plazi/treatments-xml
2
0
Fork 0
Code Issues Pull requests Releases Activity
treatments-xml/data/AD/4D/90/AD4D9054CD516A5EF0084195FD4EFE61.xml
maintenance ba8dd8ee5d added AD
2024-06-21 12:47:39 +02:00

342 lines
46 KiB
XML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<document id="8BDE8BC308C1A58615DBE376CFD681A5" 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="AD4D9054CD516A5EF0084195FD4EFE61" 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 angelini Kröger 2013, sp. nov." docType="treatment" docUuid="D60B4D34-B324-4F4B-817D-2EBE1F0F09BA" docUuidSource="ZooBank" docVersion="9" lastPageNumber="57" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="54" updateTime="1698838944441" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-3.0" zenodo-license-figures="CC-BY-3.0" zenodo-license-treatments="UNSPECIFIED">
<mods:mods id="7A1B58466F531B4A44E37ACEF9E6F61E" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="9DB4D75AD7E27546DB36203212479168">
<mods:title id="20F37E5C2B9AE2C613CE66BAEC644516">The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
</mods:titleInfo>
<mods:name id="FBBDBD04BBCAC84D8182C1CA2C205ACD" type="personal">
<mods:role id="37A60529AB00F8BE339CE0C7939CF04D">
<mods:roleTerm id="A85759DABBB754CF0BBB8B566FA3524C">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="3D8929375A74215425F6648D2D29AED6">Kröger, Björn</mods:namePart>
</mods:name>
<mods:typeOfResource id="A53F8C8ACC8D175B997E97CC29CD2E3E">text</mods:typeOfResource>
<mods:relatedItem id="6E122A7EA7F5EB27A53F563280439FE8" type="host">
<mods:titleInfo id="3AACDF7B1BC4C97C912437DCE9098E57">
<mods:title id="E0C500891C5B14CD2A1A0865C6EDBC5A">European Journal of Taxonomy</mods:title>
</mods:titleInfo>
<mods:part id="7F45853639517E3FC3EC42521E1BC34E">
<mods:date id="B065A565BE98709C1981816483DDC8B2">2013</mods:date>
<mods:detail id="FDDF800FC57CA594393E7FFC0C3B07A2" type="pubDate">
<mods:number id="A68E3049056BA7EFE86FC803DA1338E1">2013-03-27</mods:number>
</mods:detail>
<mods:detail id="961D4E1C87AFF79E8E061C113D6DBA8A" type="issue">
<mods:number id="2890390EDC857EBAC222C1B63B22B6A1">41</mods:number>
</mods:detail>
<mods:extent id="F4D5B262133708E115154224F0046E01" unit="page">
<mods:start id="62A63D638228788F7DECEAA481363B78">1</mods:start>
<mods:end id="415974545EF9885325A65290325CD8FE">110</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:classification id="EE8600CA42330004F1A170B7C9C4EF5F">journal article</mods:classification>
<mods:identifier id="DC862E8DF51D685644ED566FA1C8FEC9" type="CLB-Dataset">22319</mods:identifier>
<mods:identifier id="723C205153A97178ED897AB5A5F33D09" type="DOI">10.5852/ejt.2013.41</mods:identifier>
<mods:identifier id="4EAF85D09FA8739117BB9C1701B71C76" type="GBIF-Dataset">386010a0-6da4-4fa3-9d1a-4b3b5427cac5</mods:identifier>
<mods:identifier id="F45D531D5DA3AA476EFBA45C75BBCCD1" type="ISSN">2118-9773</mods:identifier>
<mods:identifier id="C159614CB7100EB0493CA513200A2D8B" type="Zenodo-Dep">3814221</mods:identifier>
<mods:identifier id="E28F10A868C1FD52D677F88102B25751" type="ZooBank">A2F1B9ED-870A-466E-B35E-BD5DA782476E</mods:identifier>
</mods:mods>
<treatment id="AD4D9054CD516A5EF0084195FD4EFE61" ID-DOI="http://doi.org/10.5281/zenodo.3815123" ID-GBIF-Taxon="163977258" ID-Zenodo-Dep="3815123" LSID="urn:lsid:zoobank.org:act:D60B4D34-B324-4F4B-817D-2EBE1F0F09BA" httpUri="http://treatment.plazi.org/id/AD4D9054CD516A5EF0084195FD4EFE61" lastPageId="56" lastPageNumber="57" pageId="53" pageNumber="54">
<subSubSection id="6DFE72C9CD516A53F0084195FC69F967" box="[616,972,1727,1754]" pageId="53" pageNumber="54" type="nomenclature">
<paragraph id="255B2142CD516A53F0084195FC69F967" blockId="53.[362,1226,1727,1824]" box="[616,972,1727,1754]" pageId="53" pageNumber="54">
<heading id="7E13962ECD516A53F0084195FC69F967" box="[616,972,1727,1754]" centered="true" fontSize="11" level="2" pageId="53" pageNumber="54" reason="2">
<taxonomicName id="E2E45AC1CD516A53F0084195FCCFF967" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[616,874,1727,1754]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="53" pageNumber="54" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD516A53F0084195FCCFF967" bold="true" box="[616,874,1727,1754]" italics="true" pageId="53" pageNumber="54">Isorthoceras angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD516A53F11141EAFC69F967" box="[881,972,1728,1754]" pageId="53" pageNumber="54" rank="species">sp. nov.</taxonomicNameLabel>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD516A53F30A41C8FC62F89D" pageId="53" pageNumber="54" type="description">
<paragraph id="255B2142CD516A53F30A41C8FB6FF941" blockId="53.[362,1226,1727,1824]" box="[362,1226,1762,1788]" pageId="53" pageNumber="54">
<uri id="51752D40CD516A53F30A41C8FB6FF941" box="[362,1226,1762,1788]" pageId="53" pageNumber="54">
urn:lsid:zoobank.org:act:
<uuid id="51421B97CD516A53F0EB41C8FB6FF941" box="[651,1226,1762,1788]" pageId="53" pageNumber="54">D60B4D34-B324-4F4B-817D-2EBE1F0F09BA</uuid>
</uri>
</paragraph>
<paragraph id="255B2142CD516A53F00C402FFC62F89D" blockId="53.[362,1226,1727,1824]" box="[620,967,1797,1824]" pageId="53" pageNumber="54">
<figureCitation id="BDDF3DC7CD516A53F00C402FFD7EF89D" box="[620,731,1797,1824]" 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 &amp; 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="53" pageNumber="54">Figs 13D</figureCitation>
,
<figureCitation id="BDDF3DC7CD516A53F087402CFCB9F89D" box="[743,796,1798,1824]" captionStart="Fig" captionStartId="27.[189,232,1827,1853]" captionTargetBox="[200,1393,1425,1772]" captionTargetId="graphics@27.[350,920,1435,1742]" captionTargetPageId="27" captionText="Fig. 14. Reconstructions of the details of the septal necks and siphuncular segments of Orthocerida of the Boda Limestone. Note the different septal thicknesses. A. Striatocycloceras isbergi sp. nov., PMU 26681, Kallholn. B. Dawsonoceras fenestratum (Eichwald, 1860), PMU 26706, Kallholn. C. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo 150102c, Osmundsberget. D. Isorthoceras angelini sp. nov., PMU 26784, Kallholn." figureDoi="http://doi.org/10.5281/zenodo.3814253" httpUri="https://zenodo.org/record/3814253/files/figure.png" pageId="53" pageNumber="54">14D</figureCitation>
,
<figureCitation id="BDDF3DC7CD516A53F148402CFCF8F89D" box="[808,861,1798,1824]" 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="53" pageNumber="54">17H</figureCitation>
,
<figureCitation id="BDDF3DC7CD516A53F109402CFC3AF89D" box="[873,927,1798,1824]" 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="53" pageNumber="54">23G</figureCitation>
,
<figureCitation id="BDDF3DC7CD516A53F1CA402FFC62F89D" box="[938,967,1797,1824]" captionStart="Fig" captionStartId="54.[189,232,1909,1935]" captionTargetBox="[309,1298,1084,1851]" captionTargetId="graphics@54.[427,1298,1084,1717]" captionTargetPageId="54" captionText="Fig. 25. Variability of the angle of expansion in fragments of different diameters of Isorthoceras angelini sp. nov. Note the tendency of decreasing angle of expansion with diameter. The adult diameter is reached at ca. 15 mm." figureDoi="http://doi.org/10.5281/zenodo.3814275" httpUri="https://zenodo.org/record/3814275/files/figure.png" pageId="53" pageNumber="54">25</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD516A50F2DD406DFBAFFED1" lastPageId="54" lastPageNumber="55" pageId="53" pageNumber="54" type="diagnosis">
<paragraph id="255B2142CD516A53F2DD406DFE93F8DC" blockId="53.[189,310,1863,1889]" box="[189,310,1863,1889]" pageId="53" pageNumber="54">
<heading id="7E13962ECD516A53F2DD406DFE93F8DC" bold="true" box="[189,310,1863,1889]" fontSize="11" level="3" pageId="53" pageNumber="54" reason="3">
<emphasis id="1790FD50CD516A53F2DD406DFE93F8DC" bold="true" box="[189,310,1863,1889]" pageId="53" pageNumber="54">Diagnosis</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD516A50F2DD405FFBAFFED1" blockId="53.[189,1399,1909,2006]" lastBlockId="54.[189,1399,267,364]" lastPageId="54" lastPageNumber="55" pageId="53" pageNumber="54">
<taxonomicName id="E2E45AC1CD516A53F2DD405FFEF4F832" authorityName="Flower" authorityYear="1962" box="[189,337,1909,1935]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="53" pageNumber="54" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD516A53F2DD405FFEF4F832" box="[189,337,1909,1935]" italics="true" pageId="53" pageNumber="54">Isorthoceras</emphasis>
</taxonomicName>
with weakly curved conch with circular or slightly compressed cross section; angle of expansion decreases with conch size, ca. 7–9° in premature growth stages; ornamented with fine longitudinal raised lirae and irregularly spaced transverse lirae; transverse lirae form shallow sinus on concave side of conch curvature; conch very weakly, irregularly undulated; mature size ca.
<quantity id="E21C8CA7CD526A50F7794621FAD7FE9B" box="[1305,1394,267,294]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="54" pageNumber="55" unit="mm" value="15.0">15 mm</quantity>
; position of siphuncle subcentral in early growth stages and eccentric at convex side of conch curvature in late growth stages, septal necks are suborthochoanitic-cyrtochoanitic.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD526A50F2DD46B9FB81FE42" pageId="54" pageNumber="55" type="etymology">
<paragraph id="255B2142CD526A50F2DD46B9FEE1FE10" blockId="54.[189,324,403,429]" box="[189,324,403,429]" pageId="54" pageNumber="55">
<heading id="7E13962ECD526A50F2DD46B9FEE1FE10" bold="true" box="[189,324,403,429]" fontSize="11" level="3" pageId="54" pageNumber="55" reason="3">
<emphasis id="1790FD50CD526A50F2DD46B9FEE1FE10" bold="true" box="[189,324,403,429]" pageId="54" pageNumber="55">Etymology</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD526A50F2DD46E8FB81FE42" blockId="54.[189,1398,449,511]" pageId="54" pageNumber="55">
In honour of Nils Peter Angelin (
<date id="515A0782CD526A50F05946EBFD67FE61" box="[569,706,449,476]" pageId="54" pageNumber="55" value="1805" valueMax="1876">1805–1876</date>
), a Swedish geologist and paleontologist, for his pioneering work on the Swedish palaeozoic fossils (e.g.,
<bibRefCitation id="41755CB3CD526A50F0B346CFFBB0FE42" author="Angelin N. P. &amp; Lindstrom G." box="[723,1045,485,511]" pageId="54" pageNumber="55" refId="ref46414" refString="Angelin N. P. &amp; Lindstrom G. 1880. Fragmenta Silurica. Samson and Wallin, Stockholm." type="book" year="1880">Angelin &amp; Lindström 1880</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD526A50F2DD450DFB78FD65" pageId="54" pageNumber="55" type="materials_examined">
<paragraph id="255B2142CD526A50F2DD450DFEC9FDFD" blockId="54.[189,364,550,577]" box="[189,364,550,577]" pageId="54" pageNumber="55">
<heading id="7E13962ECD526A50F2DD450DFEC9FDFD" bold="true" box="[189,364,550,577]" fontSize="11" level="3" pageId="54" pageNumber="55" reason="3">
<emphasis id="1790FD50CD526A50F2DD450DFEC9FDFD" bold="true" box="[189,364,550,577]" pageId="54" pageNumber="55">Type material</emphasis>
</heading>
</paragraph>
<materialsCitation id="958C2B1FCD526A50F28A457FFEF0FD2F" ID-GBIF-Occurrence="2610779314" collectionCode="PMU" pageId="54" pageNumber="55" specimenCode="PMU 26774" specimenCount="1" typeStatus="holotype">
<paragraph id="255B2142CD526A50F28A457FFEF9FDD2" blockId="54.[189,1245,597,729]" box="[234,348,597,623]" pageId="54" pageNumber="55">
<emphasis id="1790FD50CD526A50F28A457FFEF9FDD2" bold="true" box="[234,348,597,623]" pageId="54" pageNumber="55">
<typeStatus id="FA5F9FE0CD526A50F28A457FFEF9FDD2" box="[234,348,597,623]" pageId="54" pageNumber="55" type="holotype">Holotype</typeStatus>
</emphasis>
</paragraph>
<paragraph id="255B2142CD526A50F2DD4553FEF0FD2F" blockId="54.[189,1245,597,729]" box="[189,341,632,659]" pageId="54" pageNumber="55">
<specimenCode id="75428939CD526A50F2DD4553FEF4FD2F" box="[189,337,632,659]" pageId="54" pageNumber="55">PMU 26774</specimenCode>
.
</paragraph>
</materialsCitation>
<paragraph id="255B2142CD526A50F28A45B1FEC2FD08" blockId="54.[189,1245,597,729]" box="[234,359,667,693]" pageId="54" pageNumber="55">
<emphasis id="1790FD50CD526A50F28A45B1FEC2FD08" bold="true" box="[234,359,667,693]" pageId="54" pageNumber="55">
<typeStatus id="FA5F9FE0CD526A50F28A45B1FEC2FD08" box="[234,359,667,693]" pageId="54" pageNumber="55" type="paratype">Paratypes</typeStatus>
</emphasis>
</paragraph>
<paragraph id="255B2142CD526A50F2DD4594FB78FD65" blockId="54.[189,1245,597,729]" box="[189,1245,702,729]" pageId="54" pageNumber="55">
Twelve
<typeStatus id="FA5F9FE0CD526A50F37A4595FE2AFD64" box="[282,399,703,729]" pageId="54" pageNumber="55" type="paratype">paratypes</typeStatus>
:
<collectionCode id="43F5B987CD526A50F3FA4595FE7FFD64" box="[410,474,703,729]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="54" pageNumber="55">PMU</collectionCode>
26775–26786, Kallholn,
<collectingRegion id="E720EFA0CD526A50F1664594FCC3FD65" box="[774,870,702,728]" country="Sweden" name="Dalarna" pageId="54" pageNumber="55">Dalarna</collectingRegion>
, Boda Limestone, latest Katian.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD526A50F2DD442AFAD2FCF5" pageId="54" pageNumber="55" type="distribution">
<paragraph id="255B2142CD526A50F2DD442AFE5EFCA7" blockId="54.[189,507,768,794]" box="[189,507,768,794]" pageId="54" pageNumber="55">
<heading id="7E13962ECD526A50F2DD442AFE5EFCA7" bold="true" box="[189,507,768,794]" fontSize="11" level="3" pageId="54" pageNumber="55" reason="3">
<emphasis id="1790FD50CD526A50F2DD442AFE5EFCA7" bold="true" box="[189,507,768,794]" pageId="54" pageNumber="55">Type locality and horizon</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD526A50F2DD4404FAD2FCF5" blockId="54.[189,1399,814,841]" box="[189,1399,814,841]" pageId="54" pageNumber="55">
Kallholn, Siljan district,
<collectingRegion id="E720EFA0CD526A50F3B64404FD93FCF5" box="[470,566,814,840]" country="Sweden" name="Dalarna" pageId="54" pageNumber="55">Dalarna</collectingRegion>
,
<collectingCountry id="5DF361D2CD526A50F05F4404FD05FCF5" box="[575,672,814,840]" name="Sweden" pageId="54" pageNumber="55">Sweden</collectingCountry>
; Boda Limestone, Boda Core Member, late Katian, Ordovician.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD526A51F2DD445AFAC2FBD9" lastPageId="55" lastPageNumber="56" pageId="54" pageNumber="55" type="description">
<paragraph id="255B2142CD526A50F2DD445AFEEBFC37" blockId="54.[189,334,880,906]" box="[189,334,880,906]" pageId="54" pageNumber="55">
<heading id="7E13962ECD526A50F2DD445AFEEBFC37" bold="true" box="[189,334,880,906]" fontSize="11" level="3" pageId="54" pageNumber="55" reason="3">
<emphasis id="1790FD50CD526A50F2DD445AFEEBFC37" bold="true" box="[189,334,880,906]" pageId="54" pageNumber="55">Description</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD526A50F2DD44B4FAD2FC61" blockId="54.[189,1399,926,988]" pageId="54" pageNumber="55">
The
<typeStatus id="FA5F9FE0CD526A50F29344B4FEF8FC05" box="[243,349,926,952]" pageId="54" pageNumber="55" type="holotype">holotype</typeStatus>
, PMU 26774, is a
<quantity id="E21C8CA7CD526A50F05E44B5FD37FC04" box="[574,658,927,953]" metricMagnitude="-2" metricUnit="m" metricValue="4.0" pageId="54" pageNumber="55" unit="mm" value="40.0">40 mm</quantity>
long fragment of a phragmocone with a circular cross section and a diameter which is
<quantity id="E21C8CA7CD526A50F38C44EBFDC2FC61" box="[492,615,961,988]" metricMagnitude="-3" metricUnit="m" metricValue="7.4" metricValueMax="9.0" metricValueMin="5.8" pageId="54" pageNumber="55" unit="mm" value="7.4" valueMax="9.0" valueMin="5.8">5.8–9 mm</quantity>
of a length of
<quantity id="E21C8CA7CD526A50F14444E8FCDEFC61" box="[804,891,962,988]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="54" pageNumber="55" unit="mm" value="30.0">30 mm</quantity>
(angle of expansion 9.1) (
<figureCitation id="BDDF3DC7CD526A50F6A044E8FA97FC61" box="[1216,1330,962,988]" 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="54" pageNumber="55">Fig. 23G</figureCitation>
). The
</paragraph>
<caption id="719B71CACD526A50F2DD405FFEF9F86B" ID-DOI="http://doi.org/10.5281/zenodo.3814275" ID-Zenodo-Dep="3814275" httpUri="https://zenodo.org/record/3814275/files/figure.png" pageId="54" pageNumber="55" startId="54.[189,232,1909,1935]" targetBox="[309,1298,1084,1851]" targetPageId="54">
<paragraph id="255B2142CD526A50F2DD405FFEF9F86B" blockId="54.[189,1398,1909,2007]" pageId="54" pageNumber="55">
<emphasis id="1790FD50CD526A50F2DD405FFEBDF832" bold="true" box="[189,280,1909,1935]" pageId="54" pageNumber="55">Fig. 25.</emphasis>
Variability of the angle of expansion in fragments of different diameters of
<taxonomicName id="E2E45AC1CD526A50F61C405CFAD3F82D" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[1148,1398,1910,1936]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="54" pageNumber="55" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD526A50F61C405CFAD3F82D" box="[1148,1398,1910,1936]" italics="true" pageId="54" pageNumber="55">Isorthoceras angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD526A50F2DD40B3FEB3F80E" box="[189,278,1945,1971]" pageId="54" pageNumber="55" rank="species">sp. nov.</taxonomicNameLabel>
Note the tendency of decreasing angle of expansion with diameter. The adult diameter is reached at ca. 15 mm.
</paragraph>
</caption>
<paragraph id="255B2142CD536A51F2DD4621FBB7FDA0" blockId="55.[189,1398,267,541]" pageId="55" pageNumber="56">
conch is ornamented with fine raised longitudinal lirae, which have a distance of ca.
<quantity id="E21C8CA7CD536A51F6C64621FAA1FE9B" box="[1190,1284,267,294]" metricMagnitude="-4" metricUnit="m" metricValue="2.0" pageId="55" pageNumber="56" unit="mm" value="0.2">0.2 mm</quantity>
, and with transverse lirae, which have a distance of
<quantity id="E21C8CA7CD536A51F0CD4605FCAEFEF4" box="[685,779,303,329]" metricMagnitude="-4" metricUnit="m" metricValue="1.0" pageId="55" pageNumber="56" unit="mm" value="0.1">0.1 mm</quantity>
. The spacing of both the longitudinal and transverse lirae is slightly variable. Additionally, the surface of the shell undulates slightly, with a varying distance of ca.
<quantity id="E21C8CA7CD536A51F365465FFEE9FE32" box="[261,332,373,399]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="55" pageNumber="56" unit="mm" value="2.0">2 mm</quantity>
. The transverse ornamentation forms a very shallow sinus on the concave side of the conch curvature. The conch is very slightly curved with the siphuncle eccentric to subcentral in position. It shifts slightly to the convex side of the conch curvature during the growth of the organism. At the apical end of the fragment, the smallest distance of the siphuncle from the conch margin is
<quantity id="E21C8CA7CD536A51F6F546F5FB4BFE44" box="[1173,1262,479,505]" metricMagnitude="-3" metricUnit="m" metricValue="2.7" pageId="55" pageNumber="56" unit="mm" value="2.7">2.7 mm</quantity>
(SPR 0.46) and the chamber height is
<quantity id="E21C8CA7CD536A51F3924528FD93FDA1" box="[498,566,514,540]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="55" pageNumber="56" unit="mm" value="3.0">3 mm</quantity>
(ca. 0.5 of corresponding conch height).
</paragraph>
<paragraph id="255B2142CD536A51F2DD4569FDE5FC8D" blockId="55.[189,1399,579,817]" pageId="55" pageNumber="56">
The details of the siphuncle and septal necks are seen in PMU 26784, a portion of phragmocone, increasing in diameter from ca.
<quantity id="E21C8CA7CD536A51F05D454CFD4DFD3C" box="[573,744,614,641]" metricMagnitude="-3" metricUnit="m" metricValue="7.75" metricValueMax="8.7" metricValueMin="6.8" pageId="55" pageNumber="56" unit="mm" value="7.75" valueMax="8.7" valueMin="6.8">6.8 to 8.7 mm</quantity>
(
<figureCitation id="BDDF3DC7CD536A51F09A454CFCC9FD3D" box="[762,876,614,640]" 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 &amp; 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="55" pageNumber="56">Figs 13D</figureCitation>
,
<figureCitation id="BDDF3DC7CD536A51F11B454CFC15FD3D" box="[891,944,614,640]" captionStart="Fig" captionStartId="27.[189,232,1827,1853]" captionTargetBox="[200,1393,1425,1772]" captionTargetId="graphics@27.[350,920,1435,1742]" captionTargetPageId="27" captionText="Fig. 14. Reconstructions of the details of the septal necks and siphuncular segments of Orthocerida of the Boda Limestone. Note the different septal thicknesses. A. Striatocycloceras isbergi sp. nov., PMU 26681, Kallholn. B. Dawsonoceras fenestratum (Eichwald, 1860), PMU 26706, Kallholn. C. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo 150102c, Osmundsberget. D. Isorthoceras angelini sp. nov., PMU 26784, Kallholn." figureDoi="http://doi.org/10.5281/zenodo.3814253" httpUri="https://zenodo.org/record/3814253/files/figure.png" pageId="55" pageNumber="56">14C</figureCitation>
). At the adapical end of the specimen the siphuncle is
<quantity id="E21C8CA7CD536A51F31F45A0FE7FFD19" box="[383,474,650,676]" metricMagnitude="-3" metricUnit="m" metricValue="1.9" pageId="55" pageNumber="56" unit="mm" value="1.9">1.9 mm</quantity>
from the conch margin (SPR 0.28) and the distance between septa is
<quantity id="E21C8CA7CD536A51F77B45A0FAD2FD19" box="[1307,1399,650,676]" metricMagnitude="-3" metricUnit="m" metricValue="2.9" pageId="55" pageNumber="56" unit="mm" value="2.9">2.9 mm</quantity>
(0.43 of corresponding conch cross section). The siphuncle is nearly tubular, with very slightly inflated connecting rings. It has a diameter of 0.15 of the corresponding conch cross section. The septal necks are very short, poorly preserved, and appear to be suborthochoanitic or cyrtochoanitic. Episeptal and mural deposits occur (
<figureCitation id="BDDF3DC7CD536A51F3A1443CFD97FC8D" box="[449,562,790,816]" 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 &amp; 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="55" pageNumber="56">Figs 13D</figureCitation>
).
</paragraph>
<paragraph id="255B2142CD536A51F2DD4472FD14FC61" blockId="55.[189,1399,856,988]" pageId="55" pageNumber="56">
The nine available measurements of angles of expansion reveal a clear tendency of decreasing angle of expansion with increasing conch size. The maximum values are reached by the fragment of the
<typeStatus id="FA5F9FE0CD536A51F2DD44B4FE89FC05" box="[189,300,926,952]" pageId="55" pageNumber="56" type="lectotype">lectotype</typeStatus>
, the average is 7.1° and the smallest measurements are on the specimen with a maximum diameter of
<quantity id="E21C8CA7CD536A51F32B44EBFE38FC61" box="[331,413,961,988]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="55" pageNumber="56" unit="mm" value="15.0">15 mm</quantity>
(PMU 26786,
<figureCitation id="BDDF3DC7CD536A51F02D44EBFD01FC61" box="[589,676,961,988]" captionStart="Fig" captionStartId="54.[189,232,1909,1935]" captionTargetBox="[309,1298,1084,1851]" captionTargetId="graphics@54.[427,1298,1084,1717]" captionTargetPageId="54" captionText="Fig. 25. Variability of the angle of expansion in fragments of different diameters of Isorthoceras angelini sp. nov. Note the tendency of decreasing angle of expansion with diameter. The adult diameter is reached at ca. 15 mm." figureDoi="http://doi.org/10.5281/zenodo.3814275" httpUri="https://zenodo.org/record/3814275/files/figure.png" pageId="55" pageNumber="56">Fig. 25</figureCitation>
).
</paragraph>
<paragraph id="255B2142CD536A51F2DD4329FAC2FBD9" blockId="55.[189,1399,1027,1124]" pageId="55" pageNumber="56">PMU 26785 and 26786 are the largest fragments, both consisting of parts of body chambers that are nearly tubular. The ornamentation of these fragments is characterized by longitudinal and transverse lirae and a very shallow, irregular undulation. Pronounced, irregularly spaced growth lines also occur.</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD536A51F2DD43A0FD36F8FE" pageId="55" pageNumber="56" type="discussion">
<paragraph id="255B2142CD536A51F2DD43A0FEFDFB19" blockId="55.[189,344,1162,1188]" box="[189,344,1162,1188]" pageId="55" pageNumber="56">
<heading id="7E13962ECD536A51F2DD43A0FEFDFB19" bold="true" box="[189,344,1162,1188]" fontSize="11" level="3" pageId="55" pageNumber="56" reason="3">
<emphasis id="1790FD50CD536A51F2DD43A0FEFDFB19" bold="true" box="[189,344,1162,1188]" pageId="55" pageNumber="56">Comparison</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD536A51F2DD4393FBD4FB4B" blockId="55.[189,1398,1209,1271]" pageId="55" pageNumber="56">
This species of
<taxonomicName id="E2E45AC1CD536A51F3134393FDA2FB6E" authorityName="Flower" authorityYear="1962" box="[371,519,1209,1235]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD536A51F3134393FDA2FB6E" box="[371,519,1209,1235]" italics="true" pageId="55" pageNumber="56">Isorthoceras</emphasis>
</taxonomicName>
is unique because of its combination of a relatively small adult size of only
<quantity id="E21C8CA7CD536A51F2DD43F6FEB6FB4A" box="[189,275,1244,1271]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="55" pageNumber="56" unit="mm" value="15.0">15 mm</quantity>
, its angle of expansion of 7–9° and its eccentrically positioned siphuncle.
</paragraph>
<paragraph id="255B2142CD536A51F2DD4234FECBFAC3" blockId="55.[189,1398,1310,1406]" pageId="55" pageNumber="56">
A very similar, yet undescribed species occurs in the Kullsberg Limestone, early-mid Katian of
<collectingRegion id="E720EFA0CD536A51F2DD426BFEB8FAE6" box="[189,285,1345,1371]" country="Sweden" name="Dalarna" pageId="55" pageNumber="56">Dalarna</collectingRegion>
,
<collectingCountry id="5DF361D2CD536A51F348426BFE2CFAE6" box="[296,393,1345,1371]" name="Sweden" pageId="55" pageNumber="56">Sweden</collectingCountry>
. This species differs from
<taxonomicName id="E2E45AC1CD536A51F0DF4268FC92FAE6" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[703,823,1345,1371]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD536A51F0DF4268FC92FAE6" box="[703,823,1345,1371]" italics="true" pageId="55" pageNumber="56">I. angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD536A51F15F4268FC3CFAE1" box="[831,921,1346,1372]" pageId="55" pageNumber="56" rank="species">sp. nov.</taxonomicNameLabel>
in having a more pronounced transverse ornamentation.
</paragraph>
<paragraph id="255B2142CD536A51F2DD428CFD36F8FE" blockId="55.[189,1399,1446,1860]" pageId="55" pageNumber="56">
A reticulate ornamentation occurs also in
<taxonomicName id="E2E45AC1CD536A51F0D6428CFF5FFA5E" authority="Angelin in Angelin &amp; Lindstrom, 1880" authorityName="Angelin in Angelin &amp; Lindstrom" authorityYear="1880" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="55" pageNumber="56" phylum="Tracheophyta" rank="species" species="lepteanarum">
<emphasis id="1790FD50CD536A51F0D6428CFC7CFA7D" box="[694,985,1446,1472]" italics="true" pageId="55" pageNumber="56">Orthoceras lepteanarum</emphasis>
Angelin
<emphasis id="1790FD50CD536A51F62C428DFBC6FA7D" box="[1100,1123,1447,1472]" italics="true" pageId="55" pageNumber="56">in</emphasis>
<bibRefCitation id="41755CB3CD536A51F60B428CFF5FFA5E" author="Angelin N. P. &amp; Lindstrom G." pageId="55" pageNumber="56" refId="ref46414" refString="Angelin N. P. &amp; Lindstrom G. 1880. Fragmenta Silurica. Samson and Wallin, Stockholm." type="book" year="1880">Angelin &amp; Lindström, 1880</bibRefCitation>
</taxonomicName>
, a species which is known from a single specimen (NRM Mo 152344) from the Boda Limestone of Ostbjörka. This specimen is a poorly preserved small fragment of a phragmocone with a diameter of
<quantity id="E21C8CA7CD536A51F2DD4125FEB6F997" box="[189,275,1551,1578]" metricMagnitude="-2" metricUnit="m" metricValue="3.8" pageId="55" pageNumber="56" unit="mm" value="38.0">38 mm</quantity>
. It is very likely to represent a species of
<taxonomicName id="E2E45AC1CD536A51F0984125FC29F994" authorityName="Flower" authorityYear="1962" box="[760,908,1551,1577]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="genus">
<emphasis id="1790FD50CD536A51F0984125FC29F994" box="[760,908,1551,1577]" italics="true" pageId="55" pageNumber="56">Isorthoceras</emphasis>
</taxonomicName>
and may be closely related or conspecific with
<taxonomicName id="E2E45AC1CD536A51F2984118FD12F9F0" authority="(Hall, 1847)" baseAuthorityName="Hall" baseAuthorityYear="1847" box="[248,695,1586,1613]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="tenuitextum">
<emphasis id="1790FD50CD536A51F2984118FDB8F9F1" box="[248,541,1586,1612]" italics="true" pageId="55" pageNumber="56">Isorthoceras tenuitextum</emphasis>
(
<bibRefCitation id="41755CB3CD536A51F04C4118FD0BF9F0" author="Hall J." box="[556,686,1586,1613]" pageId="55" pageNumber="56" 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>
)
</taxonomicName>
. The ornamentation in NRM Mo 152344 is partly preserved and consists of elevated, irregularly spaced, longitudinal and transverse lirae. The distance between the longitudinal striae (ca.
<quantity id="E21C8CA7CD536A51F3AA4153FD80F92E" box="[458,549,1657,1684]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="55" pageNumber="56" unit="mm" value="1.5">1.5 mm</quantity>
) is considerably larger than that of the transverse elements, resulting in a surface pattern of minute transverse rectangles. Compared with
<taxonomicName id="E2E45AC1CD536A51F1FA41B7FBB4F90B" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[922,1041,1692,1719]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD536A51F1FA41B7FC01F90B" box="[922,932,1693,1718]" italics="true" pageId="55" pageNumber="56">I</emphasis>
.
<emphasis id="1790FD50CD536A51F1D141B6FBB4F90B" box="[945,1041,1692,1718]" italics="true" pageId="55" pageNumber="56">angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD536A51F67641B7FBD4F90A" box="[1046,1137,1693,1719]" pageId="55" pageNumber="56" rank="species">sp. nov.</taxonomicNameLabel>
, the longitudinal striae are significantly more widely spaced, both in absolute dimensions (more than
<quantity id="E21C8CA7CD536A51F6344195FB3DF967" box="[1108,1176,1727,1754]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="55" pageNumber="56" unit="mm" value="1.0">1 mm</quantity>
in
<taxonomicName id="E2E45AC1CD536A51F6DE41EAFAD3F964" authorityName="Angelin in Angelin &amp; Lindstrom" authorityYear="1880" box="[1214,1398,1727,1754]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="55" pageNumber="56" phylum="Tracheophyta" rank="species" species="lepteanarum">
<emphasis id="1790FD50CD536A51F6DE41EAFB76F967" box="[1214,1235,1728,1754]" italics="true" pageId="55" pageNumber="56">O</emphasis>
.
<emphasis id="1790FD50CD536A51F6824195FAD3F964" box="[1250,1398,1727,1753]" italics="true" pageId="55" pageNumber="56">lepteanarum</emphasis>
</taxonomicName>
against ca.
<quantity id="E21C8CA7CD536A51F32241C9FE75F940" box="[322,464,1763,1789]" metricMagnitude="-4" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" pageId="55" pageNumber="56" unit="mm" value="0.15" valueMax="0.2" valueMin="0.1">0.1–0.2 mm</quantity>
in
<taxonomicName id="E2E45AC1CD536A51F39641C9FDD5F941" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[502,624,1762,1788]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD536A51F39641C9FDD5F941" box="[502,624,1762,1788]" italics="true" pageId="55" pageNumber="56">I. angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD536A51F01841C9FD71F940" box="[632,724,1763,1789]" pageId="55" pageNumber="56" rank="species">sp. nov.</taxonomicNameLabel>
) and in relative dimensions (more than 5 transverse lirae occur per distance similar to the distance of two longitudinal striae in
<emphasis id="1790FD50CD536A51F66E402DFBBDF89D" box="[1038,1048,1799,1824]" italics="true" pageId="55" pageNumber="56">I</emphasis>
. (?)
<taxonomicName id="E2E45AC1CD536A51F633402CFB42F89D" authorityName="Kröger" authorityYear="2013" box="[1107,1255,1798,1824]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="55" pageNumber="56" phylum="Tracheophyta" rank="species" species="lepteanarum" status="comb. nov.">
<emphasis id="1790FD50CD536A51F633402CFB42F89D" box="[1107,1255,1798,1824]" italics="true" pageId="55" pageNumber="56">lepteanarum</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD536A51F691402CFAD3F89D" box="[1265,1398,1798,1824]" pageId="55" pageNumber="56" rank="species">comb. nov.</taxonomicNameLabel>
against ca.
<quantity id="E21C8CA7CD536A51F3204003FE05F8FE" box="[320,416,1833,1860]" metricMagnitude="-2" metricUnit="m" metricValue="4.445" metricValueMax="5.08" metricValueMin="3.81" pageId="55" pageNumber="56" unit="in" value="1.75" valueMax="2.0" valueMin="1.5">1.5–2 in</quantity>
<taxonomicName id="E2E45AC1CD536A51F3C84000FD85F8FE" authority="Kröger, 2013" authorityName="Kröger" authorityYear="2013" box="[424,544,1833,1859]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="angelini" status="sp. nov.">
<emphasis id="1790FD50CD536A51F3C84000FD85F8FE" box="[424,544,1833,1859]" italics="true" pageId="55" pageNumber="56">I. angelini</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0CA3402BCD536A51F0474003FD23F8FE" box="[551,646,1833,1859]" pageId="55" pageNumber="56" rank="species">sp. nov.</taxonomicNameLabel>
).
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD536A5EF2DD4040FDF9FED1" lastPageId="56" lastPageNumber="57" pageId="55" pageNumber="56" type="reference_group">
<paragraph id="255B2142CD536A51F2DD4040FC6BF876" blockId="55.[189,1398,1898,1995]" pageId="55" pageNumber="56">
<taxonomicName id="E2E45AC1CD536A51F2DD4040FDDEF839" authority="(Hall, 1847)" baseAuthorityName="Hall" baseAuthorityYear="1847" box="[189,635,1898,1924]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="55" pageNumber="56" phylum="Mollusca" rank="species" species="tenuitextum">
<emphasis id="1790FD50CD536A51F2DD4040FE47F839" box="[189,482,1898,1924]" italics="true" pageId="55" pageNumber="56">Isorthoceras tenuitextum</emphasis>
(
<bibRefCitation id="41755CB3CD536A51F3914040FDD4F839" author="Hall J." box="[497,625,1898,1924]" pageId="55" pageNumber="56" 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>
)
</taxonomicName>
, which is common in late Katian sediments of Eastern Laurentia, is similar in ornamentation, but differs in having an adult size of more than
<quantity id="E21C8CA7CD536A51F65340A7FB23F815" box="[1075,1158,1933,1960]" metricMagnitude="-2" metricUnit="m" metricValue="2.5" pageId="55" pageNumber="56" unit="mm" value="25.0">25 mm</quantity>
and a less, but more consistently expanding conch with an angle of expansion of ca. 6°.
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD4621FDF9FED1" blockId="56.[189,1399,267,364]" pageId="56" pageNumber="57">
<taxonomicName id="E2E45AC1CD5C6A5EF2DD4621FD6CFE98" authority="(Miller &amp; Faber, 1894)" baseAuthorityName="Miller &amp; Faber" baseAuthorityYear="1894" box="[189,713,267,293]" class="Cephalopoda" family="Proteoceratidae" genus="Isorthoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="56" pageNumber="57" phylum="Mollusca" rank="species" species="albersi">
<emphasis id="1790FD50CD5C6A5EF2DD4621FE0EFE98" box="[189,427,267,293]" italics="true" pageId="56" pageNumber="57">Isorthoceras albersi</emphasis>
(Miller &amp; Faber, 1894)
</taxonomicName>
, which is the most common species within the Lexington Limestone,
<collectingRegion id="E720EFA0CD5C6A5EF3264604FE1CFEF5" box="[326,441,302,328]" country="United States of America" name="Kentucky" pageId="56" pageNumber="57">Kentucky</collectingRegion>
,
<collectingCountry id="5DF361D2CD5C6A5EF3A44605FE58FEF4" box="[452,509,303,329]" name="United States of America" pageId="56" pageNumber="57">USA</collectingCountry>
(see
<bibRefCitation id="41755CB3CD5C6A5EF0584605FD7BFEF4" author="Frey R. C." box="[568,734,302,329]" pageId="56" pageNumber="57" pagination="1 - 119" refId="ref47726" refString="Frey R. C. 1995. Middle and Upper Ordovician Cephalopods of the Cincinnati Region of Kentucky, Indiana, and Ohio. United States Geological Survey Professional Paper 1066 P: 1 - 119." type="book chapter" year="1995">Frey 1995: 60</bibRefCitation>
), has a similar ornamentation and angle of expansion, but differs in having a larger adult size.
</paragraph>
</subSubSection>
<subSubSection id="6DFE72C9CD5C6A5EF2DD46B9FD4EFE61" pageId="56" pageNumber="57" type="multiple">
<paragraph id="255B2142CD5C6A5EF2DD46B9FDD8FE10" blockId="56.[189,637,403,429]" box="[189,637,403,429]" pageId="56" pageNumber="57">
<heading id="7E13962ECD5C6A5EF2DD46B9FDD8FE10" bold="true" box="[189,637,403,429]" fontSize="11" level="3" pageId="56" pageNumber="57" reason="3">
<emphasis id="1790FD50CD5C6A5EF2DD46B9FDD8FE10" bold="true" box="[189,637,403,429]" pageId="56" pageNumber="57">Stratigraphic and geographic range</emphasis>
</heading>
</paragraph>
<paragraph id="255B2142CD5C6A5EF2DD46E8FD4EFE61" blockId="56.[189,747,450,476]" box="[189,747,450,476]" pageId="56" pageNumber="57">
Boda Limestone, late Katian,
<collectingRegion id="E720EFA0CD5C6A5EF07B46E8FDDEFE61" box="[539,635,450,476]" country="Sweden" name="Dalarna" pageId="56" pageNumber="57">Dalarna</collectingRegion>
,
<collectingCountry id="5DF361D2CD5C6A5EF0E746E8FD4DFE61" box="[647,744,450,476]" name="Sweden" pageId="56" pageNumber="57">Sweden</collectingCountry>
.
</paragraph>
</subSubSection>
</treatment>
</document>
Reference in a new issue View git blame Copy permalink