280 lines
34 KiB
XML
280 lines
34 KiB
XML
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<mods:title id="6ADD4FB0FE922E28298E098DE10C78A9">The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
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<mods:namePart id="2904770F4325E2DBF8B375CE01D36CDF">Kröger, Björn</mods:namePart>
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<mods:title id="EC6A9F9E7900D233A5A484075477787E">European Journal of Taxonomy</mods:title>
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<mods:part id="62008A147BB5683C2732C59224F837DE">
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<mods:date id="59842E0A2656B396F86B90E5690E7EBC">2013</mods:date>
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<mods:number id="264CEE497FDA706B654ACB900C5FFC59">2013-03-27</mods:number>
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<treatment id="AD4D9054CD5A6A59F02A412BFBD2F93D" ID-DOI="http://doi.org/10.5281/zenodo.3815139" ID-GBIF-Taxon="163977254" ID-Zenodo-Dep="3815139" LSID="urn:lsid:plazi:treatment:AD4D9054CD5A6A59F02A412BFBD2F93D" httpUri="http://treatment.plazi.org/id/AD4D9054CD5A6A59F02A412BFBD2F93D" lastPageId="63" lastPageNumber="64" pageId="62" pageNumber="63">
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<subSubSection id="6DFE72C9CD5A6A58F02A412BFC4CF9A6" box="[586,1001,1537,1564]" pageId="62" pageNumber="63" type="nomenclature">
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<paragraph id="255B2142CD5A6A58F02A412BFC4CF9A6" blockId="62.[586,1001,1537,1598]" box="[586,1001,1537,1564]" pageId="62" pageNumber="63">
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<heading id="7E13962ECD5A6A58F02A412BFC4CF9A6" box="[586,1001,1537,1564]" centered="true" fontSize="11" level="2" pageId="62" pageNumber="63" reason="2">
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<taxonomicName id="E2E45AC1CD5A6A58F02A412BFC4CF9A6" authority="(Hall, 1847)" baseAuthorityName="Hall" baseAuthorityYear="1847" box="[586,1001,1537,1564]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="62" pageNumber="63" phylum="Mollusca" rank="species" species="junceum">
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<emphasis id="1790FD50CD5A6A58F02A412BFCF6F9A6" bold="true" box="[586,851,1537,1564]" italics="true" pageId="62" pageNumber="63">Isorthoceras junceum</emphasis>
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(
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<bibRefCitation id="41755CB3CD5A6A58F103412BFC44F9A6" author="Hall J." box="[867,993,1537,1563]" pageId="62" pageNumber="63" refId="ref48004" refString="Hall J. 1847. Natural History of New York, Paleontology, Volume 1, containing Descriptions of the Organic Remains of the Lower Division of the New-York System (Equivalent of the Lower Silurian Rocks of Europe). Van Benthuysen, Albany, New York." type="book" year="1847">Hall, 1847</bibRefCitation>
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||
)
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</taxonomicName>
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||
</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD5A6A58F0A5410EFCCBF983" box="[709,878,1572,1598]" pageId="62" pageNumber="63" type="description">
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<paragraph id="255B2142CD5A6A58F0A5410EFCCBF983" blockId="62.[586,1001,1537,1598]" box="[709,878,1572,1598]" pageId="62" pageNumber="63">
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<figureCitation id="BDDF3DC7CD5A6A58F0A5410EFC94F983" box="[709,817,1572,1598]" captionStart="Fig" captionStartId="32.[189,232,1690,1716]" captionTargetBox="[189,1400,266,1648]" captionTargetId="figure@32.[189,1400,266,1647]" captionTargetPageId="32" captionText="Fig. 17. Shell ornamentation of selected Orthocerida of the Boda Formation. A. Isorthoceras cf. elongatocinctum (Portlock, 1843), PMU 26825, Kallholn, adoral part of the specimen. B. Dawsonoceras stumburi sp. nov., PMU 26717, holotype, Kallholn. C. Gorbyoceras sp. A, PMU 26772, Osmundsberget. D. Isorthoceras cf. elongatocinctum (Portlock, 1843), same specimen as in A, adapical part of specimen. E. Isorthoceras junceum (Hall, 1847), PMU 26834, Kallholn. F. Gorbyoceras alternestriatum (Strand, 1934) comb. nov., PMU 26771, Unskarsheden. G. Isorthoceras curvilineatum sp. nov., PMU 26787, holotype, Osmundsberget. H. Isorthoceras angelini sp. nov., PMU 26774, holotype, Kallholn. I. Isorthoceras suave (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26835, Kallholn. Scale bar = 5 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814259" httpUri="https://zenodo.org/record/3814259/files/figure.png" pageId="62" pageNumber="63">Figs 17E</figureCitation>
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,
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<figureCitation id="BDDF3DC7CD5A6A58F15D410EFCCBF983" box="[829,878,1572,1598]" 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="62" pageNumber="63">23C</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="6DFE72C9CD5A6A58F2DD414CFBFEF958" pageId="62" pageNumber="63" type="reference_group">
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<paragraph id="255B2142CD5A6A58F2DD414CFC94F93D" blockId="62.[189,817,1638,1664]" box="[189,817,1638,1664]" pageId="62" pageNumber="63">
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<treatmentCitationGroup id="05F4066CCD5A6A58F2DD414CFC94F93D" box="[189,817,1638,1664]" pageId="62" pageNumber="63">
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<treatmentCitation id="A4450753CD5A6A58F2DD414CFDCAF93D" author="Hall J." box="[189,623,1638,1664]" page="204" pageId="62" pageNumber="63" year="1847">
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<taxonomicName id="E2E45AC1CD5A6A58F2DD414CFDCAF93D" authority="Hall, 1847: 204" authorityName="Hall" authorityPageNumber="204" authorityYear="1847" box="[189,623,1638,1664]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="62" pageNumber="63" phylum="Tracheophyta" rank="species" species="junceum">
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<emphasis id="1790FD50CD5A6A58F2DD414CFE08F93D" box="[189,429,1638,1664]" italics="true" pageId="62" pageNumber="63">Orthoceras junceum</emphasis>
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<bibRefCitation id="41755CB3CD5A6A58F3D5414CFDCAF93D" author="Hall J." box="[437,623,1638,1664]" pageId="62" pageNumber="63" refId="ref48004" refString="Hall J. 1847. Natural History of New York, Paleontology, Volume 1, containing Descriptions of the Organic Remains of the Lower Division of the New-York System (Equivalent of the Lower Silurian Rocks of Europe). Van Benthuysen, Albany, New York." type="book" year="1847">Hall, 1847: 204</bibRefCitation>
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</taxonomicName>
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</treatmentCitation>
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, pl. 47; fig. 3a-f.
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</treatmentCitationGroup>
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</paragraph>
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<paragraph id="255B2142CD5A6A58F2DD4182FC29F97C" blockId="62.[189,1115,1703,1765]" box="[189,908,1703,1730]" pageId="62" pageNumber="63">
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<treatmentCitationGroup id="05F4066CCD5A6A58F2DD4182FC29F97C" box="[189,908,1703,1730]" pageId="62" pageNumber="63">
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<taxonomicName id="E2E45AC1CD5A6A58F2DD4182FE6CF97C" authorityName="Hall" authorityYear="1877" box="[189,457,1704,1730]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="62" pageNumber="63" phylum="Mollusca" rank="species" species="junceum">
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<emphasis id="1790FD50CD5A6A58F2DD4182FE6CF97C" box="[189,457,1704,1730]" italics="true" pageId="62" pageNumber="63">Geisonoceras junceum</emphasis>
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</taxonomicName>
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–
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<treatmentCitation id="A4450753CD5A6A58F386418DFD71F97C" author="Balashov E. G." box="[486,724,1703,1730]" page="199" pageId="62" pageNumber="63" year="1956">
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||
<bibRefCitation id="41755CB3CD5A6A58F386418DFD71F97C" author="Balashov E. G." box="[486,724,1703,1730]" pageId="62" pageNumber="63" pagination="196 - 200" refId="ref46483" refString="Balashov E. G. 1956. Nautiloidei ordovika Chu-Iliiskich gor i Vet-Chak-Daly. Trudy Geologicheskogo Instituta, Akademia Nauk SSSR 1: 196 - 200." type="journal article" year="1956">Balashov 1956: 199</bibRefCitation>
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</treatmentCitation>
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, pl. 4, fig. 4a-b.
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</treatmentCitationGroup>
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</paragraph>
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<paragraph id="255B2142CD5A6A58F2DD41E0FBFEF958" blockId="62.[189,1115,1703,1765]" box="[189,1115,1738,1765]" pageId="62" pageNumber="63">
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||
<treatmentCitationGroup id="05F4066CCD5A6A58F2DD41E0FBFEF958" box="[189,1115,1738,1765]" pageId="62" pageNumber="63">
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||
<taxonomicName id="E2E45AC1CD5A6A58F2DD41E0FEF4F959" authorityName="Flower" authorityYear="1962" box="[189,337,1738,1764]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="62" pageNumber="63" phylum="Mollusca" rank="genus">
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<emphasis id="1790FD50CD5A6A58F2DD41E0FEF4F959" box="[189,337,1738,1764]" italics="true" pageId="62" pageNumber="63">Isorthoceras</emphasis>
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</taxonomicName>
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?
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<taxonomicName id="E2E45AC1CD5A6A58F30641E1FE6CF959" authorityName="Hall" authorityYear="1877" box="[358,457,1739,1764]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="62" pageNumber="63" phylum="Mollusca" rank="species" species="junceum">
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<emphasis id="1790FD50CD5A6A58F30641E1FE6CF959" box="[358,457,1739,1764]" italics="true" pageId="62" pageNumber="63">junceum</emphasis>
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</taxonomicName>
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–
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<treatmentCitation id="A4450753CD5A6A58F38641E1FD49F959" author="Kroger B. & Ebbestad J. O. R. & Hogstrom A. E. S. & Frisk A. M." box="[486,748,1738,1765]" page="46" pageId="62" pageNumber="63" year="2011">
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||
<bibRefCitation id="41755CB3CD5A6A58F38641E1FD49F959" author="Kroger B. & Ebbestad J. O. R. & Hogstrom A. E. S. & Frisk A. M." box="[486,748,1738,1765]" pageId="62" pageNumber="63" pagination="35 - 53" refId="ref48453" refString="Kroger B., Ebbestad J. O. R., Hogstrom A. E. S. & Frisk A. M. 2011. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationship. Fossil Record 14: 35 - 53. http: // dx. doi. org / 10.1002 / mmng. 201000014" type="journal article" year="2011">
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Kröger
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<emphasis id="1790FD50CD5A6A58F02141E1FDD9F959" box="[577,636,1738,1764]" italics="true" pageId="62" pageNumber="63">et al.</emphasis>
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2011: 46
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</bibRefCitation>
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</treatmentCitation>
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, figs 4a, 9h-i (with synonymy).
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</treatmentCitationGroup>
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</paragraph>
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</subSubSection>
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||
<subSubSection id="6DFE72C9CD5A6A58F2DD4026FDADF803" pageId="62" pageNumber="63" type="diagnosis">
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<paragraph id="255B2142CD5A6A58F2DD4026FE93F89B" blockId="62.[189,310,1804,1830]" box="[189,310,1804,1830]" pageId="62" pageNumber="63">
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||
<heading id="7E13962ECD5A6A58F2DD4026FE93F89B" bold="true" box="[189,310,1804,1830]" fontSize="11" level="3" pageId="62" pageNumber="63" reason="3">
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<emphasis id="1790FD50CD5A6A58F2DD4026FE93F89B" bold="true" box="[189,310,1804,1830]" pageId="62" pageNumber="63">Diagnosis</emphasis>
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</heading>
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</paragraph>
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<paragraph id="255B2142CD5A6A58F2DD4010FDADF803" blockId="62.[189,1399,1850,1982]" pageId="62" pageNumber="63">
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Transversally ornamented, straight
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<taxonomicName id="E2E45AC1CD5A6A58F0374010FD4EF8E9" authorityName="Flower" authorityYear="1962" box="[599,747,1850,1876]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="62" pageNumber="63" phylum="Mollusca" rank="genus">
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<emphasis id="1790FD50CD5A6A58F0374010FD4EF8E9" box="[599,747,1850,1876]" italics="true" pageId="62" pageNumber="63">Isorthoceras</emphasis>
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</taxonomicName>
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with circular cross section and comparatively low angle of expansion of 5°, chamber distance 0.2–0.3 of corresponding cross section; adult size ca.
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<quantity id="E21C8CA7CD5A6A58F6BD4074FAFFF8C5" box="[1245,1370,1886,1912]" metricMagnitude="-2" metricUnit="m" metricValue="1.05" metricValueMax="1.1" metricValueMin="1.0" pageId="62" pageNumber="63" unit="mm" value="10.5" valueMax="11.0" valueMin="10.0">10–11 mm</quantity>
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in cross section; siphuncle subcentral-central with diameter ca. 0.1 of corresponding conch cross section. (Compiled from
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<bibRefCitation id="41755CB3CD5A6A58F3E2408EFE5EF803" author="Hall J." box="[386,507,1956,1982]" pageId="62" pageNumber="63" refId="ref48004" refString="Hall J. 1847. Natural History of New York, Paleontology, Volume 1, containing Descriptions of the Organic Remains of the Lower Division of the New-York System (Equivalent of the Lower Silurian Rocks of Europe). Van Benthuysen, Albany, New York." type="book" year="1847">Hall 1847</bibRefCitation>
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.)
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</paragraph>
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</subSubSection>
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||
<subSubSection id="6DFE72C9CD5B6A59F2DD4621FE03FE5B" pageId="63" pageNumber="64" type="materials_examined">
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||
<paragraph id="255B2142CD5B6A59F2DD4621FE5EFE98" blockId="63.[189,507,267,293]" box="[189,507,267,293]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD4621FE5EFE98" bold="true" box="[189,507,267,293]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
|
||
<emphasis id="1790FD50CD5B6A59F2DD4621FE5EFE98" bold="true" box="[189,507,267,293]" pageId="63" pageNumber="64">
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||
<typeStatus id="FA5F9FE0CD5B6A59F2DD4621FF5FFE98" box="[189,250,267,293]" pageId="63" pageNumber="64">Type</typeStatus>
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locality and horizon
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</emphasis>
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||
</heading>
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||
</paragraph>
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||
<paragraph id="255B2142CD5B6A59F2DD4610FBC8FEEE" blockId="63.[189,1133,313,340]" box="[189,1133,313,340]" pageId="63" pageNumber="64">
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||
Watertown,
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||
<collectingRegion id="E720EFA0CD5B6A59F32C4610FE63FEEE" box="[332,454,313,340]" country="United States of America" name="New York" pageId="63" pageNumber="64">New York</collectingRegion>
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||
,
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<collectingCountry id="5DF361D2CD5B6A59F3B14610FDAAFEE9" box="[465,527,314,340]" name="United States of America" pageId="63" pageNumber="64">USA</collectingCountry>
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; Trenton Formation, early Katian, Late Ordovician.
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</paragraph>
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||
<paragraph id="255B2142CD5B6A59F2DD4651FE8FFE28" blockId="63.[189,298,379,405]" box="[189,298,379,405]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD4651FE8FFE28" bold="true" box="[189,298,379,405]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
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||
<emphasis id="1790FD50CD5B6A59F2DD4651FE8FFE28" bold="true" box="[189,298,379,405]" pageId="63" pageNumber="64">Material</emphasis>
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||
</heading>
|
||
</paragraph>
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||
<paragraph id="255B2142CD5B6A59F2DD4680FE03FE5B" blockId="63.[189,1398,425,486]" pageId="63" pageNumber="64">
|
||
Two specimens (
|
||
<collectionCode id="43F5B987CD5B6A59F3E94683FE6EFE7E" box="[393,459,425,451]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="63" pageNumber="64">PMU</collectionCode>
|
||
26833, 26834) from Kallholn, Siljan District,
|
||
<collectingCountry id="5DF361D2CD5B6A59F6654683FBC3FE7E" box="[1029,1126,425,451]" name="Sweden" pageId="63" pageNumber="64">Sweden</collectingCountry>
|
||
; Boda Limestone, late Katian, Ordovician.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="6DFE72C9CD5B6A59F2DD4524FBF9FC98" pageId="63" pageNumber="64" type="description">
|
||
<paragraph id="255B2142CD5B6A59F2DD4524FEEBFD95" blockId="63.[189,334,526,552]" box="[189,334,526,552]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD4524FEEBFD95" bold="true" box="[189,334,526,552]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
|
||
<emphasis id="1790FD50CD5B6A59F2DD4524FEEBFD95" bold="true" box="[189,334,526,552]" pageId="63" pageNumber="64">Description</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD4516FC48FD7D" blockId="63.[189,1399,572,705]" pageId="63" pageNumber="64">
|
||
Specimen PMU 26833 is a fragment of a body chamber
|
||
<quantity id="E21C8CA7CD5B6A59F13C4517FC15FDEA" box="[860,944,573,599]" metricMagnitude="-2" metricUnit="m" metricValue="4.0" pageId="63" pageNumber="64" unit="mm" value="40.0">40 mm</quantity>
|
||
long, with a diameter increasing from
|
||
<quantity id="E21C8CA7CD5B6A59F2DD454AFECFFDC7" box="[189,362,608,634]" metricMagnitude="-2" metricUnit="m" metricValue="1.19" metricValueMax="1.28" metricValueMin="1.1" pageId="63" pageNumber="64" unit="mm" value="11.9" valueMax="12.8" valueMin="11.0">11 to 12.8 mm</quantity>
|
||
(angle of expansion 2.6°). At the adoral end of the specimen, the cast possesses a ca.
|
||
<quantity id="E21C8CA7CD5B6A59F708454AFF4EFD20" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="63" pageNumber="64" unit="mm" value="3.0">3 mm</quantity>
|
||
wide apertural constriction, which indicates a mature apertural shell thickening. The shell surface is ornamented with ca. ten fine rounded transverse striae per millimetre.
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD45CDFBF9FC98" blockId="63.[189,1399,743,805]" pageId="63" pageNumber="64">
|
||
The second specimen is a
|
||
<quantity id="E21C8CA7CD5B6A59F38C45C2FD9BFCBF" box="[492,574,744,770]" metricMagnitude="-2" metricUnit="m" metricValue="4.4" pageId="63" pageNumber="64" unit="mm" value="44.0">44 mm</quantity>
|
||
long portion of a phragmocone, with a diameter increasing from
|
||
<quantity id="E21C8CA7CD5B6A59F75445CDFEB2FC98" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="8.8" metricValueMin="6.2" pageId="63" pageNumber="64" unit="mm" value="7.5" valueMax="8.8" valueMin="6.2">6.2 to 8.8 mm</quantity>
|
||
(angle of expansion 3.4°) and a central thin siphuncle (
|
||
<figureCitation id="BDDF3DC7CD5B6A59F1C04421FBA8FC98" box="[928,1037,779,805]" captionStart="Fig" captionStartId="32.[189,232,1690,1716]" captionTargetBox="[189,1400,266,1648]" captionTargetId="figure@32.[189,1400,266,1647]" captionTargetPageId="32" captionText="Fig. 17. Shell ornamentation of selected Orthocerida of the Boda Formation. A. Isorthoceras cf. elongatocinctum (Portlock, 1843), PMU 26825, Kallholn, adoral part of the specimen. B. Dawsonoceras stumburi sp. nov., PMU 26717, holotype, Kallholn. C. Gorbyoceras sp. A, PMU 26772, Osmundsberget. D. Isorthoceras cf. elongatocinctum (Portlock, 1843), same specimen as in A, adapical part of specimen. E. Isorthoceras junceum (Hall, 1847), PMU 26834, Kallholn. F. Gorbyoceras alternestriatum (Strand, 1934) comb. nov., PMU 26771, Unskarsheden. G. Isorthoceras curvilineatum sp. nov., PMU 26787, holotype, Osmundsberget. H. Isorthoceras angelini sp. nov., PMU 26774, holotype, Kallholn. I. Isorthoceras suave (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26835, Kallholn. Scale bar = 5 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814259" httpUri="https://zenodo.org/record/3814259/files/figure.png" pageId="63" pageNumber="64">Figs 17E</figureCitation>
|
||
,
|
||
<figureCitation id="BDDF3DC7CD5B6A59F67A4421FBEBFC98" box="[1050,1102,779,805]" 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="63" pageNumber="64">23C</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="6DFE72C9CD5B6A59F2DD4466FEC0FA1A" pageId="63" pageNumber="64" type="discussion">
|
||
<paragraph id="255B2142CD5B6A59F2DD4466FE8AFCDB" blockId="63.[189,303,844,870]" box="[189,303,844,870]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD4466FE8AFCDB" bold="true" box="[189,303,844,870]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
|
||
<emphasis id="1790FD50CD5B6A59F2DD4466FE8AFCDB" bold="true" box="[189,303,844,870]" pageId="63" pageNumber="64">Remarks</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD4451FDCFFC43" blockId="63.[189,1399,891,1023]" pageId="63" pageNumber="64">
|
||
The two specimens are assigned to
|
||
<taxonomicName id="E2E45AC1CD5B6A59F03D4456FD7CFC28" authorityName="Hall" authorityYear="1877" box="[605,729,891,917]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="species" species="junceum">
|
||
<emphasis id="1790FD50CD5B6A59F03D4456FDC2FC28" box="[605,615,892,917]" italics="true" pageId="63" pageNumber="64">I</emphasis>
|
||
.
|
||
<emphasis id="1790FD50CD5B6A59F0164456FD7CFC28" box="[630,729,892,917]" italics="true" pageId="63" pageNumber="64">junceum</emphasis>
|
||
</taxonomicName>
|
||
based on the general similarity of the conch dimensions, the low angle of expansion, and the characteristic narrow transverse ornamentation. The adult conch diameter of specimen PMU 26833 is slightly larger than in other specimens of this species, which is interpreted as intraspecific variation.
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD430CFAC1FB70" blockId="63.[189,1399,1062,1229]" pageId="63" pageNumber="64">
|
||
The species was discussed in detail by
|
||
<bibRefCitation id="41755CB3CD5B6A59F01B430CFCC1FBFD" author="Kroger B. & Ebbestad J. O. R. & Hogstrom A. E. S. & Frisk A. M." box="[635,868,1062,1088]" pageId="63" pageNumber="64" pagination="35 - 53" refId="ref48453" refString="Kroger B., Ebbestad J. O. R., Hogstrom A. E. S. & Frisk A. M. 2011. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationship. Fossil Record 14: 35 - 53. http: // dx. doi. org / 10.1002 / mmng. 201000014" type="journal article" year="2011">
|
||
Kröger
|
||
<emphasis id="1790FD50CD5B6A59F0B4430DFCA8FBFD" box="[724,781,1062,1088]" italics="true" pageId="63" pageNumber="64">et al.</emphasis>
|
||
(2011)
|
||
</bibRefCitation>
|
||
. Herein the question mark that was positioned after the genus name by
|
||
<bibRefCitation id="41755CB3CD5B6A59F38B4360FD78FBDE" author="Kroger B. & Ebbestad J. O. R. & Hogstrom A. E. S. & Frisk A. M." box="[491,733,1097,1124]" pageId="63" pageNumber="64" pagination="35 - 53" refId="ref48453" refString="Kroger B., Ebbestad J. O. R., Hogstrom A. E. S. & Frisk A. M. 2011. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationship. Fossil Record 14: 35 - 53. http: // dx. doi. org / 10.1002 / mmng. 201000014" type="journal article" year="2011">
|
||
Kröger
|
||
<emphasis id="1790FD50CD5B6A59F0284360FD23FBDE" box="[584,646,1097,1123]" italics="true" pageId="63" pageNumber="64">et al.</emphasis>
|
||
(2011)
|
||
</bibRefCitation>
|
||
is omitted, because a comparison of known species of
|
||
<taxonomicName id="E2E45AC1CD5B6A59F2DD4346FEF4FB3B" authorityName="Flower" authorityYear="1962" box="[189,337,1132,1158]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="genus">
|
||
<emphasis id="1790FD50CD5B6A59F2DD4346FEF4FB3B" box="[189,337,1132,1158]" italics="true" pageId="63" pageNumber="64">Isorthoceras</emphasis>
|
||
</taxonomicName>
|
||
clearly indicates that this genus is characterized by the typical conch features that are listed above. The internal characters of the
|
||
<typeStatus id="FA5F9FE0CD5B6A59F00B43BAFD3BFB17" box="[619,670,1168,1194]" pageId="63" pageNumber="64">type</typeStatus>
|
||
of this species are still not known, but the external features are so similar to those of other species of the genus, that it justifies assigning
|
||
<taxonomicName id="E2E45AC1CD5B6A59F67C4399FB06FB71" authorityName="Hall" authorityYear="1877" box="[1052,1187,1203,1229]" class="Cephalopoda" family="Geisonoceratidae" genus="Geisonoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="species" species="junceum">
|
||
<emphasis id="1790FD50CD5B6A59F67C4399FB94FB70" box="[1052,1073,1203,1229]" italics="true" pageId="63" pageNumber="64">O</emphasis>
|
||
.
|
||
<emphasis id="1790FD50CD5B6A59F6204399FB06FB71" box="[1088,1187,1203,1228]" italics="true" pageId="63" pageNumber="64">junceum</emphasis>
|
||
</taxonomicName>
|
||
to
|
||
<taxonomicName id="E2E45AC1CD5B6A59F6A84399FAF9FB70" authorityName="Flower" authorityYear="1962" box="[1224,1372,1203,1229]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="genus">
|
||
<emphasis id="1790FD50CD5B6A59F6A84399FAF9FB70" box="[1224,1372,1203,1229]" italics="true" pageId="63" pageNumber="64">Isorthoceras</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD43DEFEFDFAB3" blockId="63.[189,344,1268,1294]" box="[189,344,1268,1294]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD43DEFEFDFAB3" bold="true" box="[189,344,1268,1294]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
|
||
<emphasis id="1790FD50CD5B6A59F2DD43DEFEFDFAB3" bold="true" box="[189,344,1268,1294]" pageId="63" pageNumber="64">Comparison</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD4209FEC0FA1A" blockId="63.[189,1399,1314,1447]" pageId="63" pageNumber="64">
|
||
<taxonomicName id="E2E45AC1CD5B6A59F2DD4209FD24FA80" authority="(Foerste, 1932)" baseAuthorityName="Foerste" baseAuthorityYear="1932" box="[189,641,1315,1341]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="species" species="romingeri">
|
||
<emphasis id="1790FD50CD5B6A59F2DD4209FE6EFA81" box="[189,459,1315,1341]" italics="true" pageId="63" pageNumber="64">Isorthoceras romingeri</emphasis>
|
||
(
|
||
<bibRefCitation id="41755CB3CD5B6A59F3B84209FDDCFA80" author="Foerste A. F." box="[472,633,1315,1341]" pageId="63" pageNumber="64" pagination="47 - 136" refId="ref47686" refString="Foerste A. F. 1932. Black River and other cephalopods from Minnesota, Wisconsin, Michigan, and Ontario (Part 1). Journal of the Scientific Laboratories of Denison University 27: 47 - 136." type="journal article" year="1932">Foerste, 1932</bibRefCitation>
|
||
)
|
||
</taxonomicName>
|
||
is a finely transversely striated
|
||
<taxonomicName id="E2E45AC1CD5B6A59F18A4209FBDBFA80" authorityName="Flower" authorityYear="1962" box="[1002,1150,1315,1341]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="63" pageNumber="64" phylum="Mollusca" rank="genus">
|
||
<emphasis id="1790FD50CD5B6A59F18A4209FBDBFA80" box="[1002,1150,1315,1341]" italics="true" pageId="63" pageNumber="64">Isorthoceras</emphasis>
|
||
</taxonomicName>
|
||
from the Black River Formation of
|
||
<collectingRegion id="E720EFA0CD5B6A59F301426CFE45FADD" box="[353,480,1350,1376]" country="United States of America" name="Minnesota" pageId="63" pageNumber="64">Minnesota</collectingRegion>
|
||
,
|
||
<collectingCountry id="5DF361D2CD5B6A59F38E426CFD89FADD" box="[494,556,1350,1376]" name="United States of America" pageId="63" pageNumber="64">USA</collectingCountry>
|
||
, which differs in having a larger adult size (more than
|
||
<quantity id="E21C8CA7CD5B6A59F6DE426CFAB7FADD" box="[1214,1298,1350,1376]" metricMagnitude="-2" metricUnit="m" metricValue="1.7" pageId="63" pageNumber="64" unit="mm" value="17.0">17 mm</quantity>
|
||
in cross section) and a narrower chamber spacing (seven chambers occur per distance similar to corresponding cross section).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="6DFE72C9CD5B6A59F2DD42E7FBD2F93D" pageId="63" pageNumber="64" type="multiple">
|
||
<paragraph id="255B2142CD5B6A59F2DD42E7FDD8FA55" blockId="63.[189,637,1485,1512]" box="[189,637,1485,1512]" pageId="63" pageNumber="64">
|
||
<heading id="7E13962ECD5B6A59F2DD42E7FDD8FA55" bold="true" box="[189,637,1485,1512]" fontSize="11" level="3" pageId="63" pageNumber="64" reason="3">
|
||
<emphasis id="1790FD50CD5B6A59F2DD42E7FDD8FA55" bold="true" box="[189,637,1485,1512]" pageId="63" pageNumber="64">Stratigraphic and geographic range</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="255B2142CD5B6A59F2DD42D7FBD2F93D" blockId="63.[189,1399,1532,1664]" pageId="63" pageNumber="64">
|
||
Trenton Limestone, early Katian, from
|
||
<collectingRegion id="E720EFA0CD5B6A59F0E642D7FCA5F9AB" box="[646,768,1532,1559]" country="United States of America" name="New York" pageId="63" pageNumber="64">New York</collectingRegion>
|
||
,
|
||
<collectingCountry id="5DF361D2CD5B6A59F16B42D6FCE1F9AB" box="[779,836,1532,1558]" name="United States of America" pageId="63" pageNumber="64">USA</collectingCountry>
|
||
(
|
||
<bibRefCitation id="41755CB3CD5B6A59F13242D6FC69F9AB" author="Hall J." box="[850,972,1532,1558]" pageId="63" pageNumber="64" refId="ref48004" refString="Hall J. 1847. Natural History of New York, Paleontology, Volume 1, containing Descriptions of the Organic Remains of the Lower Division of the New-York System (Equivalent of the Lower Silurian Rocks of Europe). Van Benthuysen, Albany, New York." type="book" year="1847">Hall 1847</bibRefCitation>
|
||
); Rocklandian-Edenian, mid Katian, from north central
|
||
<collectingCountry id="5DF361D2CD5B6A59F3C04135FE7CF984" box="[416,473,1567,1593]" name="United States of America" pageId="63" pageNumber="64">USA</collectingCountry>
|
||
(
|
||
<bibRefCitation id="41755CB3CD5B6A59F38B4135FD32F984" author="Catalani J. A." box="[491,663,1567,1593]" pageId="63" pageNumber="64" pagination="187 - 189" refId="ref46838" refString="Catalani J. A. 1987. Biostratigraphy of the Middle and Upper Ordovician cephalopods of the Upper Mississippi Valley area. Minnesota Geological Survey Report of Investigations 35: 187 - 189." type="journal article" year="1987">Catalani 1987</bibRefCitation>
|
||
); Martinsburg Shale, late Katian (
|
||
<bibRefCitation id="41755CB3CD5B6A59F64D4135FB6BF984" author="Bassler R. S." box="[1069,1230,1567,1593]" pageId="63" pageNumber="64" pagination="277 - 331" refId="ref46616" refString="Bassler R. S. 1919. The Cambrian and Ordovician Deposits of Maryland. In: Bassler R. S. (ed.) Systematic Paleontology. Mollusca: 277 - 331. Maryland Geological Survey, Baltimore." type="book chapter" year="1919">Bassler 1919</bibRefCitation>
|
||
); Utica Shale, late Katian (
|
||
<bibRefCitation id="41755CB3CD5B6A59F3324168FE54F9E0" author="Flower R. H." box="[338,497,1602,1629]" pageId="63" pageNumber="64" pagination="3 - 547" refId="ref47424" refString="Flower R. H. 1946. Ordovician cephalopods from the Cincinnati region. Part 1. Bulletins of American Paleontology 26 (116): 3 - 547." type="journal article" year="1946">Flower 1946</bibRefCitation>
|
||
); Anderskyi bed, southern
|
||
<collectingCountry id="5DF361D2CD5B6A59F1584168FC61F9E1" box="[824,964,1602,1628]" name="Kazakhstan" pageId="63" pageNumber="64">Kazakhstan</collectingCountry>
|
||
, late Katian (
|
||
<bibRefCitation id="41755CB3CD5B6A59F6084168FA85F9E0" author="Balashov E. G." box="[1128,1312,1602,1629]" pageId="63" pageNumber="64" pagination="196 - 200" refId="ref46483" refString="Balashov E. G. 1956. Nautiloidei ordovika Chu-Iliiskich gor i Vet-Chak-Daly. Trudy Geologicheskogo Instituta, Akademia Nauk SSSR 1: 196 - 200." type="journal article" year="1956">Balashov 1956</bibRefCitation>
|
||
); Boda Limestone, late Katian-Glisstjärn Formation, Hirnantian, Siljan District,
|
||
<collectingCountry id="5DF361D2CD5B6A59F672414CFBD6F93D" box="[1042,1139,1638,1664]" name="Sweden" pageId="63" pageNumber="64">Sweden</collectingCountry>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |