159 lines
15 KiB
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159 lines
15 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="AD4D9054CD496A4BF0CC4594FC33F915" 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="Geisonoceras Hyatt 1884" docType="treatment" docVersion="6" lastPageNumber="46" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="46" 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.3815188" ID-GBIF-Taxon="163977234" ID-Zenodo-Dep="3815188" LSID="urn:lsid:plazi:treatment:AD4D9054CD496A4BF0CC4594FC33F915" httpUri="http://treatment.plazi.org/id/AD4D9054CD496A4BF0CC4594FC33F915" lastPageNumber="46" pageId="45" pageNumber="46">
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<subSubSection box="[684,904,702,728]" pageId="45" pageNumber="46" type="nomenclature">
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<paragraph blockId="45.[684,904,702,763]" box="[684,904,702,728]" pageId="45" pageNumber="46">
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<heading box="[684,904,702,728]" centered="true" fontSize="11" level="2" pageId="45" pageNumber="46" reason="2">
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<emphasis bold="true" box="[684,904,702,728]" pageId="45" pageNumber="46">
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<emphasis bold="true" box="[684,861,702,728]" italics="true" pageId="45" pageNumber="46">
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<taxonomicName authorityName="Hyatt" authorityYear="1884" box="[684,849,702,728]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="45" pageNumber="46" phylum="Mollusca" rank="genus">Geisonoceras</taxonomicName>
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?
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</emphasis>
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sp.
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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="[742,846,737,763]" pageId="45" pageNumber="46" type="description">
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<paragraph blockId="45.[684,904,702,763]" box="[742,846,737,763]" pageId="45" pageNumber="46">
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<figureCitation box="[742,846,737,763]" captionStart="Fig" captionStartId="46.[189,232,1730,1756]" captionTargetBox="[212,1353,451,1667]" captionTargetId="figure@46.[211,1376,451,1689]" captionTargetPageId="46" captionText="Fig. 23. Orthocerida of the Boda Limestone. A. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo 150126, holotype, Osmundsberget. B. Isorthoceras suave (Angelin inAngelin & Lindström, 1880) comb. nov.,PMU26835,Kallholn.C.Isorthocerasjunceum(Hall,1847),PMU26833,Kallholn.D-E.Isorthoceras cf. elongatocinctum (Portlock, 1843), Kallholn. D. PMU 26814, juvenile growth stage. E. PMU 26825, larger specimen with irregularly spaced transverse ornamentation. F. Isorthoceras curvilineatum sp. nov., PMU26787,holotype,Osmundsberget.G.Isorthocerasangelinisp.nov.,PMU26774,holotype,Kallholn. H. Geisonoceras? sp., PMU 26758, Kallholn. I. Isorthoceras heroyense (Strand, 1934) comb. nov., PMU 26831, Kallholn. Scale bars: A = 10 mm; B-I = 10 mm." figureDoi="http://doi.org/10.5281/zenodo.3814271" httpUri="https://zenodo.org/record/3814271/files/figure.png" pageId="45" pageNumber="46">Fig. 23H</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="materials_examined">
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<paragraph blockId="45.[189,298,802,828]" box="[189,298,802,828]" pageId="45" pageNumber="46">
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<heading bold="true" box="[189,298,802,828]" fontSize="11" level="3" pageId="45" pageNumber="46" reason="3">
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<emphasis bold="true" box="[189,298,802,828]" pageId="45" pageNumber="46">Material</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="45.[189,1398,849,910]" pageId="45" pageNumber="46">
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<accessionNumber box="[189,335,849,876]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26758" pageId="45" pageNumber="46">
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<collectionCode box="[189,253,850,876]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="45" pageNumber="46">PMU</collectionCode>
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26758
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</accessionNumber>
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, from Kallholn, Siljan District,
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<collectingCountry box="[705,801,849,875]" name="Sweden" pageId="45" pageNumber="46">Sweden</collectingCountry>
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, Boda Limestone, Boda Core Member, late Katian, Ordovician.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="description">
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<paragraph blockId="45.[189,334,950,976]" box="[189,334,950,976]" pageId="45" pageNumber="46">
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<heading bold="true" box="[189,334,950,976]" fontSize="11" level="3" pageId="45" pageNumber="46" reason="3">
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<emphasis bold="true" box="[189,334,950,976]" pageId="45" pageNumber="46">Description</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="45.[189,1399,996,1199]" pageId="45" pageNumber="46">
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The specimen represents the juvenile part of a phragmocone
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<quantity box="[917,1001,996,1023]" metricMagnitude="-2" metricUnit="m" metricValue="4.5" pageId="45" pageNumber="46" unit="mm" value="45.0">45 mm</quantity>
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long, having a diameter of
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<quantity metricMagnitude="-3" metricUnit="m" metricValue="6.65" metricValueMax="8.3" metricValueMin="5.0" pageId="45" pageNumber="46" unit="mm" value="6.65" valueMax="8.3" valueMin="5.0">5–8.3 mm</quantity>
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(angle of expansion 4.4°), and a circular conch cross section. The shell is ornamented with obliquely transverse adorally imbricated striae (
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<figureCitation box="[633,743,1067,1093]" captionStart="Fig" captionStartId="46.[189,232,1730,1756]" captionTargetBox="[212,1353,451,1667]" captionTargetId="figure@46.[211,1376,451,1689]" captionTargetPageId="46" captionText="Fig. 23. Orthocerida of the Boda Limestone. A. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo 150126, holotype, Osmundsberget. B. Isorthoceras suave (Angelin inAngelin & Lindström, 1880) comb. nov.,PMU26835,Kallholn.C.Isorthocerasjunceum(Hall,1847),PMU26833,Kallholn.D-E.Isorthoceras cf. elongatocinctum (Portlock, 1843), Kallholn. D. PMU 26814, juvenile growth stage. E. PMU 26825, larger specimen with irregularly spaced transverse ornamentation. F. Isorthoceras curvilineatum sp. nov., PMU26787,holotype,Osmundsberget.G.Isorthocerasangelinisp.nov.,PMU26774,holotype,Kallholn. H. Geisonoceras? sp., PMU 26758, Kallholn. I. Isorthoceras heroyense (Strand, 1934) comb. nov., PMU 26831, Kallholn. Scale bars: A = 10 mm; B-I = 10 mm." figureDoi="http://doi.org/10.5281/zenodo.3814271" httpUri="https://zenodo.org/record/3814271/files/figure.png" pageId="45" pageNumber="46">Fig. 23H</figureCitation>
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). Adorally the conch widens at each stria, which results in an annulated pattern with a sharp ridge at the adoral end of each of them. The distance between two successive striae varies widely from
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<quantity box="[637,814,1137,1164]" metricMagnitude="-4" metricUnit="m" metricValue="9.0" metricValueMax="15.0" metricValueMin="3.0" pageId="45" pageNumber="46" unit="mm" value="0.9" valueMax="1.5" valueMin="0.3">0.3 to 1.5 mm</quantity>
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. At the adoral end a trace of a healed predation additionally causes irregularities in the distance of the transverse elements.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="discussion">
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<paragraph blockId="45.[189,303,1238,1264]" box="[189,303,1238,1264]" pageId="45" pageNumber="46">
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<heading bold="true" box="[189,303,1238,1264]" fontSize="11" level="3" pageId="45" pageNumber="46" reason="3">
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<emphasis bold="true" box="[189,303,1238,1264]" pageId="45" pageNumber="46">Remarks</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="45.[189,1399,1284,1487]" pageId="45" pageNumber="46">
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This small specimen might represent the juvenile stage of
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<taxonomicName authority="(Angelin in Angelin & Lindstrom, 1880)" authorityName="Kröger" authorityYear="2013" baseAuthorityName="Angelin in Angelin & Lindstrom" baseAuthorityYear="1880" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="45" pageNumber="46" phylum="Mollusca" rank="species" species="wegelini" status="comb. nov.">
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<emphasis box="[884,1152,1284,1311]" italics="true" pageId="45" pageNumber="46">Geisonoceras wegelini</emphasis>
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(Angelin
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<emphasis box="[1274,1297,1285,1310]" italics="true" pageId="45" pageNumber="46">in</emphasis>
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<bibRefCitation author="Angelin N. P. & Lindstrom G." pageId="45" pageNumber="46" refId="ref46414" refString="Angelin N. P. & Lindstrom G. 1880. Fragmenta Silurica. Samson and Wallin, Stockholm." type="book" year="1880">Angelin & Lindström, 1880</bibRefCitation>
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)
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</taxonomicName>
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<taxonomicNameLabel box="[448,583,1319,1346]" pageId="45" pageNumber="46" rank="species">comb. nov.</taxonomicNameLabel>
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Only relatively large fragments of
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<taxonomicName authorityName="Kröger" authorityYear="2013" baseAuthorityName="Angelin in Angelin & Lindstrom" baseAuthorityYear="1880" box="[1027,1168,1320,1346]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="45" pageNumber="46" phylum="Mollusca" rank="species" species="wegelini">
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<emphasis box="[1027,1048,1320,1346]" italics="true" pageId="45" pageNumber="46">G</emphasis>
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.
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<emphasis box="[1069,1168,1320,1346]" italics="true" pageId="45" pageNumber="46">wegelini</emphasis>
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</taxonomicName>
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are known. These fragments are ornamented with obliquely transverse bands with highly irregular spacing. The pattern of ornamentation of
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<taxonomicName authorityName="Kröger" authorityYear="2013" baseAuthorityName="Angelin in Angelin & Lindstrom" baseAuthorityYear="1880" box="[398,533,1390,1416]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="45" pageNumber="46" phylum="Mollusca" rank="species" species="wegelini" status="comb. nov.">
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<emphasis box="[398,419,1390,1416]" italics="true" pageId="45" pageNumber="46">G</emphasis>
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.
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<emphasis box="[434,533,1390,1416]" italics="true" pageId="45" pageNumber="46">wegelini</emphasis>
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</taxonomicName>
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<taxonomicNameLabel box="[541,670,1390,1416]" pageId="45" pageNumber="46" rank="species">comb. nov.</taxonomicNameLabel>
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resembles that of specimen
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<accessionNumber box="[1004,1151,1390,1417]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26758" pageId="45" pageNumber="46">PMU 26758</accessionNumber>
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, but is shallower and not imbricated. Both forms are interpreted as separate species, because intermediate growth stages are not available for further study.
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</paragraph>
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<paragraph blockId="45.[189,344,1526,1552]" box="[189,344,1526,1552]" pageId="45" pageNumber="46">
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<heading bold="true" box="[189,344,1526,1552]" fontSize="11" level="3" pageId="45" pageNumber="46" reason="3">
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<emphasis bold="true" box="[189,344,1526,1552]" pageId="45" pageNumber="46">Comparison</emphasis>
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</heading>
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</paragraph>
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<paragraph blockId="45.[189,1399,1572,1704]" pageId="45" pageNumber="46">
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The specimen
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<accessionNumber box="[360,504,1572,1599]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26758" pageId="45" pageNumber="46">PMU 26758</accessionNumber>
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differs from known juvenile specimen of
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<taxonomicName authority="(Portlock, 1843)" baseAuthorityName="Portlock" baseAuthorityYear="1843" class="Cephalopoda" family="Tarphycerida (awaiting allocation)" genus="Tyrioceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Tarphycerida" pageId="45" pageNumber="46" phylum="Mollusca" rank="species" species="subannulare">
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<emphasis box="[997,1275,1572,1598]" italics="true" pageId="45" pageNumber="46">Tyrioceras subannulare</emphasis>
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(
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<bibRefCitation author="Portlock J. E." pageId="45" pageNumber="46" refId="ref48871" refString="Portlock J. E. 1843. Report on the Geology of the County of Londonderry and of parts of Tyrone and Fermanagh. Andrew Milliken, Dublin." type="book" year="1843">Portlock, 1843</bibRefCitation>
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)
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</taxonomicName>
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(see
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<bibRefCitation author="Evans D. H." box="[317,455,1608,1634]" pageId="45" pageNumber="46" pagination="155 - 189" refId="ref47281" refString="Evans D. H. 1993. The cephalopod fauna of the Killey Bridge Formation (Ordovician, Ashgill), Pomeroy, County Tyrone. Irish Journal of Earth Sciences 12: 155 - 189." type="journal article" year="1993">Evans 1993</bibRefCitation>
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) and from
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<taxonomicName authority="(Blake, 1882)" baseAuthorityName="Blake" baseAuthorityYear="1882" box="[582,1054,1607,1634]" class="Cephalopoda" family="Cephalopoda (awaiting allocation)" genus="Imbricatoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Cephalopoda (awaiting allocation)" pageId="45" pageNumber="46" phylum="Mollusca" rank="species" species="ascendens">
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<emphasis box="[582,888,1607,1633]" italics="true" pageId="45" pageNumber="46">Imbricatoceras ascendens</emphasis>
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(
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<bibRefCitation author="Blake J. F. A." box="[902,1046,1607,1634]" pageId="45" pageNumber="46" refId="ref46808" refString="Blake J. F. A. 1882. Monograph of the British Fossil Cephalopoda, Part 1, Introduction and Silurian species. John Van Voorst, London." type="book" year="1882">Blake, 1882</bibRefCitation>
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)
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</taxonomicName>
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(see
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<bibRefCitation author="Holland C. H." box="[1114,1275,1607,1634]" pageId="45" pageNumber="46" pagination="37 - 44" refId="ref48053" refString="Holland C. H. 1993. Nautiloid Cephalopods of the Kildare Limestone (Ashgill), Ireland. Geological Journal 28: 37 - 44. http: // dx. doi. org / 10.1002 / gj. 3350280104" type="journal article" year="1993">
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<collectingCountry box="[1114,1209,1607,1633]" name="Netherlands" pageId="45" pageNumber="46">Holland</collectingCountry>
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1993
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</bibRefCitation>
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) in having a strongly irregularly spaced transverse ornamentation. Known species of
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<emphasis box="[1059,1209,1643,1669]" italics="true" pageId="45" pageNumber="46">Thyriocerias</emphasis>
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differ in having a curved and more regularly spaced transverse ornamentation.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |