116 lines
10 KiB
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116 lines
10 KiB
XML
<document ID-DOI="http://dx.doi.org/10.5852/ejt.2013.41" ID-GBIF-Dataset="386010a0-6da4-4fa3-9d1a-4b3b5427cac5" ID-ISSN="2118-9773" ID-Zenodo-Dep="3814221" ID-ZooBank="A2F1B9ED-870A-466E-B35E-BD5DA782476E" checkinTime="1588881240389" checkinUser="carolina" docAuthor="Kröger, Björn" docDate="2013" docId="AD4D9054CD356A37F0C84620FE91FBE0" docLanguage="en" docName="ejt-2013-41.pdf.imf" docOrigin="European Journal of Taxonomy 41" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.12:EJT.2018-.journal_article" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article" docStyleVersion="12" docTitle="Siljanoceras Kröger 2013" docType="treatment" docVersion="6" lastPageNumber="82" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="82" updateTime="1634716833028" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-3.0" zenodo-license-figures="CC-BY-3.0" zenodo-license-treatments="UNSPECIFIED">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Kröger, Björn</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>European Journal of Taxonomy</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2013</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2013-03-27</mods:number>
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</mods:detail>
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<mods:detail type="issue">
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<mods:number>41</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>110</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.5852/ejt.2013.41</mods:identifier>
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<mods:identifier type="GBIF-Dataset">386010a0-6da4-4fa3-9d1a-4b3b5427cac5</mods:identifier>
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<mods:identifier type="ISSN">2118-9773</mods:identifier>
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<mods:identifier type="Zenodo-Dep">3814221</mods:identifier>
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<mods:identifier type="ZooBank">A2F1B9ED-870A-466E-B35E-BD5DA782476E</mods:identifier>
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</mods:mods>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.3815190" ID-GBIF-Taxon="163977201" ID-Zenodo-Dep="3815190" LSID="urn:lsid:plazi:treatment:AD4D9054CD356A37F0C84620FE91FBE0" httpUri="http://treatment.plazi.org/id/AD4D9054CD356A37F0C84620FE91FBE0" lastPageNumber="82" pageId="81" pageNumber="82">
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<subSubSection box="[680,907,266,293]" pageId="81" pageNumber="82" type="nomenclature">
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<paragraph blockId="81.[680,907,266,328]" box="[680,907,266,293]" pageId="81" pageNumber="82">
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<heading box="[680,907,266,293]" centered="true" fontSize="11" level="2" pageId="81" pageNumber="82" reason="2">
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<emphasis bold="true" box="[680,907,266,293]" pageId="81" pageNumber="82">
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<taxonomicName authorityName="Kröger" authorityYear="2013" box="[680,830,266,293]" class="Cephalopoda" family="Uranoceratidae" genus="Siljanoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Barrandeocerida" pageId="81" pageNumber="82" phylum="Mollusca" rank="genus">
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<emphasis bold="true" box="[680,830,266,293]" italics="true" pageId="81" pageNumber="82">Siljanoceras</emphasis>
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</taxonomicName>
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sp. A.
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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 box="[703,884,302,328]" pageId="81" pageNumber="82" type="description">
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<paragraph blockId="81.[680,907,266,328]" box="[703,884,302,328]" pageId="81" pageNumber="82">
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<figureCitation box="[703,791,302,328]" captionStart="Fig" captionStartId="79.[189,232,1819,1845]" captionTargetBox="[189,1397,525,1777]" captionTargetId="figure@79.[189,1397,525,1776]" captionTargetPageId="79" captionText="Fig. 36. Polished median sections of Siljanoceras gen. nov., Boda Limestone. A. Detail of siphuncular segment of Siljanoceras sp. A, PMU 26917, Kallholn. B. Same specimen, total view. C. Siljanoceras varians sp. nov., PMU 26915, Kallholn; detail of apical-most siphuncular segment, section not perfectly in median plane, with adapical septal perforation not preserved. D. Same specimen, total view. Scale bars: A, C = 1 mm; B, D = 5 mm." figureDoi="http://doi.org/10.5281/zenodo.3814299" httpUri="https://zenodo.org/record/3814299/files/figure.png" pageId="81" pageNumber="82">Figs 36</figureCitation>
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A-B, 38
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</paragraph>
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</subSubSection>
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<subSubSection pageId="81" pageNumber="82" type="materials_examined">
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<paragraph blockId="81.[189,298,367,393]" box="[189,298,367,393]" pageId="81" pageNumber="82">
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<heading bold="true" box="[189,298,367,393]" fontSize="11" level="3" pageId="81" pageNumber="82" reason="3">
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<emphasis bold="true" box="[189,298,367,393]" pageId="81" pageNumber="82">Material</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="81.[189,1398,414,475]" pageId="81" pageNumber="82">
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One specimen (
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<accessionNumber box="[372,523,414,441]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26917" pageId="81" pageNumber="82">
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<collectionCode box="[372,438,414,440]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="81" pageNumber="82">PMU</collectionCode>
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26917
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</accessionNumber>
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), Kallholn, Siljan District,
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<collectingCountry box="[841,938,414,440]" name="Sweden" pageId="81" pageNumber="82">Sweden</collectingCountry>
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; Boda Limestone, Boda Core Member, late Katian.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="81" pageNumber="82" type="description">
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<paragraph blockId="81.[189,334,514,540]" box="[189,334,514,540]" pageId="81" pageNumber="82">
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<heading bold="true" box="[189,334,514,540]" fontSize="11" level="3" pageId="81" pageNumber="82" reason="3">
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<emphasis bold="true" box="[189,334,514,540]" pageId="81" pageNumber="82">Description</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="81.[189,1399,561,729]" pageId="81" pageNumber="82">
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Specimen
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<accessionNumber box="[311,454,561,588]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26917" pageId="81" pageNumber="82">PMU 26917</accessionNumber>
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is a mildly deformed portion of a slightly curved phragmocone,
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<quantity box="[1201,1282,561,588]" metricMagnitude="-2" metricUnit="m" metricValue="2.3" pageId="81" pageNumber="82" unit="mm" value="23.0">23 mm</quantity>
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long with a conch height of ca.
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<quantity box="[441,568,597,623]" metricMagnitude="-2" metricUnit="m" metricValue="3.1" metricValueMax="4.0" metricValueMin="2.2" pageId="81" pageNumber="82" unit="mm" value="31.0" valueMax="40.0" valueMin="22.0">22–40 mm</quantity>
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and a conch width of ca.
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<quantity box="[870,997,597,623]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" metricValueMax="4.0" metricValueMin="2.0" pageId="81" pageNumber="82" unit="mm" value="30.0" valueMax="40.0" valueMin="20.0">20–40 mm</quantity>
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(angle of expansion ca. 38°) (
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<figureCitation captionStart="Fig" captionStartId="79.[189,232,1819,1845]" captionTargetBox="[189,1397,525,1777]" captionTargetId="figure@79.[189,1397,525,1776]" captionTargetPageId="79" captionText="Fig. 36. Polished median sections of Siljanoceras gen. nov., Boda Limestone. A. Detail of siphuncular segment of Siljanoceras sp. A, PMU 26917, Kallholn. B. Same specimen, total view. C. Siljanoceras varians sp. nov., PMU 26915, Kallholn; detail of apical-most siphuncular segment, section not perfectly in median plane, with adapical septal perforation not preserved. D. Same specimen, total view. Scale bars: A, C = 1 mm; B, D = 5 mm." figureDoi="http://doi.org/10.5281/zenodo.3814299" httpUri="https://zenodo.org/record/3814299/files/figure.png" pageId="81" pageNumber="82">Fig. 36A, B</figureCitation>
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). The original shape of the conch cross section is difficult to evaluate, but was probably slightly depressed. The conch surface is poorly preserved and no signs of ornamentation are visible. The sutures are nearly transverse and have a distance of ca. 0.17 of the corresponding conch cross section.
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</paragraph>
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<paragraph blockId="81.[189,1399,767,864]" pageId="81" pageNumber="82">The position of the septal perforation is eccentric (SPR 0.4). The siphuncular segments are barrel-shaped and widely expanded with maximum diameter of ca. 0.18 of the corresponding conch cross section. The septal necks are achoanitic.</paragraph>
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</subSubSection>
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<subSubSection pageId="81" pageNumber="82" type="discussion">
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<paragraph blockId="81.[189,303,903,929]" box="[189,303,903,929]" pageId="81" pageNumber="82">
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<heading bold="true" box="[189,303,903,929]" fontSize="11" level="3" pageId="81" pageNumber="82" reason="3">
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<emphasis bold="true" box="[189,303,903,929]" pageId="81" pageNumber="82">Remarks</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="81.[189,1399,950,1117]" pageId="81" pageNumber="82">
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This fragmentarily preserved specimen differs from
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<taxonomicName authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[817,1061,950,976]" class="Cephalopoda" family="Uranoceratidae" genus="Siljanoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Barrandeocerida" pageId="81" pageNumber="82" phylum="Mollusca" rank="species" species="varians" status="gen. et sp. nov.">
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<emphasis box="[817,1061,950,976]" italics="true" pageId="81" pageNumber="82">Siljanoceras varians</emphasis>
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</taxonomicName>
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<taxonomicNameLabel box="[1071,1254,950,976]" pageId="81" pageNumber="82" rank="species">gen. et sp. nov.</taxonomicNameLabel>
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in having a less curved, more expanded conch with a less eccentric siphuncle, that appears slightly more expanded within the shell. The general conch form is similar to that of
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<taxonomicName authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[917,1064,1020,1046]" class="Cephalopoda" family="Uranoceratidae" genus="Siljanoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Barrandeocerida" pageId="81" pageNumber="82" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis box="[917,1064,1020,1046]" italics="true" pageId="81" pageNumber="82">Siljanoceras</emphasis>
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</taxonomicName>
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<taxonomicNameLabel box="[1072,1180,1021,1047]" pageId="81" pageNumber="82" rank="genus">gen. nov.</taxonomicNameLabel>
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and it is therefore assigned to this genus. However, a species determination is impossible based on this imperfectly known specimen.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |