247 lines
32 KiB
XML
247 lines
32 KiB
XML
<document id="DBB7B755B2F9C42BBEA0E699BE0CC843" 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="AD4D9054CD436A4FF05C4621FC1FFDD2" 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 kallholnense Kröger 2013, sp. nov." docType="treatment" docUuid="5393FB9D-6642-4D8D-9F4B-C2C741B7CC57" docUuidSource="ZooBank" docVersion="9" lastPageNumber="42" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="40" 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="28559AEC06D57AE5649CED33F1DAF418">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 id="FA55BE43F820258986DA0E1E427D885C" type="personal">
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<mods:roleTerm id="DCE7BDE18BCA26D6F894F07A5C94CC2B">Author</mods:roleTerm>
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<mods:namePart id="08455C20558FD1A4B07200B3EBBD9D26">Kröger, Björn</mods:namePart>
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<mods:typeOfResource id="464119EBE48910AD8D0CCBE66CA50017">text</mods:typeOfResource>
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<mods:title id="0D6CB0CFED76AABB087FAA8D1301A1C2">European Journal of Taxonomy</mods:title>
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<mods:part id="4731E1695E48DA896849951C87DC69CA">
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<mods:date id="32D85A41755AD5E374AE6888C26A0AE4">2013</mods:date>
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<mods:number id="194663B6EE7F7E9D3292429EC1E54F48">2013-03-27</mods:number>
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<mods:number id="8046691CEC0944CA64DDFA2705C7BE22">41</mods:number>
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<mods:identifier id="E715787CE523334F500179433CF9CA34" type="DOI">10.5852/ejt.2013.41</mods:identifier>
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<mods:identifier id="1823CA31E73CB20C2D7CE6253DED5B9A" type="GBIF-Dataset">386010a0-6da4-4fa3-9d1a-4b3b5427cac5</mods:identifier>
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<treatment id="AD4D9054CD436A4FF05C4621FC1FFDD2" ID-DOI="http://doi.org/10.5281/zenodo.3815084" ID-GBIF-Taxon="163977239" ID-Zenodo-Dep="3815084" LSID="urn:lsid:zoobank.org:act:5393FB9D-6642-4D8D-9F4B-C2C741B7CC57" httpUri="http://treatment.plazi.org/id/AD4D9054CD436A4FF05C4621FC1FFDD2" lastPageId="41" lastPageNumber="42" pageId="39" pageNumber="40">
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<subSubSection id="6DFE72C9CD436A41F05C4621FC5DFE9B" box="[572,1016,267,294]" pageId="39" pageNumber="40" type="nomenclature">
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<paragraph id="255B2142CD436A41F05C4621FC5DFE9B" blockId="39.[364,1223,267,364]" box="[572,1016,267,294]" pageId="39" pageNumber="40">
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<heading id="7E13962ECD436A41F05C4621FC5DFE9B" box="[572,1016,267,294]" centered="true" fontSize="11" level="2" pageId="39" pageNumber="40" reason="2">
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<taxonomicName id="E2E45AC1CD436A41F05C4621FC33FE9B" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[572,918,267,294]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="39" pageNumber="40" phylum="Mollusca" rank="species" species="kallholnense" status="sp. nov.">
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<emphasis id="1790FD50CD436A41F05C4621FC33FE9B" bold="true" box="[572,918,267,294]" italics="true" pageId="39" pageNumber="40">Nathorstoceras kallholnense</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="0CA3402BCD436A41F1FD4626FC5DFE9B" box="[925,1016,268,294]" pageId="39" pageNumber="40" rank="species">sp. nov.</taxonomicNameLabel>
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</heading>
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</paragraph>
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</subSubSection>
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||
<subSubSection id="6DFE72C9CD436A41F30C4604FC49FED1" pageId="39" pageNumber="40" type="description">
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<paragraph id="255B2142CD436A41F30C4604FB62FEF4" blockId="39.[364,1223,267,364]" box="[364,1223,302,329]" pageId="39" pageNumber="40">
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<uri id="51752D40CD436A41F30C4604FB62FEF4" box="[364,1223,302,329]" pageId="39" pageNumber="40">
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urn:lsid:zoobank.org:act:
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<uuid id="51421B97CD436A41F0EC4604FB62FEF4" box="[652,1223,302,329]" pageId="39" pageNumber="40">5393FB9D-6642-4D8D-9F4B-C2C741B7CC57</uuid>
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</uri>
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</paragraph>
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<paragraph id="255B2142CD436A41F0284678FC49FED1" blockId="39.[364,1223,267,364]" box="[584,1004,338,364]" pageId="39" pageNumber="40">
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<figureCitation id="BDDF3DC7CD436A41F0284678FD12FED1" box="[584,695,338,364]" 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="39" pageNumber="40">Figs 10D</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD436A41F0A34678FD50FED1" box="[707,757,338,364]" 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="39" pageNumber="40">13E</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD436A41F1614678FCB8FED1" box="[769,797,338,364]" 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="39" pageNumber="40">19</figureCitation>
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B-C, F, 20B, 21A
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD436A41F2DD46B9FC61FD6F" pageId="39" pageNumber="40" type="diagnosis">
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<paragraph id="255B2142CD436A41F2DD46B9FE93FE10" blockId="39.[189,310,403,429]" box="[189,310,403,429]" pageId="39" pageNumber="40">
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||
<heading id="7E13962ECD436A41F2DD46B9FE93FE10" bold="true" box="[189,310,403,429]" fontSize="11" level="3" pageId="39" pageNumber="40" reason="3">
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<emphasis id="1790FD50CD436A41F2DD46B9FE93FE10" bold="true" box="[189,310,403,429]" pageId="39" pageNumber="40">Diagnosis</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD46E8FC61FD6F" blockId="39.[189,1399,450,723]" pageId="39" pageNumber="40">
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<taxonomicName id="E2E45AC1CD436A41F2DD46E8FED7FE61" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[189,370,450,476]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="39" pageNumber="40" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="1790FD50CD436A41F2DD46E8FED7FE61" box="[189,370,450,476]" italics="true" pageId="39" pageNumber="40">Nathorstoceras</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="0CA3402BCD436A41F31646E8FE7BFE61" box="[374,478,450,476]" pageId="39" pageNumber="40" rank="genus">gen. nov.</taxonomicNameLabel>
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with slightly curved annulated conch; angle of expansion of 10–13°; annulations more pronounced in late growth stages; shell sculpture of irregularly spaced, pronounced transverse growth lines, less than one millimeter apart; distance between annulations ca. 0.3 of corresponding conch height; annuli and growth lines with shallow sinus on prosiphuncular side; conch cross section compressed; width/height ratio ca. 0.87; septal distance ca. 0.3 of corresponding conch height; siphuncle eccentric (SPR ca. 0.3); septal perforation ca. 0.07 of corresponding conch height; siphuncular segments abruptly expanded at septal foramen with maximum diameter ca. 0.14 of conch diameter; epi- and hyposeptal deposits present; endosiphuncular deposits not known.
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD436A41F2DD45D0FE57FCFF" box="[189,498,762,835]" pageId="39" pageNumber="40" type="etymology">
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<paragraph id="255B2142CD436A41F2DD45D0FEE1FCA9" blockId="39.[189,324,762,788]" box="[189,324,762,788]" pageId="39" pageNumber="40">
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<heading id="7E13962ECD436A41F2DD45D0FEE1FCA9" bold="true" box="[189,324,762,788]" fontSize="11" level="3" pageId="39" pageNumber="40" reason="3">
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<emphasis id="1790FD50CD436A41F2DD45D0FEE1FCA9" bold="true" box="[189,324,762,788]" pageId="39" pageNumber="40">Etymology</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD4402FE57FCFF" blockId="39.[189,498,808,835]" box="[189,498,808,835]" pageId="39" pageNumber="40">
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Refers to the
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<typeStatus id="FA5F9FE0CD436A41F33A4403FE28FCFE" box="[346,397,809,835]" pageId="39" pageNumber="40">type</typeStatus>
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locality.
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD436A41F2DD4440FD9EFB82" pageId="39" pageNumber="40" type="materials_examined">
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<paragraph id="255B2142CD436A41F2DD4440FEC9FC3E" blockId="39.[189,364,873,900]" box="[189,364,873,900]" pageId="39" pageNumber="40">
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<heading id="7E13962ECD436A41F2DD4440FEC9FC3E" bold="true" box="[189,364,873,900]" fontSize="11" level="3" pageId="39" pageNumber="40" reason="3">
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<emphasis id="1790FD50CD436A41F2DD4440FEC9FC3E" bold="true" box="[189,364,873,900]" pageId="39" pageNumber="40">Type material</emphasis>
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</heading>
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</paragraph>
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<materialsCitation id="958C2B1FCD436A41F28A44B2FEF0FC68" ID-GBIF-Occurrence="2610779307" collectionCode="PMU" pageId="39" pageNumber="40" specimenCode="PMU 26729" specimenCount="1" typeStatus="holotype">
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<paragraph id="255B2142CD436A41F28A44B2FEF9FC0F" blockId="39.[189,1398,920,1087]" box="[234,348,920,946]" pageId="39" pageNumber="40">
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<emphasis id="1790FD50CD436A41F28A44B2FEF9FC0F" bold="true" box="[234,348,920,946]" pageId="39" pageNumber="40">
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<typeStatus id="FA5F9FE0CD436A41F28A44B2FEF9FC0F" box="[234,348,920,946]" pageId="39" pageNumber="40" type="holotype">Holotype</typeStatus>
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</emphasis>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD4496FEF0FC68" blockId="39.[189,1398,920,1087]" box="[189,341,955,982]" pageId="39" pageNumber="40">
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<specimenCode id="75428939CD436A41F2DD4496FEF4FC68" box="[189,337,955,982]" pageId="39" pageNumber="40">PMU 26729</specimenCode>
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.
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</paragraph>
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</materialsCitation>
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<paragraph id="255B2142CD436A41F28A44F5FEC2FC44" blockId="39.[189,1398,920,1087]" box="[234,359,991,1017]" pageId="39" pageNumber="40">
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||
<emphasis id="1790FD50CD436A41F28A44F5FEC2FC44" bold="true" box="[234,359,991,1017]" pageId="39" pageNumber="40">
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||
<typeStatus id="FA5F9FE0CD436A41F28A44F5FEC2FC44" box="[234,359,991,1017]" pageId="39" pageNumber="40" type="paratype">Paratypes</typeStatus>
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</emphasis>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD4328FD9EFB82" blockId="39.[189,1398,920,1087]" pageId="39" pageNumber="40">
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Four
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<typeStatus id="FA5F9FE0CD436A41F29A4328FECAFBA1" box="[250,367,1026,1052]" pageId="39" pageNumber="40" type="paratype">paratypes</typeStatus>
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:
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<collectionCode id="43F5B987CD436A41F3184328FE1DFBA1" box="[376,440,1026,1052]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="39" pageNumber="40">PMU</collectionCode>
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d1376, 26730–26732, from Kallholn, Siljan District,
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<collectingCountry id="5DF361D2CD436A41F6424328FB26FBA1" box="[1058,1155,1026,1052]" name="Sweden" pageId="39" pageNumber="40">Sweden</collectingCountry>
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; all Boda Limestone, Boda Core Member, late Katian.
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD436A41F2DD434DFA94FB12" pageId="39" pageNumber="40" type="distribution">
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||
<paragraph id="255B2142CD436A41F2DD434DFE5EFB3D" blockId="39.[189,507,1126,1153]" box="[189,507,1126,1153]" pageId="39" pageNumber="40">
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||
<heading id="7E13962ECD436A41F2DD434DFE5EFB3D" bold="true" box="[189,507,1126,1153]" fontSize="11" level="3" pageId="39" pageNumber="40" reason="3">
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<emphasis id="1790FD50CD436A41F2DD434DFE5EFB3D" bold="true" box="[189,507,1126,1153]" pageId="39" pageNumber="40">Type locality and horizon</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD43BFFA94FB12" blockId="39.[189,1329,1173,1199]" box="[189,1329,1173,1199]" pageId="39" pageNumber="40">
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Kallholn, Siljan District,
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<collectingCountry id="5DF361D2CD436A41F38543BFFDE0FB12" box="[485,581,1173,1199]" name="Sweden" pageId="39" pageNumber="40">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="6DFE72C9CD436A4FF2DD43FCFE5BFED1" lastPageId="41" lastPageNumber="42" pageId="39" pageNumber="40" type="description">
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<paragraph id="255B2142CD436A41F2DD43FCFEEBFB4D" blockId="39.[189,334,1238,1264]" box="[189,334,1238,1264]" pageId="39" pageNumber="40">
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||
<heading id="7E13962ECD436A41F2DD43FCFEEBFB4D" bold="true" box="[189,334,1238,1264]" fontSize="11" level="3" pageId="39" pageNumber="40" reason="3">
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||
<emphasis id="1790FD50CD436A41F2DD43FCFEEBFB4D" bold="true" box="[189,334,1238,1264]" pageId="39" pageNumber="40">Description</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD436A41F2DD422FFAA2F954" blockId="39.[189,1399,1285,1769]" pageId="39" pageNumber="40">
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||
The
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<typeStatus id="FA5F9FE0CD436A41F291422FFEFDFAA2" box="[241,344,1285,1311]" pageId="39" pageNumber="40" type="holotype">holotype</typeStatus>
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is a piece of phragmocone ca.
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<quantity id="E21C8CA7CD436A41F0DC422FFCA8FAA2" box="[700,781,1285,1311]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="39" pageNumber="40" unit="mm" value="60.0">60 mm</quantity>
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long, a height of
|
||
<quantity id="E21C8CA7CD436A41F1B7422FFBF1FAA2" box="[983,1108,1285,1311]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" metricValueMax="3.3" metricValueMin="2.7" pageId="39" pageNumber="40" unit="mm" value="30.0" valueMax="33.0" valueMin="27.0">27–33 mm</quantity>
|
||
and a width at the adoral end of
|
||
<quantity id="E21C8CA7CD436A41F36D4202FEFAFAFE" box="[269,351,1320,1347]" metricMagnitude="-2" metricUnit="m" metricValue="3.3" pageId="39" pageNumber="40" unit="mm" value="33.0">33 mm</quantity>
|
||
(width/height ratio 0.87, angle of expansion 10.4°) (
|
||
<figureCitation id="BDDF3DC7CD436A41F1A14202FB92FAFE" box="[961,1079,1320,1347]" 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="39" pageNumber="40">Figs 10 D</figureCitation>
|
||
,
|
||
<figureCitation id="BDDF3DC7CD436A41F6224202FBD1FAFF" box="[1090,1140,1320,1346]" 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="39" pageNumber="40">19F</figureCitation>
|
||
). The conch is weakly annulated with a distance between two successive annuli ca. 0.3 that of the corresponding conch cross section, and ornamented with pronounced, irregularly spaced growth lines or raised bands, each with a width of less than a millimeter. The conch is slightly crushed, and nearly straight, with an eccentrically positioned siphuncle. Because of the fragmented shell the siphuncle appears to be positioned on the convex side of the shell curvature. A reconstruction of the shell indicates that the siphuncle is on the convex side of a very slightly curved phragmocone. At the apical end of the specimen the distance of the siphuncle from the conch margin is
|
||
<quantity id="E21C8CA7CD436A41F0A54135FCA9F984" box="[709,780,1567,1593]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" pageId="39" pageNumber="40" unit="mm" value="9.0">9 mm</quantity>
|
||
(SPR 0.33). The siphuncle is much wider than the septal perforation, and at the adapical end of the specimen the septal perforation is ca.
|
||
<quantity id="E21C8CA7CD436A41F6D84168FAB0F9E1" box="[1208,1301,1602,1628]" metricMagnitude="-3" metricUnit="m" metricValue="1.8" pageId="39" pageNumber="40" unit="mm" value="1.8">1.8 mm</quantity>
|
||
, and the maximum diameter of the siphuncle is
|
||
<quantity id="E21C8CA7CD436A41F0E4414FFD78F9C2" box="[644,733,1637,1664]" metricMagnitude="-3" metricUnit="m" metricValue="3.5" pageId="39" pageNumber="40" unit="mm" value="3.5">3.5 mm</quantity>
|
||
(0.07 and 0.13 of the corresponding conch cross section, respectively) (
|
||
<figureCitation id="BDDF3DC7CD436A41F30641A2FE73F91F" box="[358,470,1672,1698]" 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="39" pageNumber="40">Figs 20B</figureCitation>
|
||
,
|
||
<figureCitation id="BDDF3DC7CD436A41F38441A2FDBEF91F" box="[484,539,1672,1698]" 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="39" pageNumber="40">21A</figureCitation>
|
||
). The septa are
|
||
<quantity id="E21C8CA7CD436A41F0BA41A2FCBAF91E" box="[730,799,1672,1699]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" pageId="39" pageNumber="40" unit="mm" value="9.0">9 mm</quantity>
|
||
apart where the corresponding conch height is
|
||
<quantity id="E21C8CA7CD436A41F73941A2FF4BF97B" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="39" pageNumber="40" unit="mm" value="30.0">30 mm</quantity>
|
||
. The septal necks are achoanitic and siphuncular segments (connecting rings) are abruptly expanded at the septal foramen. At the adapical end of the specimen epi- and hyposeptal deposits occur.
|
||
</paragraph>
|
||
<paragraph id="255B2142CD436A4FF2DD403AFE5BFED1" blockId="39.[189,1399,1808,2010]" lastBlockId="41.[189,1399,267,364]" lastPageId="41" lastPageNumber="42" pageId="39" pageNumber="40">
|
||
Specimen PMU 26730 is a fragment of a body chamber with a length of
|
||
<quantity id="E21C8CA7CD436A41F659403AFB37F897" box="[1081,1170,1808,1834]" metricMagnitude="-2" metricUnit="m" metricValue="7.2" pageId="39" pageNumber="40" unit="mm" value="72.0">72 mm</quantity>
|
||
, a height of
|
||
<quantity id="E21C8CA7CD436A41F74D403AFF4BF8F3" metricMagnitude="-2" metricUnit="m" metricValue="3.65" metricValueMax="4.4" metricValueMin="2.9" pageId="39" pageNumber="40" unit="mm" value="36.5" valueMax="44.0" valueMin="29.0">29–44 mm</quantity>
|
||
, and a width of
|
||
<quantity id="E21C8CA7CD436A41F3CE4019FD8BF8F3" box="[430,558,1843,1870]" metricMagnitude="-2" metricUnit="m" metricValue="3.2" metricValueMax="3.8" metricValueMin="2.6" pageId="39" pageNumber="40" unit="mm" value="32.0" valueMax="38.0" valueMin="26.0">26–38 mm</quantity>
|
||
(width/height ratio 0.86–0.89, angle of expansion 11.8°) (
|
||
<figureCitation id="BDDF3DC7CD436A41F6BF4019FA91F8F0" box="[1247,1332,1843,1869]" 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="39" pageNumber="40">Fig. 19</figureCitation>
|
||
B-C). The conch cross section is elliptical, with the antisiphuncular side slightly more sharply rounded. The conch is annulated with rounded, shallow annuli
|
||
<quantity id="E21C8CA7CD436A41F16C4050FCC4F829" box="[780,865,1914,1940]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="39" pageNumber="40" unit="mm" value="12.0">12 mm</quantity>
|
||
apart at a corresponding conch height of
|
||
<quantity id="E21C8CA7CD436A41F7394050FF4BF80A" metricMagnitude="-2" metricUnit="m" metricValue="4.0" pageId="39" pageNumber="40" unit="mm" value="40.0">40 mm</quantity>
|
||
. In addition, pronounced, irregularly spaced growth lines run parallel to the annuli, both of which are slightly oblique and form a shallow sinus on the prosiphuncular side of the conch. The siphuncle is eccentric (SPR 0.28), lying on the convex side of the conch curvature. Specimen PMU 26731, which is a part of a phragmocone and body chamber, is the largest specimen of this species with a maximum conch height of ca.
|
||
<quantity id="E21C8CA7CD4D6A4FF3C44678FE5CFED1" box="[420,505,338,364]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="41" pageNumber="42" unit="mm" value="60.0">60 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="719B71CACD4C6A4EF2DD4057FBF4F860" ID-DOI="http://doi.org/10.5281/zenodo.3814265" ID-Zenodo-Dep="3814265" httpUri="https://zenodo.org/record/3814265/files/figure.png" pageId="40" pageNumber="41" startId="40.[189,232,1917,1943]" targetBox="[474,1114,265,1870]" targetPageId="40">
|
||
<paragraph id="255B2142CD4C6A4EF2DD4057FBF4F860" blockId="40.[189,1399,1917,2014]" pageId="40" pageNumber="41">
|
||
<emphasis id="1790FD50CD4C6A4EF2DD4057FE82F82A" bold="true" box="[189,295,1917,1943]" pageId="40" pageNumber="41">Fig. 20.</emphasis>
|
||
Polished median sections of
|
||
<taxonomicName id="E2E45AC1CD4C6A4EF0A94057FCDBF82A" authorityName="Kröger" authorityYear="2013" box="[713,894,1917,1943]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="40" pageNumber="41" phylum="Mollusca" rank="genus">
|
||
<emphasis id="1790FD50CD4C6A4EF0A94057FCDBF82A" box="[713,894,1917,1943]" italics="true" pageId="40" pageNumber="41">Nathorstoceras</emphasis>
|
||
</taxonomicName>
|
||
sp. nov., Kallholn, Boda Limestone.
|
||
<emphasis id="1790FD50CD4C6A4EF2DD408AFF77F807" bold="true" box="[189,210,1952,1978]" pageId="40" pageNumber="41">A</emphasis>
|
||
.
|
||
<taxonomicName id="E2E45AC1CD4C6A4EF281408AFDA0F807" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[225,517,1952,1978]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="adnatum" status="sp. nov.">
|
||
<emphasis id="1790FD50CD4C6A4EF281408AFDA0F807" box="[225,517,1952,1978]" italics="true" pageId="40" pageNumber="41">Nathorstoceras adnatum</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="0CA3402BCD4C6A4EF06D408BFDCFF806" box="[525,618,1953,1979]" pageId="40" pageNumber="41" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, PMU 26733, holotype, Kallholn.
|
||
<emphasis id="1790FD50CD4C6A4EF663408BFBB2F806" bold="true" box="[1027,1047,1953,1979]" pageId="40" pageNumber="41">B</emphasis>
|
||
.
|
||
<taxonomicName id="E2E45AC1CD4C6A4EF645408AFAD3F807" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[1061,1398,1952,1978]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="kallholnense" status="sp. nov.">
|
||
<emphasis id="1790FD50CD4C6A4EF645408AFAD3F807" box="[1061,1398,1952,1978]" italics="true" pageId="40" pageNumber="41">Nathorstoceras kallholnense</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="0CA3402BCD4C6A4EF2DD40EEFEBFF863" box="[189,282,1988,2014]" pageId="40" pageNumber="41" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, PMU 26729, holotype, Kallholn. Scale bar = 10 mm for both figures.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="6DFE72C9CD4D6A4FF2DD46B9FCDEFE42" pageId="41" pageNumber="42" type="discussion">
|
||
<paragraph id="255B2142CD4D6A4FF2DD46B9FEFDFE10" blockId="41.[189,344,403,429]" box="[189,344,403,429]" pageId="41" pageNumber="42">
|
||
<heading id="7E13962ECD4D6A4FF2DD46B9FEFDFE10" bold="true" box="[189,344,403,429]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
|
||
<emphasis id="1790FD50CD4D6A4FF2DD46B9FEFDFE10" bold="true" box="[189,344,403,429]" pageId="41" pageNumber="42">Comparison</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD4D6A4FF2DD46E8FCDEFE42" blockId="41.[189,1398,450,511]" pageId="41" pageNumber="42">
|
||
<taxonomicName id="E2E45AC1CD4D6A4FF2DD46E8FDB5FE61" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[189,528,450,476]" class="Cephalopoda" family="Eriditidae" genus="Nathorstoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="41" pageNumber="42" phylum="Mollusca" rank="species" species="kallholnense" status="sp. nov.">
|
||
<emphasis id="1790FD50CD4D6A4FF2DD46E8FDB5FE61" box="[189,528,450,476]" italics="true" pageId="41" pageNumber="42">Nathorstoceras kallholnense</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="0CA3402BCD4D6A4FF07A46E8FDD2FE61" box="[538,631,450,476]" pageId="41" pageNumber="42" rank="species">sp. nov.</taxonomicNameLabel>
|
||
differs from
|
||
<taxonomicName id="E2E45AC1CD4D6A4FF17946E9FC00FE61" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[793,933,450,476]" 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.">
|
||
<emphasis id="1790FD50CD4D6A4FF17946E9FC00FE61" box="[793,933,450,476]" italics="true" pageId="41" pageNumber="42">N. adnatum</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="0CA3402BCD4D6A4FF1CE46E8FBAEFE61" box="[942,1035,450,476]" pageId="41" pageNumber="42" rank="species">sp. nov.</taxonomicNameLabel>
|
||
in having a more pronounced annulated conch and a less compressed conch cross section.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="6DFE72C9CD4D6A4FF2DD450CFC1FFDD2" pageId="41" pageNumber="42" type="multiple">
|
||
<paragraph id="255B2142CD4D6A4FF2DD450CFDD8FDFC" blockId="41.[189,637,550,577]" box="[189,637,550,577]" pageId="41" pageNumber="42">
|
||
<heading id="7E13962ECD4D6A4FF2DD450CFDD8FDFC" bold="true" box="[189,637,550,577]" fontSize="11" level="3" pageId="41" pageNumber="42" reason="3">
|
||
<emphasis id="1790FD50CD4D6A4FF2DD450CFDD8FDFC" bold="true" box="[189,637,550,577]" pageId="41" pageNumber="42">Stratigraphic and geographic range</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD4D6A4FF2DD457FFC1FFDD2" blockId="41.[189,954,597,623]" box="[189,954,597,623]" pageId="41" pageNumber="42">
|
||
Boda Limestone,
|
||
<collectingRegion id="E720EFA0CD4D6A4FF3ED457FFE48FDD2" box="[397,493,597,623]" country="Sweden" name="Dalarna" pageId="41" pageNumber="42">Dalarna</collectingRegion>
|
||
,
|
||
<collectingCountry id="5DF361D2CD4D6A4FF398457FFDFDFDD2" box="[504,600,597,623]" name="Sweden" pageId="41" pageNumber="42">Sweden</collectingCountry>
|
||
, late Katian, Late Ordovician.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |