167 lines
24 KiB
XML
167 lines
24 KiB
XML
<document id="458B0A7E2E36230C21CD90221FA9B49E" ID-CLB-Dataset="22319" ID-DOI="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" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1588881240389" checkinUser="carolina" docAuthor="Kröger, Björn" docDate="2013" docId="AD4D9054CD4D6A4CF03345BCFBBDFE2B" docLanguage="en" docName="ejt-2013-41.pdf.imf" docOrigin="European Journal of Taxonomy 41" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.14:EJT.2018-.journal_article.type1" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article.type1" docStyleVersion="14" docTitle="Nathorstoceras adnatum Kröger 2013, sp. nov." docType="treatment" docUuid="58064C88-D4A3-4CA4-B6EA-DE719EE0F724" docUuidSource="ZooBank" docVersion="9" lastPageNumber="43" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="42" updateTime="1698838944441" 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:title id="9A7C74685FA386E65F2410B921BAFB5C">The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
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<mods:name id="55735384F992A0D12AD4FC1D0B03D0A0" type="personal">
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<mods:namePart id="07AA2D5D4E56BE96D238FFB2C1587EB8">Kröger, Björn</mods:namePart>
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<mods:title id="58E966569AE5545C35ACBBCA13B33E12">European Journal of Taxonomy</mods:title>
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<mods:part id="071C01F363A54F2AD963422AE5E5753C">
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<mods:date id="74F1A5B5F0EB76D440AFE48542914829">2013</mods:date>
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<mods:number id="A83923FE5E36924B99719B27F2526BD2">2013-03-27</mods:number>
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<mods:number id="1AEEFF67DB80FC44E823A5758696F4DC">41</mods:number>
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<treatment id="AD4D9054CD4D6A4CF03345BCFBBDFE2B" ID-DOI="http://doi.org/10.5281/zenodo.3815182" ID-GBIF-Taxon="163977238" ID-Zenodo-Dep="3815182" LSID="urn:lsid:zoobank.org:act:58064C88-D4A3-4CA4-B6EA-DE719EE0F724" httpUri="http://treatment.plazi.org/id/AD4D9054CD4D6A4CF03345BCFBBDFE2B" lastPageId="42" lastPageNumber="43" pageId="41" pageNumber="42">
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<subSubSection id="6DFE72C9CD4D6A4FF03345BCFB6CFD69" pageId="41" pageNumber="42" type="nomenclature">
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<paragraph id="255B2142CD4D6A4FF03345BCFC45FD0C" blockId="41.[362,1225,662,759]" box="[595,992,662,689]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF03345BCFC45FD0C" box="[595,992,662,689]" centered="true" fontSize="11" level="2" pageId="41" pageNumber="42" reason="2">
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<taxonomicName id="E2E45AC1CD4D6A4FF03345BCFCDAFD0C" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[595,895,662,689]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="41" pageNumber="42" phylum="Mollusca" rank="species" species="adnatum" status="sp. nov.">
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<emphasis id="1790FD50CD4D6A4FF03345BCFCDAFD0C" bold="true" box="[595,895,662,689]" italics="true" pageId="41" pageNumber="42">Nathorstoceras adnatum</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="0CA3402BCD4D6A4FF1E645BDFC45FD0C" box="[902,992,663,689]" pageId="41" pageNumber="42" rank="species">sp. nov.</taxonomicNameLabel>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF30A4593FB6CFD69" blockId="41.[362,1225,662,759]" box="[362,1225,697,724]" pageId="41" pageNumber="42">
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urn:lsid:zoobank.org:act:
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<uuid id="51421B97CD4D6A4FF0E74593FB6CFD69" box="[647,1225,697,724]" pageId="41" pageNumber="42">58064C88-D4A3-4CA4-B6EA-DE719EE0F724</uuid>
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</uri>
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD4D6A4FF00645F7FC68FD4A" box="[614,973,733,759]" pageId="41" pageNumber="42" type="description">
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<paragraph id="255B2142CD4D6A4FF00645F7FC68FD4A" blockId="41.[362,1225,662,759]" box="[614,973,733,759]" pageId="41" pageNumber="42">
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<figureCitation id="BDDF3DC7CD4D6A4FF00645F7FD76FD4A" box="[614,723,733,759]" captionStart="Fig" captionStartId="20.[189,232,1658,1684]" captionTargetBox="[194,1391,891,1606]" captionTargetPageId="20" captionText="Fig. 10. Camera lucida drawings of cross sections of selected Boda Limestone cephalopods. A. Cyrtorizoceras thorslundi sp. nov., PMU 26657, Osmundsberget, mature body chamber. B. Tyrioceras cf. kjaerulfi Strand, 1934, PMU 26897, Kallholn. C. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. D. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype. E. Redpathoceras depressum sp. nov., PMU 26927, holotype, Kallholn, cross section of base of mature truncated conch. F. Schuchertoceras fryi sp. nov., PMU 24744, holotype, Kalllholn, cross section of mature aperture (dark grey) and body chamber (medium grey). G. Redpathoceras bullatum sp. nov., PMU 26923, holotype, Kallholn, cross section of base of mature truncated conch. Prosiphuncular side directed downward in all figures. Siphuncles shown as white circles. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814243" httpUri="https://zenodo.org/record/3814243/files/figure.png" pageId="41" pageNumber="42">Figs 10C</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD4D6A4FF08045F7FCABFD4A" box="[736,782,733,759]" captionStart="Fig" captionStartId="26.[190,233,1753,1779]" captionTargetBox="[243,1344,265,1707]" captionTargetId="figure@26.[243,1344,265,1707]" captionTargetPageId="26" captionText="Fig. 13. Polished median sections of Orthocerida of the Boda Limestone. A. Dawsonoceras fenestratum (Eichwald, 1860), PMU 26706, Kallholn. B-C. Striatocycloceras isbergi sp. nov. B. PMU 26681, Kallholn. C. PMU 26661, Osmundsberget. D. Isorthoceras angelini sp. nov., PMU 26784, Kallholn. E. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, Kallholn. F. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. G. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo, 190102c, Osmundsberget.H.Ordogeisonocerasfoerstei(Strand,1934)comb.nov.,PMU26763,Kallholn. I. Geisonoceras wegelini (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26740, Kallholn. Scale bars: A-D, I = 1 mm; E-H = 5 mm." figureDoi="http://doi.org/10.5281/zenodo.3814251" httpUri="https://zenodo.org/record/3814251/files/figure.png" pageId="41" pageNumber="42">13F</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD4D6A4FF17A45F7FCEAFD4A" box="[794,847,733,759]" captionStart="Fig" captionStartId="38.[189,232,1790,1816]" captionTargetBox="[199,1385,265,1725]" captionTargetId="figure@38.[199,1385,265,1747]" captionTargetPageId="38" captionText="Fig. 19. Orthocerida of the Boda Limestone. A. Nathorstoceras adnatum sp. nov., PMU d1440, holotype, Kallholn, lateral view. B-C. Nathorstoceras kallholnense sp. nov., PMU 26730, Kallholn, complete body chamber. B. Lateral view. C. view from prosiphuncular side. D. Geisonoceras wegelini (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26747, Unskarsheden, lateral view. E. Ordogeisonoceras foerstei (Strand, 1934) comb. nov., PMU 26762, Kallholn, lateral view. F. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, lateral view, note siphuncle on left side. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814263" httpUri="https://zenodo.org/record/3814263/files/figure.png" pageId="41" pageNumber="42">19A</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD4D6A4FF13B45F7FC35FD4A" box="[859,912,733,759]" captionStart="Fig" captionStartId="40.[189,232,1917,1943]" captionTargetBox="[474,1114,265,1870]" captionTargetId="figure@40.[474,1114,265,1864]" captionTargetPageId="40" captionText="Fig. 20. Polished median sections of Nathorstoceras sp. nov., Kallholn, Boda Limestone. A. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. B. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, Kallholn. Scale bar = 10 mm for both figures." figureDoi="http://doi.org/10.5281/zenodo.3814265" httpUri="https://zenodo.org/record/3814265/files/figure.png" pageId="41" pageNumber="42">20A</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD4D6A4FF1FC45F7FC68FD4A" box="[924,973,733,759]" captionStart="Fig" captionStartId="42.[189,232,1855,1881]" captionTargetBox="[191,1399,881,1797]" captionTargetId="graphics@42.[481,846,878,1727]" captionTargetPageId="42" captionText="Fig. 21. Reconstruction of the details of the septal necks and connecting ring of Nathorstoceras sp. nov., Kallholn, Boda Limestone. A. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype. B. Nathorstoceras adnatum sp. nov., PMU 26733, holotype." figureDoi="http://doi.org/10.5281/zenodo.3814267" httpUri="https://zenodo.org/record/3814267/files/figure.png" pageId="41" pageNumber="42">21B</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD4D6A4FF2DD4434FDC6FBE0" pageId="41" pageNumber="42" type="diagnosis">
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<paragraph id="255B2142CD4D6A4FF2DD4434FE93FC85" blockId="41.[189,310,798,824]" box="[189,310,798,824]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF2DD4434FE93FC85" bold="true" box="[189,310,798,824]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
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<emphasis id="1790FD50CD4D6A4FF2DD4434FE93FC85" bold="true" box="[189,310,798,824]" pageId="41" pageNumber="42">Diagnosis</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF2DD4467FDC6FBE0" blockId="41.[189,1399,845,1117]" pageId="41" pageNumber="42">
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<taxonomicName id="E2E45AC1CD4D6A4FF2DD4467FED7FCDA" authorityName="Kröger" authorityYear="2013" box="[189,370,845,871]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="41" pageNumber="42" phylum="Mollusca" rank="genus">
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<emphasis id="1790FD50CD4D6A4FF2DD4467FED7FCDA" box="[189,370,845,871]" italics="true" pageId="41" pageNumber="42">Nathorstoceras</emphasis>
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</taxonomicName>
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with nearly straight and very weakly annulated conch with angle of expansion of 8°; annulations more pronounced in late growth stages; shell ornamented with regularly spaced transverse lirae and distance between annulations ca. 0.2 of corresponding conch height; annuli and lirae form shallow sinus on prosiphuncular side; conch cross section compressed with width/height ratio of ca. 0.8; septal distance ca. 0.24 of corresponding conch height; siphuncle subcentral with SPR 0.41; septal perforation with diameter of ca. 0.05 of corresponding conch height; siphuncular segments abruptly expanded at septal foramen with maximum diameter of ca. 0.14 of corresponding conch cross section; endosiphuncular deposits unknown.
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD4D6A4FF2DD43AFFBE2FB70" box="[189,1095,1157,1230]" pageId="41" pageNumber="42" type="etymology">
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<paragraph id="255B2142CD4D6A4FF2DD43AFFEE1FB22" blockId="41.[189,324,1157,1183]" box="[189,324,1157,1183]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF2DD43AFFEE1FB22" bold="true" box="[189,324,1157,1183]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
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<emphasis id="1790FD50CD4D6A4FF2DD43AFFEE1FB22" bold="true" box="[189,324,1157,1183]" pageId="41" pageNumber="42">Etymology</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF2DD4399FBE2FB70" blockId="41.[189,1095,1203,1230]" box="[189,1095,1203,1230]" pageId="41" pageNumber="42">Refers to the strongly expanded, adnate siphuncular segments of this species.</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD4D6A4FF2DD43DFFA94FA10" pageId="41" pageNumber="42" type="materials_examined">
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<materialsCitation id="958C2B1FCD4D6A4FF2DD43DFFEF0FA80" ID-GBIF-Occurrence="2610779301" box="[189,341,1269,1342]" collectionCode="PMU" pageId="41" pageNumber="42" specimenCode="PMU 26733" specimenCount="1" typeStatus="holotype">
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<paragraph id="255B2142CD4D6A4FF2DD43DFFE8AFAB2" blockId="41.[189,303,1269,1295]" box="[189,303,1269,1295]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF2DD43DFFE8AFAB2" bold="true" box="[189,303,1269,1295]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
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<emphasis id="1790FD50CD4D6A4FF2DD43DFFE8AFAB2" bold="true" box="[189,303,1269,1295]" pageId="41" pageNumber="42">
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<typeStatus id="FA5F9FE0CD4D6A4FF2DD43DFFE8AFAB2" box="[189,303,1269,1295]" pageId="41" pageNumber="42" type="holotype">Holotype</typeStatus>
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</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF2DD420EFEF0FA80" blockId="41.[189,341,1315,1342]" box="[189,341,1315,1342]" pageId="41" pageNumber="42">
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<specimenCode id="75428939CD4D6A4FF2DD420EFEF4FA80" box="[189,337,1315,1342]" pageId="41" pageNumber="42">PMU 26733</specimenCode>
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.
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</paragraph>
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</materialsCitation>
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<paragraph id="255B2142CD4D6A4FF2DD424FFE5EFAC3" blockId="41.[189,507,1380,1407]" box="[189,507,1380,1407]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF2DD424FFE5EFAC3" bold="true" box="[189,507,1380,1407]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
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<emphasis id="1790FD50CD4D6A4FF2DD424FFE5EFAC3" bold="true" box="[189,507,1380,1407]" pageId="41" pageNumber="42">Type locality and horizon</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF2DD42B9FA94FA10" blockId="41.[189,1329,1427,1453]" box="[189,1329,1427,1453]" pageId="41" pageNumber="42">
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Kallholn, Siljan District,
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<collectingCountry id="5DF361D2CD4D6A4FF38542B9FDE0FA10" box="[485,581,1427,1453]" name="Sweden" pageId="41" pageNumber="42">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 id="6DFE72C9CD4D6A4CF2DD42FEFBBDFE2B" lastPageId="42" lastPageNumber="43" pageId="41" pageNumber="42" type="description">
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<paragraph id="255B2142CD4D6A4FF2DD42FEFEEBFA53" blockId="41.[189,334,1492,1518]" box="[189,334,1492,1518]" pageId="41" pageNumber="42">
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<heading id="7E13962ECD4D6A4FF2DD42FEFEEBFA53" bold="true" box="[189,334,1492,1518]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
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<emphasis id="1790FD50CD4D6A4FF2DD42FEFEEBFA53" bold="true" box="[189,334,1492,1518]" pageId="41" pageNumber="42">Description</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD4D6A4FF2DD4129FAAEF81C" blockId="41.[189,1399,1539,1953]" pageId="41" pageNumber="42">
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The specimen is a portion of phragmocone ca.
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<quantity id="E21C8CA7CD4D6A4FF0884129FC9EF9A3" box="[744,827,1539,1566]" metricMagnitude="-2" metricUnit="m" metricValue="5.0" pageId="41" pageNumber="42" unit="mm" value="50.0">50 mm</quantity>
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long, with a height of
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<quantity id="E21C8CA7CD4D6A4FF6284129FB6DF9A3" box="[1096,1224,1539,1566]" metricMagnitude="-2" metricUnit="m" metricValue="4.05" metricValueMax="4.4" metricValueMin="3.7" pageId="41" pageNumber="42" unit="mm" value="40.5" valueMax="44.0" valueMin="37.0">37–44 mm</quantity>
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and a width at the adoral end of
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<quantity id="E21C8CA7CD4D6A4FF3EA410CFE79F9FC" box="[394,476,1574,1601]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="41" pageNumber="42" unit="mm" value="30.0">30 mm</quantity>
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(width/height ratio 0.81, angle of expansion 8°) (
|
||
<figureCitation id="BDDF3DC7CD4D6A4FF640410CFB2FF9FD" box="[1056,1162,1574,1600]" captionStart="Fig" captionStartId="20.[189,232,1658,1684]" captionTargetBox="[194,1391,891,1606]" captionTargetPageId="20" captionText="Fig. 10. Camera lucida drawings of cross sections of selected Boda Limestone cephalopods. A. Cyrtorizoceras thorslundi sp. nov., PMU 26657, Osmundsberget, mature body chamber. B. Tyrioceras cf. kjaerulfi Strand, 1934, PMU 26897, Kallholn. C. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. D. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype. E. Redpathoceras depressum sp. nov., PMU 26927, holotype, Kallholn, cross section of base of mature truncated conch. F. Schuchertoceras fryi sp. nov., PMU 24744, holotype, Kalllholn, cross section of mature aperture (dark grey) and body chamber (medium grey). G. Redpathoceras bullatum sp. nov., PMU 26923, holotype, Kallholn, cross section of base of mature truncated conch. Prosiphuncular side directed downward in all figures. Siphuncles shown as white circles. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814243" httpUri="https://zenodo.org/record/3814243/files/figure.png" pageId="41" pageNumber="42">Fig. 10C</figureCitation>
|
||
,
|
||
<figureCitation id="BDDF3DC7CD4D6A4FF6F6410CFB6BF9FD" box="[1174,1230,1574,1600]" captionStart="Fig" captionStartId="38.[189,232,1790,1816]" captionTargetBox="[199,1385,265,1725]" captionTargetId="figure@38.[199,1385,265,1747]" captionTargetPageId="38" captionText="Fig. 19. Orthocerida of the Boda Limestone. A. Nathorstoceras adnatum sp. nov., PMU d1440, holotype, Kallholn, lateral view. B-C. Nathorstoceras kallholnense sp. nov., PMU 26730, Kallholn, complete body chamber. B. Lateral view. C. view from prosiphuncular side. D. Geisonoceras wegelini (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26747, Unskarsheden, lateral view. E. Ordogeisonoceras foerstei (Strand, 1934) comb. nov., PMU 26762, Kallholn, lateral view. F. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, lateral view, note siphuncle on left side. Scale bar = 10 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814263" httpUri="https://zenodo.org/record/3814263/files/figure.png" pageId="41" pageNumber="42">19A</figureCitation>
|
||
). The conch is faintly annulated with a distance between two successive annuli of ca. 0.2 of the corresponding conch cross section, and ornamented with pronounced, regularly spaced lirae, with a distance between two subsequent lirae of ca.
|
||
<quantity id="E21C8CA7CD4D6A4FF3A641BAFD8DF917" box="[454,552,1680,1707]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="41" pageNumber="42" unit="mm" value="1.5">1. 5 mm</quantity>
|
||
. The conch is is nearly straight, with a subcentrally positioned siphuncle; at the apical end of the specimen its distance from the conch margin is
|
||
<quantity id="E21C8CA7CD4D6A4FF1814199FB94F973" box="[993,1073,1715,1742]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="41" pageNumber="42" unit="mm" value="15.0">15 mm</quantity>
|
||
(SPR 0.41). The connecting ring is much wider than the septal perforation (
|
||
<figureCitation id="BDDF3DC7CD4D6A4FF08341FCFCF6F94D" box="[739,851,1750,1776]" captionStart="Fig" captionStartId="40.[189,232,1917,1943]" captionTargetBox="[474,1114,265,1870]" captionTargetId="figure@40.[474,1114,265,1864]" captionTargetPageId="40" captionText="Fig. 20. Polished median sections of Nathorstoceras sp. nov., Kallholn, Boda Limestone. A. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. B. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, Kallholn. Scale bar = 10 mm for both figures." figureDoi="http://doi.org/10.5281/zenodo.3814265" httpUri="https://zenodo.org/record/3814265/files/figure.png" pageId="41" pageNumber="42">Figs 20A</figureCitation>
|
||
,
|
||
<figureCitation id="BDDF3DC7CD4D6A4FF10041FCFC31F94D" box="[864,916,1750,1776]" captionStart="Fig" captionStartId="42.[189,232,1855,1881]" captionTargetBox="[191,1399,881,1797]" captionTargetId="graphics@42.[481,846,878,1727]" captionTargetPageId="42" captionText="Fig. 21. Reconstruction of the details of the septal necks and connecting ring of Nathorstoceras sp. nov., Kallholn, Boda Limestone. A. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype. B. Nathorstoceras adnatum sp. nov., PMU 26733, holotype." figureDoi="http://doi.org/10.5281/zenodo.3814267" httpUri="https://zenodo.org/record/3814267/files/figure.png" pageId="41" pageNumber="42">21B</figureCitation>
|
||
). At the adapical end of the specimen the septal perforation is ca.
|
||
<quantity id="E21C8CA7CD4D6A4FF3B341D3FDB3F8A9" box="[467,534,1785,1812]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="41" pageNumber="42" unit="mm" value="2.0">2 mm</quantity>
|
||
and the maximum diameter of the siphuncle is
|
||
<quantity id="E21C8CA7CD4D6A4FF65C41D3FBDAF8A9" box="[1084,1151,1785,1812]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" pageId="41" pageNumber="42" unit="mm" value="5.0">5 mm</quantity>
|
||
(0.05 and 0.14 of the corresponding conch cross section, respectively). The sutures are directly transverse and form shallow lateral lobes. At the adapical end of the specimen the distance between two septa is
|
||
<quantity id="E21C8CA7CD4D6A4FF6A4406AFAA9F8E7" box="[1220,1292,1856,1882]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" pageId="41" pageNumber="42" unit="mm" value="9.0">9 mm</quantity>
|
||
(0.24 of corresponding conch cross section). The septal necks are achoanitic and the siphuncular segments are adnate, abruptly expanded at septal foramen. No cameral and endosiphuncular deposits occur.
|
||
</paragraph>
|
||
<paragraph id="255B2142CD4E6A4CF2DD4621FEFDFE98" blockId="42.[189,344,267,293]" box="[189,344,267,293]" pageId="42" pageNumber="43">
|
||
<heading id="7E13962ECD4E6A4CF2DD4621FEFDFE98" bold="true" box="[189,344,267,293]" fontSize="11" level="3" pageId="42" pageNumber="43" reason="3">
|
||
<emphasis id="1790FD50CD4E6A4CF2DD4621FEFDFE98" bold="true" box="[189,344,267,293]" pageId="42" pageNumber="43">Comparison</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD4E6A4CF2DD4610FC70FEE9" blockId="42.[189,981,313,340]" box="[189,981,313,340]" pageId="42" pageNumber="43">
|
||
See comparison with
|
||
<taxonomicName id="E2E45AC1CD4E6A4CF3DA4613FCAEFEEE" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[442,779,313,339]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="kallholnense" status="sp. nov.">
|
||
<emphasis id="1790FD50CD4E6A4CF3DA4613FCAEFEEE" box="[442,779,313,339]" italics="true" pageId="42" pageNumber="43">Nathorstoceras kallholnense</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="0CA3402BCD4E6A4CF1724610FCC8FEE9" box="[786,877,314,340]" pageId="42" pageNumber="43" rank="species">sp. nov.</taxonomicNameLabel>
|
||
(above).
|
||
</paragraph>
|
||
<paragraph id="255B2142CD4E6A4CF07C4651FBBDFE2B" blockId="42.[540,1048,379,406]" box="[540,1048,379,406]" pageId="42" pageNumber="43">
|
||
Family
|
||
<taxonomicName id="E2E45AC1CD4E6A4CF0164651FBBDFE2B" authority="Zhuravleva, 1959" authorityName="Zhuravleva" authorityYear="1959" box="[630,1048,379,406]" class="Cephalopoda" family="Geisonoceratidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="42" pageNumber="43" phylum="Mollusca" rank="family">Geisonoceratidae Zhuravleva, 1959</taxonomicName>
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |