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<document ID-DOI="http://dx.doi.org/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" checkinTime="1588881240389" checkinUser="carolina" docAuthor="Kröger, Björn" docDate="2013" docId="AD4D9054CD476A42F06D432DFC63F873" docLanguage="en" docName="ejt-2013-41.pdf.imf" docOrigin="European Journal of Taxonomy 41" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.12:EJT.2018-.journal_article" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article" docStyleVersion="12" docTitle="Palaeodawsonocerina Kroger &amp; Isakar 2006" docType="treatment" docVersion="6" lastPageNumber="37" masterDocId="5174E82CCD646A66F260472AFFA5FFBD" masterDocTitle="The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden" masterLastPageNumber="110" masterPageNumber="1" pageNumber="36" updateTime="1634716833028" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-3.0" zenodo-license-figures="CC-BY-3.0" zenodo-license-treatments="UNSPECIFIED">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Kröger, Björn</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>European Journal of Taxonomy</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2013</mods:date>
<mods:detail type="pubDate">
<mods:number>2013-03-27</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>41</mods:number>
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<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>110</mods:end>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.5852/ejt.2013.41</mods:identifier>
<mods:identifier type="GBIF-Dataset">386010a0-6da4-4fa3-9d1a-4b3b5427cac5</mods:identifier>
<mods:identifier type="ISSN">2118-9773</mods:identifier>
<mods:identifier type="Zenodo-Dep">3814221</mods:identifier>
<mods:identifier type="ZooBank">A2F1B9ED-870A-466E-B35E-BD5DA782476E</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.3815098" ID-GBIF-Taxon="163977247" ID-Zenodo-Dep="3815098" LSID="urn:lsid:plazi:treatment:AD4D9054CD476A42F06D432DFC63F873" httpUri="http://treatment.plazi.org/id/AD4D9054CD476A42F06D432DFC63F873" lastPageId="36" lastPageNumber="37" pageId="35" pageNumber="36">
<subSubSection box="[525,1062,1031,1058]" pageId="35" pageNumber="36" type="nomenclature">
<paragraph blockId="35.[366,1221,1031,1128]" box="[525,1062,1031,1058]" pageId="35" pageNumber="36">
<heading box="[525,1062,1031,1058]" centered="true" fontSize="11" level="2" pageId="35" pageNumber="36" reason="2">
<emphasis bold="true" box="[525,965,1031,1058]" pageId="35" pageNumber="36">
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[525,791,1031,1058]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="35" pageNumber="36" phylum="Mollusca" rank="genus">
<emphasis bold="true" box="[525,791,1031,1058]" italics="true" pageId="35" pageNumber="36">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis bold="true" box="[813,965,1031,1058]" italics="true" pageId="35" pageNumber="36">nicolletoides</emphasis>
</emphasis>
sp. nov.
</heading>
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="description">
<paragraph blockId="35.[366,1221,1031,1128]" box="[366,1221,1067,1094]" pageId="35" pageNumber="36">
<uri box="[366,1221,1067,1094]" pageId="35" pageNumber="36">
urn:lsid:zoobank.org:act:
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</uri>
</paragraph>
<paragraph blockId="35.[366,1221,1031,1128]" box="[694,894,1102,1128]" pageId="35" pageNumber="36">
<figureCitation box="[694,780,1102,1128]" captionStart="Fig" captionStartId="25.[189,232,1894,1920]" captionTargetBox="[201,1384,752,1851]" captionTargetId="figure@25.[189,1400,752,1852]" captionTargetPageId="25" captionText="Fig. 12. Annelate Orthocerida of the Boda Limestone. A. Palaeodawsonocerina senckenbergi (Teichert, 1930), PMU 26718, Kallholn. B-C. Striatocycloceras isbergi sp. nov., Osmundsberget. B. PMU 26660, holotype, Osmundberget. C. PMU 26664. D-E. Palaeodawsonocerina? nicolletoides sp. nov., PMU 26728, Kallholn. D. Adapical view. E. Lateral view. Scale A-C = 10 mm; D-E = 10 mm." figureDoi="http://doi.org/10.5281/zenodo.3814249" httpUri="https://zenodo.org/record/3814249/files/figure.png" pageId="35" pageNumber="36">Figs 12</figureCitation>
D-E, 18B
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="diagnosis">
<paragraph blockId="35.[189,310,1167,1193]" box="[189,310,1167,1193]" pageId="35" pageNumber="36">
<heading bold="true" box="[189,310,1167,1193]" fontSize="11" level="3" pageId="35" pageNumber="36" reason="3">
<emphasis bold="true" box="[189,310,1167,1193]" pageId="35" pageNumber="36">Diagnosis</emphasis>
</heading>
</paragraph>
<paragraph blockId="35.[189,1398,1214,1416]" pageId="35" pageNumber="36">
Slender, large cyrtocones with a slightly compressed conch cross section and a pronounced annulation; prosiphuncular conch margin wider and more flattened than antisiphuncular margin in cross section; adult conch diameter ca.
<quantity box="[495,584,1284,1311]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="35" pageNumber="36" unit="mm" value="30.0">30 mm</quantity>
; annuli relatively wide, ca. 4 per distance equal to conch diameter, ridges of annuli sharp and narrow, grooves wider and more rounded; conch surface ornamented with fine longitudinal striae and faint, very shallow, rounded longitudinal ridges; siphuncle eccentric, lying on concave side of conch curvature, septal perforation ca. 0.14 of conch cross section.
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="etymology">
<paragraph blockId="35.[189,324,1456,1482]" box="[189,324,1456,1482]" pageId="35" pageNumber="36">
<heading bold="true" box="[189,324,1456,1482]" fontSize="11" level="3" pageId="35" pageNumber="36" reason="3">
<emphasis bold="true" box="[189,324,1456,1482]" pageId="35" pageNumber="36">Etymology</emphasis>
</heading>
</paragraph>
<paragraph blockId="35.[189,1398,1502,1599]" pageId="35" pageNumber="36">
The name refers to
<taxonomicName authority="Clarke, 1897" authorityName="Clarke" authorityYear="1897" box="[420,821,1502,1528]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="35" pageNumber="36" phylum="Tracheophyta" rank="species" species="nicolleti">
<emphasis box="[420,554,1502,1528]" italics="true" pageId="35" pageNumber="36">Orthoceras</emphasis>
<emphasis box="[562,658,1502,1528]" italics="true" pageId="35" pageNumber="36">nicolleti</emphasis>
Clarke, 1897
</taxonomicName>
, which is very similar to
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[1123,1385,1502,1528]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="35" pageNumber="36" phylum="Mollusca" rank="genus">
<emphasis box="[1123,1385,1502,1528]" italics="true" pageId="35" pageNumber="36">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis box="[189,339,1537,1563]" italics="true" pageId="35" pageNumber="36">nicolletoides</emphasis>
sp. nov. However, this species differs from
<taxonomicName box="[846,976,1537,1564]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="35" pageNumber="36" phylum="Tracheophyta" rank="species" species="nicoletti">
<emphasis box="[846,976,1537,1564]" italics="true" pageId="35" pageNumber="36">O. nicoletti</emphasis>
</taxonomicName>
in having a less centrally positioned siphuncle and a more circular conch cross section.
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="materials_examined">
<paragraph blockId="35.[189,364,1638,1664]" box="[189,364,1638,1664]" pageId="35" pageNumber="36">
<heading bold="true" box="[189,364,1638,1664]" fontSize="11" level="3" pageId="35" pageNumber="36" reason="3">
<emphasis bold="true" box="[189,364,1638,1664]" pageId="35" pageNumber="36">Type material</emphasis>
</heading>
</paragraph>
<materialsCitation ID-GBIF-Occurrence="2610779306" collectionCode="PMU" pageId="35" pageNumber="36" specimenCode="PMU 26727" specimenCount="1" typeStatus="holotype">
<paragraph blockId="35.[189,1398,1684,1852]" box="[234,348,1684,1710]" pageId="35" pageNumber="36">
<emphasis bold="true" box="[234,348,1684,1710]" pageId="35" pageNumber="36">
<typeStatus box="[234,348,1684,1710]" pageId="35" pageNumber="36">Holotype</typeStatus>
</emphasis>
</paragraph>
<paragraph blockId="35.[189,1398,1684,1852]" box="[189,341,1719,1746]" pageId="35" pageNumber="36">
<accessionNumber box="[189,337,1719,1746]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26727" pageId="35" pageNumber="36">
<specimenCode box="[189,337,1719,1746]" pageId="35" pageNumber="36">PMU 26727</specimenCode>
</accessionNumber>
.
</paragraph>
</materialsCitation>
<paragraph blockId="35.[189,1398,1684,1852]" box="[234,348,1755,1781]" pageId="35" pageNumber="36">
<emphasis bold="true" box="[234,348,1755,1781]" pageId="35" pageNumber="36">
<typeStatus box="[234,348,1755,1781]" pageId="35" pageNumber="36">Paratype</typeStatus>
</emphasis>
</paragraph>
<paragraph blockId="35.[189,1398,1684,1852]" pageId="35" pageNumber="36">
One
<typeStatus box="[243,349,1790,1816]" pageId="35" pageNumber="36">paratype</typeStatus>
:
<accessionNumber box="[357,499,1790,1816]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26728" pageId="35" pageNumber="36">
<collectionCode box="[357,421,1790,1816]" country="Sweden" httpUri="http://grbio.org/cool/32ji-dbbk" name="Paleontological Museum of Uppsala" pageId="35" pageNumber="36">PMU</collectionCode>
26728
</accessionNumber>
from Kallholn, Siljan District,
<collectingCountry box="[855,952,1790,1816]" name="Sweden" pageId="35" pageNumber="36">Sweden</collectingCountry>
; Boda Limestone, Boda Core Member, late Katian, Late Ordovician.
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="distribution">
<paragraph blockId="35.[189,507,1890,1917]" box="[189,507,1890,1917]" pageId="35" pageNumber="36">
<heading bold="true" box="[189,507,1890,1917]" fontSize="11" level="3" pageId="35" pageNumber="36" reason="3">
<emphasis bold="true" box="[189,507,1890,1917]" pageId="35" pageNumber="36">Type locality and horizon</emphasis>
</heading>
</paragraph>
<paragraph blockId="35.[189,1329,1937,1963]" box="[189,1329,1937,1963]" pageId="35" pageNumber="36">
Kallholn, Siljan District,
<collectingCountry box="[485,581,1937,1963]" name="Sweden" pageId="35" pageNumber="36">Sweden</collectingCountry>
, Boda Limestone, Boda Core Member, late Katian, Ordovician.
</paragraph>
</subSubSection>
<subSubSection pageId="36" pageNumber="37" type="description">
<paragraph blockId="36.[189,334,267,293]" box="[189,334,267,293]" pageId="36" pageNumber="37">
<heading bold="true" box="[189,334,267,293]" fontSize="11" level="3" pageId="36" pageNumber="37" reason="3">
<emphasis bold="true" box="[189,334,267,293]" pageId="36" pageNumber="37">Description</emphasis>
</heading>
</paragraph>
<paragraph blockId="36.[189,1399,313,586]" pageId="36" pageNumber="37">
Specimen
<accessionNumber box="[315,461,313,340]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26728" pageId="36" pageNumber="37">PMU 26728</accessionNumber>
is a
<quantity box="[524,624,313,340]" metricMagnitude="-1" metricUnit="m" metricValue="1.05" pageId="36" pageNumber="37" unit="mm" value="105.0">105 mm</quantity>
long fragment of a nearly complete curved body chamber, with a diameter that increases from
<quantity box="[569,730,349,375]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" metricValueMax="3.2" metricValueMin="2.8" pageId="36" pageNumber="37" unit="mm" value="30.0" valueMax="32.0" valueMin="28.0">28 to 32 mm</quantity>
(angle of expansion 2°;
<figureCitation box="[1037,1123,348,375]" captionStart="Fig" captionStartId="25.[189,232,1894,1920]" captionTargetBox="[201,1384,752,1851]" captionTargetId="figure@25.[189,1400,752,1852]" captionTargetPageId="25" captionText="Fig. 12. Annelate Orthocerida of the Boda Limestone. A. Palaeodawsonocerina senckenbergi (Teichert, 1930), PMU 26718, Kallholn. B-C. Striatocycloceras isbergi sp. nov., Osmundsberget. B. PMU 26660, holotype, Osmundberget. C. PMU 26664. D-E. Palaeodawsonocerina? nicolletoides sp. nov., PMU 26728, Kallholn. D. Adapical view. E. Lateral view. Scale A-C = 10 mm; D-E = 10 mm." figureDoi="http://doi.org/10.5281/zenodo.3814249" httpUri="https://zenodo.org/record/3814249/files/figure.png" pageId="36" pageNumber="37">Fig. 12</figureCitation>
D-E). The conch cross section is nearly circular at the base of the body chamber and slightly compressed at the aperture. The shell is strongly annulate, with a distance between annuli that increases adorally from
<quantity box="[1225,1295,420,446]" metricMagnitude="-3" metricUnit="m" metricValue="7.0" pageId="36" pageNumber="37" unit="mm" value="7.0">7 mm</quantity>
(0.24 of corresponding conch diameter) to
<quantity box="[589,671,454,481]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="36" pageNumber="37" unit="mm" value="10.0">10 mm</quantity>
(0.31 of corresponding conch cross section). The second most adoral of the ridges is significantly lower in amplitude. Generally the ridges of the annuli are sharper than the valleys, which are broadly rounded. The annuli are slightly oblique, inclined adorally on the concave side of the conch curvature.
</paragraph>
<paragraph blockId="36.[189,1399,625,898]" pageId="36" pageNumber="37">
The
<typeStatus box="[243,346,625,651]" pageId="36" pageNumber="37">holotype</typeStatus>
(
<accessionNumber box="[362,514,625,652]" httpUri="http://www.ncbi.nlm.nih.gov/protein/PMU26727" pageId="36" pageNumber="37">PMU 26727</accessionNumber>
), is a small piece of phragmocone
<quantity box="[929,1013,625,652]" metricMagnitude="-2" metricUnit="m" metricValue="2.8" pageId="36" pageNumber="37" unit="mm" value="28.0">28 mm</quantity>
in diameter. The only preserved septum of this specimen is shallow convex (height of curvature
<quantity box="[962,1035,660,687]" metricMagnitude="-3" metricUnit="m" metricValue="6.0" pageId="36" pageNumber="37" unit="mm" value="6.0">6 mm</quantity>
, 0.21 of conch diameter). The conch cross section is not perfectly circular, but rounded triangular with a pointed antisiphuncular and a broad prosiphuncular side. The septal perforation is
<quantity box="[833,902,731,757]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="36" pageNumber="37" unit="mm" value="4.0">4 mm</quantity>
wide and eccentrically positioned, with a distance of
<quantity box="[325,409,766,793]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="36" pageNumber="37" unit="mm" value="10.0">10 mm</quantity>
from the conch margin (SPR 0.36) on the concave side of the conch curvature. The shell is thin,
<quantity box="[341,431,801,828]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="36" pageNumber="37" unit="mm" value="0.5">0.5 mm</quantity>
in the grooves of the annulation and thickens toward the ridges. The shell surface is ornamented with very fine longitudinal striae (ca. 10 per one millimeter), and very shallow, rounded, inconspicuous longitudinal ridges (
<figureCitation box="[601,708,872,898]" captionStart="Fig" captionStartId="34.[189,232,1688,1714]" captionTargetBox="[189,1400,265,1645]" captionTargetId="figure@34.[189,1400,265,1646]" captionTargetPageId="34" captionText="Fig. 18. Shell ornamentation of selected Cephalopoda of the Boda Formation. A. Order, gen. et sp. indet., PMU 26950, Kallholn, lateral view. B. Palaeodawsonocerina? nicolletoides sp. nov., PMU 26727, holotype, Kallholn. C. Palaeodawsonocerina senckenbergi (Teichert, 1930), PMU 26718, Kallholn. D. Geisonoceras wegelini (Angelin in Angelin &amp; Lindström, 1880) comb. nov., PMU 26745, Unskarsheden. E. Pleurorthoceras osmundsbergense sp. nov., NRM-PZ Mo 150126, holotype, Osmundsberget. F. Warburgoceras longitudinale (Angelin in Angelin &amp; Lindström, 1880) comb. nov., NRM-PZ Mo 154065, Unskarsheden. G. Redpathoceras depressum sp. nov., PMU 26931, Kallholn. Scale bar = 5 mm for all figures." figureDoi="http://doi.org/10.5281/zenodo.3814261" httpUri="https://zenodo.org/record/3814261/files/figure.png" pageId="36" pageNumber="37">Fig. 18B</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection pageId="36" pageNumber="37" type="discussion">
<paragraph blockId="36.[189,303,937,963]" box="[189,303,937,963]" pageId="36" pageNumber="37">
<heading bold="true" box="[189,303,937,963]" fontSize="11" level="3" pageId="36" pageNumber="37" reason="3">
<emphasis bold="true" box="[189,303,937,963]" pageId="36" pageNumber="37">Remarks</emphasis>
</heading>
</paragraph>
<paragraph blockId="36.[189,1399,984,1116]" pageId="36" pageNumber="37">
The generic assignment of this species is uncertain because only fragments of the mature body chamber are known and internal details are a matter of speculation. However, because the conspicuous ornamentation is characteristic of other species of
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[795,1057,1054,1080]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[795,1057,1054,1080]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
, the species is provisionally assigned to that genus.
</paragraph>
<paragraph blockId="36.[189,344,1154,1180]" box="[189,344,1154,1180]" pageId="36" pageNumber="37">
<heading bold="true" box="[189,344,1154,1180]" fontSize="11" level="3" pageId="36" pageNumber="37" reason="3">
<emphasis bold="true" box="[189,344,1154,1180]" pageId="36" pageNumber="37">Comparison</emphasis>
</heading>
</paragraph>
<paragraph blockId="36.[189,1399,1201,1369]" pageId="36" pageNumber="37">
The specimens described above are nearly identical to
<taxonomicName authorityName="Clarke" authorityYear="1897" box="[895,1140,1201,1227]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="36" pageNumber="37" phylum="Tracheophyta" rank="species" species="nicolleti">
<emphasis box="[895,1140,1201,1227]" italics="true" pageId="36" pageNumber="37">
Orthoceras
<taxonomicName box="[1044,1140,1201,1227]" pageId="36" pageNumber="37" rank="species" species="nicolleti">nicolleti</taxonomicName>
</emphasis>
</taxonomicName>
from the Platteville Formation, Sandbian-early Katian of
<collectingRegion box="[637,760,1236,1262]" country="United States of America" name="Wisconsin" pageId="36" pageNumber="37">Wisconsin</collectingRegion>
(
<bibRefCitation author="Foerste A. F." box="[777,935,1236,1262]" pageId="36" pageNumber="37" 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>
) with respect to the wide, pronounced annulation and the curvature of the conch. The Platteville specimen is poorly known, as no details of the conch surface are preserved and this is the only known specimen. It differs from
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[1123,1385,1307,1333]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[1123,1385,1307,1333]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis box="[189,339,1342,1368]" italics="true" pageId="36" pageNumber="37">nicolletoides</emphasis>
sp. nov. in its larger size, central siphuncle and nearly circular conch cross section.
</paragraph>
<paragraph blockId="36.[189,1399,1407,1645]" pageId="36" pageNumber="37">
<bibRefCitation author="Teichert C." box="[189,373,1407,1434]" pageId="36" pageNumber="37" pagination="264 - 312" refId="ref49750" refString="Teichert C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Palaontologische Zeitschrift 12: 264 - 312." type="journal article" year="1930">Teichert (1930)</bibRefCitation>
assigned a specimen from the Pirgu Regional Stage of
<collectingCountry box="[1058,1146,1407,1433]" name="Estonia" pageId="36" pageNumber="37">Estonia</collectingCountry>
to
<emphasis box="[1190,1321,1408,1434]" italics="true" pageId="36" pageNumber="37">Syproceras</emphasis>
<taxonomicName authority="(Roemer, 1861)" baseAuthorityName="Roemer" baseAuthorityYear="1861" class="Cephalopoda" family="Proteoceratidae" genus="Gorbyoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="species" species="textumaraneum">
<emphasis italics="true" pageId="36" pageNumber="37">textumaraneum</emphasis>
(
<bibRefCitation author="Roemer C. F." box="[327,493,1442,1469]" pageId="36" pageNumber="37" refId="ref49074" refString="Roemer C. F. 1861. Die fossile Fauna der silurischen Diluvial-Geschiebe von Sadewitz bei Oels in Nieder-Schlsien. Breslau." type="book" year="1861">Roemer, 1861</bibRefCitation>
)
</taxonomicName>
which can be compared with
<taxonomicName authorityName="Clarke" authorityYear="1897" box="[837,1071,1443,1469]" class="Liliopsida" family="Orchidaceae" genus="Orthoceras" kingdom="Plantae" order="Asparagales" pageId="36" pageNumber="37" phylum="Tracheophyta" rank="species" species="nicolleti">
<emphasis box="[837,1071,1443,1469]" italics="true" pageId="36" pageNumber="37">
Orthoceras
<taxonomicName box="[975,1071,1443,1469]" pageId="36" pageNumber="37" rank="species" species="nicolleti">nicolleti</taxonomicName>
</emphasis>
</taxonomicName>
and
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[1123,1385,1443,1469]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[1123,1385,1443,1469]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis box="[189,339,1478,1504]" italics="true" pageId="36" pageNumber="37">nicolletoides</emphasis>
sp. nov. with regard to its relatively large adult size, curved body chamber and distant annulations. The ornamentation of this specimen is not preserved, casting a degree of uncertainty on
<bibRefCitation author="Teichert C." box="[189,392,1548,1574]" pageId="36" pageNumber="37" pagination="264 - 312" refId="ref49750" refString="Teichert C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Palaontologische Zeitschrift 12: 264 - 312." type="journal article" year="1930">Teicherts (1930)</bibRefCitation>
assignment to
<emphasis box="[578,909,1549,1575]" italics="true" pageId="36" pageNumber="37">
<taxonomicName authorityName="Kröger" authorityYear="2013" baseAuthorityName="Roemer" baseAuthorityYear="1861" box="[578,905,1549,1575]" class="Cephalopoda" family="Pseudorthoceratidae" genus="Spyroceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="species" species="textumaraneum">
Spyroceras
<taxonomicName box="[719,905,1549,1574]" pageId="36" pageNumber="37" rank="species" species="textumaraneum">textumaraneum</taxonomicName>
</taxonomicName>
.
</emphasis>
The specimen of
<bibRefCitation author="Teichert C." box="[1128,1312,1548,1574]" pageId="36" pageNumber="37" pagination="264 - 312" refId="ref49750" refString="Teichert C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Palaontologische Zeitschrift 12: 264 - 312." type="journal article" year="1930">Teichert (1930)</bibRefCitation>
differs from
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[254,516,1583,1609]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[254,516,1583,1609]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis box="[538,688,1583,1609]" italics="true" pageId="36" pageNumber="37">nicolletoides</emphasis>
sp. nov. in having a narrower and shallower annulation and a larger adult size.
</paragraph>
<paragraph blockId="36.[189,1399,1684,1887]" pageId="36" pageNumber="37">
<bibRefCitation author="Balashov E. G." box="[189,379,1684,1711]" pageId="36" pageNumber="37" pagination="63 - 101" refId="ref46594" refString="Balashov E. G. 1975. Cefalopody molodovskogo i kitayogorodskogo gorizontov Podolii. Voprosy Paleontologii 7: 63 - 101." type="journal article" year="1975">Balashov (1975</bibRefCitation>
: pl. 1, figs 3-6) figured several annulated and longitudinally striated orthocerids under the name
<taxonomicName authority="Flower, 1946" authorityName="Flower" authorityYear="1946" box="[312,765,1719,1745]" class="Cephalopoda" family="Proteoceratidae" genus="Gorbyoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="species" species="duncanae">
<emphasis box="[312,465,1719,1745]" italics="true" pageId="36" pageNumber="37">Gorbyoceras</emphasis>
<taxonomicName authority="Flower" authorityName="Flower" authorityYear="1946" box="[477,765,1719,1745]" pageId="36" pageNumber="37" rank="species" species="duncanae">
<taxonomicName box="[477,591,1719,1745]" pageId="36" pageNumber="37" rank="species" species="duncanae">
<emphasis box="[477,591,1719,1745]" italics="true" pageId="36" pageNumber="37">duncanae</emphasis>
</taxonomicName>
<bibRefCitation author="Flower R. H." box="[602,765,1719,1745]" pageId="36" pageNumber="37" 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>
</taxonomicName>
</taxonomicName>
. However, conch shape, ornamentation and internal characters indicate that these specimens are better assigned to
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[897,1159,1754,1780]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[897,1159,1754,1780]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
. The ornamentation, annulation and general shell shape of the specimen figured in
<bibRefCitation author="Balashov E. G." box="[912,1102,1789,1816]" pageId="36" pageNumber="37" pagination="63 - 101" refId="ref46594" refString="Balashov E. G. 1975. Cefalopody molodovskogo i kitayogorodskogo gorizontov Podolii. Voprosy Paleontologii 7: 63 - 101." type="journal article" year="1975">Balashov (1975</bibRefCitation>
: pl. 1, figs 7) is similar to
<taxonomicName authorityName="Kroger &amp; Isakar" authorityYear="2006" box="[189,451,1825,1851]" class="Cephalopoda" family="Dawsonoceratidae" genus="Palaeodawsonocerina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Orthocerida" pageId="36" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis box="[189,451,1825,1851]" italics="true" pageId="36" pageNumber="37">Palaeodawsonocerina</emphasis>
</taxonomicName>
?
<emphasis box="[471,621,1825,1851]" italics="true" pageId="36" pageNumber="37">nicolletoides</emphasis>
sp. nov., but a direct comparison based on the incomplete material is not possible.
</paragraph>
</subSubSection>
<subSubSection pageId="36" pageNumber="37" type="multiple">
<paragraph blockId="36.[189,637,1925,1952]" box="[189,637,1925,1952]" pageId="36" pageNumber="37">
<heading bold="true" box="[189,637,1925,1952]" fontSize="11" level="3" pageId="36" pageNumber="37" reason="3">
<emphasis bold="true" box="[189,637,1925,1952]" pageId="36" pageNumber="37">Stratigraphic and geographic range</emphasis>
</heading>
</paragraph>
<paragraph blockId="36.[189,966,1972,1998]" box="[189,966,1972,1998]" pageId="36" pageNumber="37">
Boda Limestone, Siljan District,
<collectingCountry box="[575,672,1972,1998]" name="Sweden" pageId="36" pageNumber="37">Sweden</collectingCountry>
; late Katian, Ordovician.
</paragraph>
</subSubSection>
</treatment>
</document>