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<document id="59DC7A70B5C6D8D33BDFB3F355016D82" 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="AD4D9054CD5C6A5FF0254529FD4EFE05" 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="Isorthoceras curvilineatum Kröger 2013, sp. nov." docType="treatment" docUuid="7B1F09EA-8B80-44EC-8F80-7E0EDD3F4E3D" docUuidSource="ZooBank" docVersion="9" lastPageNumber="58" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="57" 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="6AA98B6E58127AB1E14C3018AFBDBCB5">The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
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<mods:namePart id="CE6E6500EF6E91B3F725085D9AB2CF07">Kröger, Björn</mods:namePart>
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<mods:title id="B4B498EFFE56B7C2E736D2EA8C1981BF">European Journal of Taxonomy</mods:title>
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<mods:date id="7D83DC3B6A568E47278FE3FED9C07A56">2013</mods:date>
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<treatment id="AD4D9054CD5C6A5FF0254529FD4EFE05" ID-DOI="http://doi.org/10.5281/zenodo.3815141" ID-GBIF-Taxon="163977252" ID-Zenodo-Dep="3815141" LSID="urn:lsid:zoobank.org:act:7B1F09EA-8B80-44EC-8F80-7E0EDD3F4E3D" httpUri="http://treatment.plazi.org/id/AD4D9054CD5C6A5FF0254529FD4EFE05" lastPageId="57" lastPageNumber="58" pageId="56" pageNumber="57">
<subSubSection id="6DFE72C9CD5C6A5EF0254529FC4AFDA3" box="[581,1007,515,542]" pageId="56" pageNumber="57" type="nomenclature">
<paragraph id="255B2142CD5C6A5EF0254529FC4AFDA3" blockId="56.[362,1226,515,612]" box="[581,1007,515,542]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF0254529FC4AFDA3" box="[581,1007,515,542]" centered="true" fontSize="11" level="2" pageId="56" pageNumber="57" reason="2">
<taxonomicName id="E2E45AC1CD5C6A5EF0254529FC2BFDA3" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[581,910,515,542]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="species" species="curvilineatum" status="sp. nov.">
<emphasis id="1790FD50CD5C6A5EF0254529FC2BFDA3" bold="true" box="[581,910,515,542]" italics="true" pageId="56" pageNumber="57">Isorthoceras curvilineatum</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD5C6A5EF1F4452EFC4AFDA3" box="[916,1007,516,542]" pageId="56" pageNumber="57" rank="species">sp. nov.</taxonomicNameLabel>
</heading>
</paragraph>
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<subSubSection id="6DFE72C9CD5C6A5EF30A450CFCCBFDD9" pageId="56" pageNumber="57" type="description">
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urn:lsid:zoobank.org:act:
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</uri>
</paragraph>
<paragraph id="255B2142CD5C6A5EF0A54563FCCBFDD9" blockId="56.[362,1226,515,612]" box="[709,878,585,612]" pageId="56" pageNumber="57">
<figureCitation id="BDDF3DC7CD5C6A5EF0A54563FC90FDD9" box="[709,821,585,612]" 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 &amp; 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="56" pageNumber="57">Figs 17G</figureCitation>
,
<figureCitation id="BDDF3DC7CD5C6A5EF1204560FCCBFDD9" box="[832,878,586,612]" 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 &amp; 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="56" pageNumber="57">23F</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD45A1FB36FC80" pageId="56" pageNumber="57" type="diagnosis">
<paragraph id="255B2142CD5C6A5EF2DD45A1FE93FD18" blockId="56.[189,310,651,677]" box="[189,310,651,677]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD45A1FE93FD18" bold="true" box="[189,310,651,677]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD45A1FE93FD18" bold="true" box="[189,310,651,677]" pageId="56" pageNumber="57">Diagnosis</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4593FB36FC80" blockId="56.[189,1398,697,830]" pageId="56" pageNumber="57">
Transversally ornamented, straight
<taxonomicName id="E2E45AC1CD5C6A5EF0354590FD4CFD69" authorityName="Flower" authorityYear="1962" box="[597,745,698,724]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD5C6A5EF0354590FD4CFD69" box="[597,745,698,724]" italics="true" pageId="56" pageNumber="57">Isorthoceras</emphasis>
</taxonomicName>
with circular cross section and low angle of expansion of less than 2°. Ornamented with ca. ten rounded transverse striae per millimetre, which form characteristic shallow hyponomic sinus with two directly adjacent shallow salients. Adult size clearly less than ca.
<quantity id="E21C8CA7CD5C6A5EF739442AFF4EFC83" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="56" pageNumber="57" unit="mm" value="10.0">10 mm</quantity>
in cross section. Siphuncle central with diameter ca. 0.1 of conch cross section.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD444FFB9BFC10" box="[189,1086,869,942]" pageId="56" pageNumber="57" type="etymology">
<paragraph id="255B2142CD5C6A5EF2DD444FFEE1FCC2" blockId="56.[189,324,869,895]" box="[189,324,869,895]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD444FFEE1FCC2" bold="true" box="[189,324,869,895]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD444FFEE1FCC2" bold="true" box="[189,324,869,895]" pageId="56" pageNumber="57">Etymology</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD44B9FB9BFC10" blockId="56.[189,1086,915,942]" box="[189,1086,915,942]" pageId="56" pageNumber="57">Refers to the conspicuously curved transverse ornamentation of this species.</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD44FFFD6BFB17" pageId="56" pageNumber="57" type="materials_examined">
<paragraph id="255B2142CD5C6A5EF2DD44FFFEC9FC53" blockId="56.[189,364,980,1007]" box="[189,364,980,1007]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD44FFFEC9FC53" bold="true" box="[189,364,980,1007]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD44FFFEC9FC53" bold="true" box="[189,364,980,1007]" pageId="56" pageNumber="57">Type material</emphasis>
</heading>
</paragraph>
<materialsCitation id="958C2B1FCD5C6A5EF28A4329FEF0FBFD" ID-GBIF-Occurrence="2610779309" collectionCode="PMU" pageId="56" pageNumber="57" specimenCode="PMU 26787" specimenCount="1" typeStatus="holotype">
<paragraph id="255B2142CD5C6A5EF28A4329FEF9FBA0" blockId="56.[189,1398,1027,1194]" box="[234,348,1027,1053]" pageId="56" pageNumber="57">
<emphasis id="1790FD50CD5C6A5EF28A4329FEF9FBA0" bold="true" box="[234,348,1027,1053]" pageId="56" pageNumber="57">
<typeStatus id="FA5F9FE0CD5C6A5EF28A4329FEF9FBA0" box="[234,348,1027,1053]" pageId="56" pageNumber="57" type="holotype">Holotype</typeStatus>
</emphasis>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD430DFEF0FBFD" blockId="56.[189,1398,1027,1194]" box="[189,341,1062,1089]" pageId="56" pageNumber="57">
<specimenCode id="75428939CD5C6A5EF2DD430DFEF4FBFD" box="[189,337,1062,1089]" pageId="56" pageNumber="57">PMU 26787</specimenCode>
.
</paragraph>
</materialsCitation>
<paragraph id="255B2142CD5C6A5EF28A4360FEC2FBD9" blockId="56.[189,1398,1027,1194]" box="[234,359,1098,1124]" pageId="56" pageNumber="57">
<emphasis id="1790FD50CD5C6A5EF28A4360FEC2FBD9" bold="true" box="[234,359,1098,1124]" pageId="56" pageNumber="57">
<typeStatus id="FA5F9FE0CD5C6A5EF28A4360FEC2FBD9" box="[234,359,1098,1124]" pageId="56" pageNumber="57" type="paratype">Paratypes</typeStatus>
</emphasis>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4347FD6BFB17" blockId="56.[189,1398,1027,1194]" pageId="56" pageNumber="57">
Two
<typeStatus id="FA5F9FE0CD5C6A5EF29C4347FED4FB3A" box="[252,369,1133,1159]" pageId="56" pageNumber="57" type="paratype">paratypes</typeStatus>
:
<collectionCode id="43F5B987CD5C6A5EF3E14347FE64FB3A" box="[385,449,1133,1159]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="56" pageNumber="57">PMU</collectionCode>
26788 and 26789, Osmundsberget, Siljan District,
<collectingCountry id="5DF361D2CD5C6A5EF6594347FB3FFB3A" box="[1081,1178,1133,1159]" name="Sweden" pageId="56" pageNumber="57">Sweden</collectingCountry>
; Boda Limestone, Boda Core Member, late Katian, Ordovician.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD43F8FAD2FAA7" pageId="56" pageNumber="57" type="distribution">
<paragraph id="255B2142CD5C6A5EF2DD43F8FE5EFB56" blockId="56.[189,507,1233,1260]" box="[189,507,1233,1260]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD43F8FE5EFB56" bold="true" box="[189,507,1233,1260]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD43F8FE5EFB56" bold="true" box="[189,507,1233,1260]" pageId="56" pageNumber="57">Type locality and horizon</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD422AFAD2FAA7" blockId="56.[189,1399,1280,1306]" box="[189,1399,1280,1306]" pageId="56" pageNumber="57">
Osmundsberget, Siljan District,
<collectingCountry id="5DF361D2CD5C6A5EF053422AFD36FAA7" box="[563,659,1280,1306]" name="Sweden" pageId="56" pageNumber="57">Sweden</collectingCountry>
, Boda Limestone, Boda Core Member, late Katian, Ordovician.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD426BFAACF97F" pageId="56" pageNumber="57" type="description">
<paragraph id="255B2142CD5C6A5EF2DD426BFEEBFAE6" blockId="56.[189,334,1345,1371]" box="[189,334,1345,1371]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD426BFEEBFAE6" bold="true" box="[189,334,1345,1371]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD426BFEEBFAE6" bold="true" box="[189,334,1345,1371]" pageId="56" pageNumber="57">Description</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD425AFEC1F9AA" blockId="56.[189,1399,1392,1559]" pageId="56" pageNumber="57">
Three specimen from Osmundsberget (PMU 26787–26789) are very similar to each other, with a very low angle of expansion of less than 2°, conch diameters between 6 and
<quantity id="E21C8CA7CD5C6A5EF66142B9FBE0FA13" box="[1025,1093,1427,1454]" metricMagnitude="-3" metricUnit="m" metricValue="8.0" pageId="56" pageNumber="57" unit="mm" value="8.0">8 mm</quantity>
and a very fine transverse ornamentation, with ca. ten rounded striae per millimetre (
<figureCitation id="BDDF3DC7CD5C6A5EF11F429CFC4AFA6D" box="[895,1007,1462,1488]" 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 &amp; 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="56" pageNumber="57">Fig. 17G</figureCitation>
). The striae are laterally slightly oblique, and form a shallow hyponomic sinus with two directly adjacent shallow projections on the left and right side.
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4114FAACF97F" blockId="56.[189,1399,1598,1730]" pageId="56" pageNumber="57">
The
<typeStatus id="FA5F9FE0CD5C6A5EF2924114FEFCF9E5" box="[242,345,1598,1624]" pageId="56" pageNumber="57" type="holotype">holotype</typeStatus>
is a fragment of parts of a phragmocone and body chamber with a length of
<quantity id="E21C8CA7CD5C6A5EF6BE4114FA94F9E4" box="[1246,1329,1598,1625]" metricMagnitude="-2" metricUnit="m" metricValue="3.5" pageId="56" pageNumber="57" unit="mm" value="35.0">35 mm</quantity>
and a diameter of
<quantity id="E21C8CA7CD5C6A5EF32B414BFE7CF9C1" box="[331,473,1633,1660]" metricMagnitude="-3" metricUnit="m" metricValue="6.7" metricValueMax="7.2" metricValueMin="6.2" pageId="56" pageNumber="57" unit="mm" value="6.7" valueMax="7.2" valueMin="6.2">6.2–7.2 mm</quantity>
(angle of expansion 1.6°) (
<figureCitation id="BDDF3DC7CD5C6A5EF17B414BFC21F9C6" box="[795,900,1633,1659]" 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 &amp; 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="56" pageNumber="57">Fig. 23F</figureCitation>
). The siphuncle is central, with a diameter of the septal perforation of
<quantity id="E21C8CA7CD5C6A5EF06341AEFDFBF922" box="[515,606,1668,1695]" metricMagnitude="-4" metricUnit="m" metricValue="6.0" pageId="56" pageNumber="57" unit="mm" value="0.6">0.6 mm</quantity>
at the apical end of the fragment. The length of the body chamber cannot be measured, because no traces of septa are visible in the middle parts of the
<typeStatus id="FA5F9FE0CD5C6A5EF6FB4182FAA3F97F" box="[1179,1286,1704,1730]" pageId="56" pageNumber="57" type="holotype">holotype</typeStatus>
.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5FF2A441C3FDA1FEF5" lastPageId="57" lastPageNumber="58" pageId="56" pageNumber="57" type="discussion">
<paragraph id="255B2142CD5C6A5EF2A441C3FE93F8BE" blockId="56.[196,310,1769,1795]" box="[196,310,1769,1795]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2A441C3FE93F8BE" bold="true" box="[196,310,1769,1795]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2A441C3FE93F8BE" bold="true" box="[196,310,1769,1795]" pageId="56" pageNumber="57">Remarks</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4032FB5CF8E8" blockId="56.[189,1398,1816,1878]" pageId="56" pageNumber="57">
A very small adult size of less than
<quantity id="E21C8CA7CD5C6A5EF0044032FD1DF88F" box="[612,696,1816,1842]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="56" pageNumber="57" unit="mm" value="10.0">10 mm</quantity>
is assumed for this species, based on the very low angle of expansion, which is only 0.7° in the largest specimen, with a maximum diameter of
<quantity id="E21C8CA7CD5C6A5EF6F74011FB51F8E8" box="[1175,1268,1851,1878]" metricMagnitude="-3" metricUnit="m" metricValue="7.5" pageId="56" pageNumber="57" unit="mm" value="7.5">7.5 mm</quantity>
.
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4056FAD3F860" blockId="56.[189,1398,1916,2013]" pageId="56" pageNumber="57">
This species is assigned within
<taxonomicName id="E2E45AC1CD5C6A5EF0584056FD69F82B" authorityName="Flower" authorityYear="1962" box="[568,716,1916,1942]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD5C6A5EF0584056FD69F82B" box="[568,716,1916,1942]" italics="true" pageId="56" pageNumber="57">Isorthoceras</emphasis>
</taxonomicName>
because the general conch shape is very similar to other small species of
<taxonomicName id="E2E45AC1CD5C6A5EF31B40B5FDAAF804" authorityName="Flower" authorityYear="1962" box="[379,527,1951,1977]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD5C6A5EF31B40B5FDAAF804" box="[379,527,1951,1977]" italics="true" pageId="56" pageNumber="57">Isorthoceras</emphasis>
</taxonomicName>
, such
<taxonomicName id="E2E45AC1CD5C6A5EF038408AFD6AF804" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[600,719,1951,1978]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD5C6A5EF038408AFDC7F804" box="[600,610,1952,1977]" italics="true" pageId="56" pageNumber="57">I</emphasis>
.
<emphasis id="1790FD50CD5C6A5EF00F40B5FD6AF804" box="[623,719,1951,1977]" italics="true" pageId="56" pageNumber="57">angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD5C6A5EF0B4408AFC88F807" box="[724,813,1952,1978]" pageId="56" pageNumber="57" rank="species">sp. nov.</taxonomicNameLabel>
However, some uncertainty remains in the generic assignment, because the internal characters are not known. A similar narrow, transverse ornamentation
</paragraph>
<paragraph id="255B2142CD5D6A5FF2DD4621FDA1FEF5" blockId="57.[189,1398,267,329]" pageId="57" pageNumber="58">
is known from
<taxonomicName id="E2E45AC1CD5D6A5FF3184621FC03FE98" authority="(Portlock, 1843)" authorityName="Kröger" authorityYear="2013" baseAuthorityName="Portlock" baseAuthorityYear="1843" box="[376,934,267,293]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="57" pageNumber="58" phylum="Mollusca" rank="species" species="elongatocinctum" status="comb. nov.">
<emphasis id="1790FD50CD5D6A5FF3184621FD7FFE98" box="[376,730,267,293]" italics="true" pageId="57" pageNumber="58">Isorthoceras elongatocinctum</emphasis>
(
<bibRefCitation id="41755CB3CD5D6A5FF08C4621FC3BFE98" author="Portlock J. E." box="[748,926,267,293]" pageId="57" pageNumber="58" refId="ref48871" refString="Portlock J. E. 1843. Report on the Geology of the County of Londonderry and of parts of Tyrone and Fermanagh. Andrew Milliken, Dublin." type="book" year="1843">Portlock, 1843</bibRefCitation>
)
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD5D6A5FF1D14621FB9DFE9B" box="[945,1080,267,294]" pageId="57" pageNumber="58" rank="species">comb. nov.</taxonomicNameLabel>
, which differs in having a directly transverse striation.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5D6A5FF2DD465AFD4EFE05" pageId="57" pageNumber="58" type="multiple">
<paragraph id="255B2142CD5D6A5FF2DD465AFDD8FE37" blockId="57.[189,637,368,394]" box="[189,637,368,394]" pageId="57" pageNumber="58">
<heading id="7E13962ECD5D6A5FF2DD465AFDD8FE37" bold="true" box="[189,637,368,394]" fontSize="11" level="3" pageId="57" pageNumber="58" reason="3">
<emphasis id="1790FD50CD5D6A5FF2DD465AFDD8FE37" bold="true" box="[189,637,368,394]" pageId="57" pageNumber="58">Stratigraphic and geographic range</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5D6A5FF2DD46B4FD4EFE05" blockId="57.[189,747,414,440]" box="[189,747,414,440]" pageId="57" pageNumber="58">
Boda Limestone, late Katian,
<collectingRegion id="E720EFA0CD5D6A5FF07B46B4FDDEFE05" box="[539,635,414,440]" country="Sweden" name="Dalarna" pageId="57" pageNumber="58">Dalarna</collectingRegion>
,
<collectingCountry id="5DF361D2CD5D6A5FF0E746B4FD4DFE05" box="[647,744,414,440]" name="Sweden" pageId="57" pageNumber="58">Sweden</collectingCountry>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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