B4FBF1FE912D38" bold="true" box="[197,313,1108,1133]" pageId="14" pageNumber="15">Remarks.</emphasis>
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We include this species into
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<taxonomicName id="ED98D7D89F17E32B060BFBF0FC512D38" authority="Sanin, 1976" authorityName="Sanin" authorityYear="1976" box="[634,1017,1108,1133]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="chetaensis">
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<emphasis id="18EC70499F17E32B060BFBF0FCC22D38" box="[634,874,1108,1133]" italics="true" pageId="14" pageNumber="15">Dacromya chetaensis</emphasis>
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<bibRefCitation id="4E09D1AA9F17E32B0700FBF1FC512D38" author="Sanin, V. Ya." box="[881,1017,1108,1133]" pageId="14" pageNumber="15" pagination="1 - 70" refId="ref39709" refString="Sanin, V. Ya. (1976) Early Cretaceous Ctenodontida of the North of Siberia. Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 310, 1 - 70. [in Russian]" type="journal article" year="1976">Sanin, 1976</bibRefCitation>
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</taxonomicName>
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, based on its shell proportions, gently arched anterior margin and external ornament. It differs from
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<taxonomicName id="ED98D7D89F17E32B07F5FBDCFA802DC5" authority="(Sauvage, 1871)" baseAuthorityName="Sauvage" baseAuthorityYear="1871" box="[900,1320,1143,1168]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="venusta">
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<emphasis id="18EC70499F17E32B07F5FBDCFBF52DC5" box="[900,1117,1145,1168]" italics="true" pageId="14" pageNumber="15">Dacromya venusta</emphasis>
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(
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<bibRefCitation id="4E09D1AA9F17E32B0003FBD2FAB72DC5" author="Sauvage, H. E. & Rigaux, E." box="[1138,1311,1143,1168]" pageId="14" pageNumber="15" pagination="165 - 187" refId="ref39756" refString="Sauvage, H. E. & Rigaux, E. (1871) Diagnoses d'especes nouvelles des Terrains jurassiques superieurs de Boulogne-sur-Mer (Pas de Calais). Journal de Conchology, 20, 165 - 187, pls. 8 - 12." type="journal article" year="1871">Sauvage, 1871</bibRefCitation>
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)
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</taxonomicName>
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from the Kimmeridgian of
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<collectingCountry id="528FECCB9F17E32B0519FB39FE6D2DE0" box="[360,453,1180,1205]" name="United Kingdom" pageId="14" pageNumber="15">England</collectingCountry>
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(
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<bibRefCitation id="4E09D1AA9F17E32B05A8FB39FD572DE0" author="Clausen, C. K. & Wignall, P. B." box="[473,767,1180,1205]" pageId="14" pageNumber="15" pagination="97 - 149" refId="ref30639" refString="Clausen, C. K. & Wignall, P. B. (1990) Early Kimmeridgian bivalves of southern England. Mesozoic Research, 2, 97 - 149." type="journal article" year="1990">Clausen & Wignall 1990</bibRefCitation>
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) in having a more rounded anterior margin, less sloping anterodorsal margin and an external ornament of commarginal growth lines.
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<taxonomicName id="ED98D7D89F17E32B0036FB64FAE92D8D" authorityName="Sanin" authorityYear="1976" box="[1095,1345,1215,1240]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="chetaensis">
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<emphasis id="18EC70499F17E32B0036FB64FAE92D8D" box="[1095,1345,1215,1240]" italics="true" pageId="14" pageNumber="15">Dacromya chetaensis</emphasis>
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</taxonomicName>
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is less elongated, has more pointed umbones and shorter rostrum than
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<taxonomicName id="ED98D7D89F17E32B0716FB40FA982DA8" authority="Zakharov & Shurigin, 1974" authorityName="Zakharov & Shurigin" authorityYear="1974" box="[871,1328,1252,1277]" class="Bivalvia" family="Manzanellidae" genus="Nucinella" kingdom="Animalia" order="Solemyoida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="gigantea">
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<emphasis id="18EC70499F17E32B0716FB40FC442DA9" box="[871,1004,1253,1276]" italics="true" pageId="14" pageNumber="15">D. gigantea</emphasis>
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<bibRefCitation id="4E09D1AA9F17E32B0785FB41FA982DA8" author="Zakharov, V. A. & Shurigin, B. N." box="[1012,1328,1252,1277]" pageId="14" pageNumber="15" pagination="109 - 120" refId="ref43065" refString="Zakharov, V. A. & Shurigin, B. N. (1974) Biostratigraphic and palaeobiogeographic significance of rare Middle Jurassic bivalve mollusks of the Northern Siberia. Biostratigraphy of the Boreal Mesozoic. Transactions of the Institute of Geology and Geophisics, Siberian Branch of the Academy of Science of USSR, 136, 109 - 120, pls. 9 - 10. [in Russian]" type="journal article" year="1974">Zakharov & Shurigin, 1974</bibRefCitation>
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</taxonomicName>
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, from the Aalenian of the Taimyr Peninsula (
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<bibRefCitation id="4E09D1AA9F17E32B066CFAA2FCF92C75" author="Zakharov, V. A. & Shurigin, B. N." box="[541,849,1287,1312]" pageId="14" pageNumber="15" pagination="109 - 120" refId="ref43065" refString="Zakharov, V. A. & Shurigin, B. N. (1974) Biostratigraphic and palaeobiogeographic significance of rare Middle Jurassic bivalve mollusks of the Northern Siberia. Biostratigraphy of the Boreal Mesozoic. Transactions of the Institute of Geology and Geophisics, Siberian Branch of the Academy of Science of USSR, 136, 109 - 120, pls. 9 - 10. [in Russian]" type="journal article" year="1974">Zakharov & Shurigin 1974</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="4E09D1AA9F17E32B072DFAA2FC302C75" author="Zakharov, V. A. & Shurigin, B. N." box="[860,920,1287,1312]" pageId="14" pageNumber="15" pagination="1 - 206" refId="ref43137" refString="Zakharov, V. A. & Shurigin, B. N. (1978) Biogeography, facies and stratigraphy of the Middle Jurassic of Soviet Arctic (by bivalve molluscs). Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 352, 1 - 206. [in Russian]" type="journal article" year="1978">1978</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="2A27AC5B9F17E32B04B4FA89FB812C3D" blockId="14.[151,1437,567,1384]" pageId="14" pageNumber="15">
|
||
<emphasis id="18EC70499F17E32B04B4FA89FEFF2C10" bold="true" box="[197,343,1324,1349]" pageId="14" pageNumber="15">Occurrence.</emphasis>
|
||
Seep 12 (Upper Ryazanian), Slottsmøya Member,
|
||
<collectingCountry id="528FECCB9F17E32B07CAFA89FBB72C10" box="[955,1055,1324,1349]" name="Svalbard and Jan Mayen" pageId="14" pageNumber="15">Svalbard</collectingCountry>
|
||
(
|
||
<tableCitation id="671A99E09F17E32B0042FA89FBD72C10" box="[1075,1151,1324,1349]" 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="14" pageNumber="15" tableUuid="7EE7FCD39F1CE32004E6FCBBFCF62A60">Tab. 1</tableCitation>
|
||
). Known also from the Volgian–Valanginian of the Khatanga Depression, Northern Siberia (
|
||
<bibRefCitation id="4E09D1AA9F17E32B07E9FAEAFBB42C3D" author="Sanin, V. Ya." box="[920,1052,1359,1384]" pageId="14" pageNumber="15" pagination="1 - 70" refId="ref39709" refString="Sanin, V. Ya. (1976) Early Cretaceous Ctenodontida of the North of Siberia. Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 310, 1 - 70. [in Russian]" type="journal article" year="1976">Sanin 1976</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<caption id="7EE7FCD39F17E32B04E6FA73FF6D2E99" ID-DOI="http://doi.org/10.5281/zenodo.5228091" ID-Zenodo-Dep="5228091" httpUri="https://zenodo.org/record/5228091/files/figure.png" pageId="14" pageNumber="15" startId="14.[151,250,1494,1516]" targetBox="[171,1409,195,1969]" targetPageId="13">
|
||
<paragraph id="2A27AC5B9F17E32B04E6FA73FF6D2E99" blockId="14.[151,1436,1494,1996]" pageId="14" pageNumber="15">
|
||
<emphasis id="18EC70499F17E32B04E6FA73FEBA2CB9" bold="true" box="[151,274,1494,1516]" pageId="14" pageNumber="15">FIGURE 5.</emphasis>
|
||
(A–N)
|
||
<taxonomicName id="ED98D7D89F17E32B0510FA73FDFB2CB9" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[353,595,1494,1516]" class="Bivalvia" family="Manzanellidae" genus="Nucinella" kingdom="Animalia" order="Solemyoida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="svalbardensis" status="sp. nov.">
|
||
<emphasis id="18EC70499F17E32B0510FA73FDFB2CB9" box="[353,595,1494,1516]" italics="true" pageId="14" pageNumber="15">Nucinella svalbardensis</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F17E32B062BFA73FD022CB9" bold="true" box="[602,682,1494,1516]" pageId="14" pageNumber="15">
|
||
<taxonomicNameLabel id="03DFCD329F17E32B062BFA73FD022CB9" box="[602,682,1494,1516]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(A–D) Lateral views of holotype showing shape of the articulated internal mould, anterior adductor muscle scar and possible anterior pedal retractor scar, rounded posterior margin and fine radial striations on internal mould surface. (E) Dorsal view showing weakly opisthogyrate umbo and deep ligament pit on the posterodorsal margin. (F) Anterior view showing anterior adductor muscle scar projecting weakly beyond pallial line. (G) Lateral view showing commarginal ornament on external shell surface. (H–I) Dorsal view of partially articulated specimen showing length of the cardinal teeth and relation of the possible ligament to the cardinal dentition. (J–K) Lateral view of the cardinal part of the hinge plate showing arrangement and shape of the cardinal teeth. (L) Ventral view of silicone rubber cast of the dorsal margin of articulated internal mould showing sabre-shaped lateral teeth and interlocked cardinal teeth. (M–N) Silicone rubber casts of right valve internal moulds showing two lateral teeth. (O–Q)
|
||
<taxonomicName id="ED98D7D89F17E32B0789F972FAFD2FB9" authority="Sanin, 1976" authorityName="Sanin" authorityYear="1976" box="[1016,1365,1750,1772]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="chetaensis">
|
||
<emphasis id="18EC70499F17E32B0789F972FB792FB9" box="[1016,1233,1750,1772]" italics="true" pageId="14" pageNumber="15">Dacromya chetaensis</emphasis>
|
||
<bibRefCitation id="4E09D1AA9F17E32B00A9F973FAFD2FB9" author="Sanin, V. Ya." box="[1240,1365,1750,1772]" pageId="14" pageNumber="15" pagination="1 - 70" refId="ref39709" refString="Sanin, V. Ya. (1976) Early Cretaceous Ctenodontida of the North of Siberia. Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 310, 1 - 70. [in Russian]" type="journal article" year="1976">Sanin, 1976</bibRefCitation>
|
||
</taxonomicName>
|
||
. (O–P) Lateral and dorsal views showing shape of internal mould, taxodont dentition, anterior and posterior adductor muscle scars. (Q) Posterodorsal shell margin showing weak growth lines. (R–T)
|
||
<taxonomicName id="ED98D7D89F17E32B076BF8B3FC442E79" authority="Hryniewicz & Little & Nakrem, 2014" authorityName="Hryniewicz & Little & Nakrem" authorityYear="2014" box="[794,1004,1814,1836]" class="Bivalvia" family="Malletiidae" genus="Mesosaccella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="14" pageNumber="15" phylum="Mollusca" rank="species" species="rogovi" status="sp. nov.">
|
||
<emphasis id="18EC70499F17E32B076BF8B3FC442E79" box="[794,1004,1814,1836]" italics="true" pageId="14" pageNumber="15">Mesosaccella rogovi</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="18EC70499F17E32B0785F8B3FBED2E79" bold="true" box="[1012,1093,1814,1836]" pageId="14" pageNumber="15">
|
||
<taxonomicNameLabel id="03DFCD329F17E32B0785F8B3FBED2E79" box="[1012,1093,1814,1836]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(R) Lateral view of holotype left valve shell surface showing characteristic growth-line deflections around the posterior margin and carina subparallel to the dorsal margin. (S–T) Lateral view of left valve internal mould showing anterior adductor muscle scar, weak posterior adductor muscle scar and pallial line. (A–F) PMO 217.171, (G) PMO 224.978, (H–I) PMO 225.042, (J–K) PMO 224.981, (L–M) PMO 217.217, (N) PMO 225.020, (O–P) PMO 217.581, (Q) PMO 226.600, (R) PMO 224.971, (S–T) PMO 217.229. Scale bars 5 mm.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="2A27AC5B9F16E32A04E6FF32FEEB2830" blockId="15.[150,1438,151,357]" pageId="15" pageNumber="16">
|
||
<emphasis id="18EC70499F16E32A04E6FF32FEEC29E5" bold="true" box="[151,324,151,176]" pageId="15" pageNumber="16">Palaeoecology.</emphasis>
|
||
<taxonomicName id="ED98D7D89F16E32A053DFF3CFD9729E5" authorityName="Sanin" authorityYear="1976" box="[332,575,151,176]" class="Bivalvia" family="Nuculanidae" genus="Dacromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nuculanida" pageId="15" pageNumber="16" phylum="Mollusca" rank="species" species="chetaensis">
|
||
<emphasis id="18EC70499F16E32A053DFF3CFD9729E5" box="[332,575,151,176]" italics="true" pageId="15" pageNumber="16">Dacromya chetaensis</emphasis>
|
||
</taxonomicName>
|
||
was probably a mobile shallow burrowing deposit feeder without a siphon, as indicated by the lack of a pallial sinus. The streamlined shell with a blunt, weakly pointed anterior and short, rostrate posterior shows that it was probably an efficient burrower. In Siberia it is associated with sandy mudstones that were deposited in a low energy, shallow water setting (
|
||
<bibRefCitation id="4E09D1AA9F16E32A0735FEA1FC632848" author="Sanin, V. Ya." box="[836,971,260,285]" pageId="15" pageNumber="16" pagination="1 - 70" refId="ref39709" refString="Sanin, V. Ya. (1976) Early Cretaceous Ctenodontida of the North of Siberia. Transactions of the Institute of Geology and Geophysics, Siberian Branch of the Academy of Science of USSR, 310, 1 - 70. [in Russian]" type="journal article" year="1976">Sanin 1976</bibRefCitation>
|
||
). This mode of life is typical for Recent nuculids, which are shallow burrowers using palps to collect sediment, which they process for organic material (
|
||
<bibRefCitation id="4E09D1AA9F16E32A04EFFEE9FE9F2830" author="Stanley, S. M." box="[158,311,332,357]" pageId="15" pageNumber="16" pagination="1 - 296" refId="ref40700" refString="Stanley, S. M. (1970) Relation of shell form to life habits of the Bivalvia (Mollusca). The Geological Society of America Memoir, 125, 1 - 296. http: // dx. doi. org / 10.1130 / mem 125 - p 1" type="journal article" year="1970">Stanley 1970</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |