treatments-xml/data/93/27/59/9327592FF427195CFD671C6EFD7653CA.xml

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<document id="1AE53207552FE54EB447BC350938076B" ID-CLB-Dataset="105313" ID-DOI="10.5852/ejt.2022.831.1871" ID-GBIF-Dataset="e697ba5c-5a96-4a28-985c-748890333d6c" ID-ISSN="2118-9773" ID-Zenodo-Dep="6885198" ID-ZooBank="EAA2EAE2-DA8B-4516-B332-CB8423B8EEAA" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1658507519427" checkinUser="felipe" docAuthor="Korn, Dieter &amp; Bockwinkel, Jürgen" docDate="2022" docId="9327592FF427195CFD671C6EFD7653CA" docLanguage="en" docName="ejt-831_67-108.pdf" docOrigin="European Journal of Taxonomy 831" docSource="http://dx.doi.org/10.5852/ejt.2022.831.1871" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.14:EJT.2018-.journal_article.type1" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article.type1" docStyleVersion="14" docTitle="Stroboceras Hyatt 1884" docType="treatment" docVersion="8" lastPageNumber="81" masterDocId="6F1E2157F42A1952FFE11E6BFF97516E" masterDocTitle="Early Carboniferous nautiloids from the Central Sahara, southern Algeria" masterLastPageNumber="108" masterPageNumber="67" pageNumber="80" updateTime="1699361693651" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="894A3341D9AFDA9D8589E5D465501C4B">Early Carboniferous nautiloids from the Central Sahara, southern Algeria</mods:title>
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<mods:namePart id="C6F042FA90A3D60686FBDB104A4E89D6">Korn, Dieter</mods:namePart>
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<mods:affiliation id="529A3B78BDF1BDE62C2F2984FF92B03C">Museum für Naturkunde, Leibniz Institut for Research on Evolution and Biodiversity, Invalidenstrasse 43, 10115 Berlin, Germany.</mods:affiliation>
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<mods:namePart id="06C5398113C64EF065ACF60599507B9E">Bockwinkel, Jürgen</mods:namePart>
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<mods:title id="833FBBBD73EED6F7B7C95996E042AA0C">European Journal of Taxonomy</mods:title>
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<mods:date id="E4338F61A32ADBA89FC42B2EBD9ECC47">2022</mods:date>
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<treatment id="9327592FF427195CFD671C6EFD7653CA" ID-DOI="http://doi.org/10.5281/zenodo.6903290" ID-GBIF-Taxon="197852061" ID-Zenodo-Dep="6903290" LSID="urn:lsid:plazi:treatment:9327592FF427195CFD671C6EFD7653CA" httpUri="http://treatment.plazi.org/id/9327592FF427195CFD671C6EFD7653CA" lastPageId="14" lastPageNumber="81" pageId="13" pageNumber="80">
<subSubSection id="5394BBB2F427195FFD671C6EFC6D5371" box="[646,1018,517,544]" pageId="13" pageNumber="80" type="nomenclature">
<paragraph id="1B31E839F427195FFD671C6EFC6D5371" blockId="13.[646,1018,517,544]" box="[646,1018,517,544]" pageId="13" pageNumber="80">
<heading id="40795F55F427195FFD671C6EFC6D5371" box="[646,1018,517,544]" centered="true" fontSize="11" level="2" pageId="13" pageNumber="80" reason="2">
Genus
<taxonomicName id="DC8E93BAF427195FFD391C6EFC6D5371" authority="Hyatt, 1884" authorityName="Hyatt" authorityYear="1884" box="[728,1018,517,544]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFD391C6EFCF0534E" bold="true" box="[728,871,517,544]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
Hyatt, 1884
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="5394BBB2F427195FFF021C2DFC1453E0" pageId="13" pageNumber="80" type="type_taxon">
<paragraph id="1B31E839F427195FFF021C2DFEEA530E" blockId="13.[227,381,582,608]" box="[227,381,582,608]" pageId="13" pageNumber="80">
<heading id="40795F55F427195FFF021C2DFEEA530E" bold="true" box="[227,381,582,608]" fontSize="11" level="3" pageId="13" pageNumber="80" reason="3">
<emphasis id="29FA342BF427195FFF021C2DFEEA530E" bold="true" box="[227,381,582,608]" pageId="13" pageNumber="80">
<typeStatus id="C435569BF427195FFF021C2DFEB7530E" box="[227,288,582,608]" pageId="13" pageNumber="80">Type</typeStatus>
species
</emphasis>
</heading>
</paragraph>
<paragraph id="1B31E839F427195FFF021C1FFC1453E0" blockId="13.[227,899,628,655]" box="[227,899,628,655]" pageId="13" pageNumber="80">
<taxonomicName id="DC8E93BAF427195FFF021C1FFDF653E1" authority="Hartii Dawson, 1858" authorityName="Hartii Dawson" authorityYear="1858" box="[227,609,628,655]" class="Cephalopoda" family="Mimoceratidae" genus="Gyroceras" kingdom="Animalia" order="Ammonoidea" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFF021C1FFE3A53E0" box="[227,429,628,654]" italics="true" pageId="13" pageNumber="80">Gyroceras Hartii</emphasis>
Dawson, 1858
</taxonomicName>
; by original designation.
</paragraph>
</subSubSection>
<subSubSection id="5394BBB2F427195FFF021CDEFE3F52A3" pageId="13" pageNumber="80" type="diagnosis">
<paragraph id="1B31E839F427195FFF021CDEFECB53A1" blockId="13.[227,348,693,719]" box="[227,348,693,719]" pageId="13" pageNumber="80">
<heading id="40795F55F427195FFF021CDEFECB53A1" bold="true" box="[227,348,693,719]" fontSize="11" level="3" pageId="13" pageNumber="80" reason="3">
<emphasis id="29FA342BF427195FFF021CDEFECB53A1" bold="true" box="[227,348,693,719]" pageId="13" pageNumber="80">Diagnosis</emphasis>
</heading>
</paragraph>
<paragraph id="1B31E839F427195FFF021C88FE3F52A3" blockId="13.[227,1438,739,973]" pageId="13" pageNumber="80">
Genus of the family
<taxonomicName id="DC8E93BAF427195FFE3A1C88FD355393" authorityName="Hyatt" authorityYear="1884" box="[475,674,739,765]" class="Cephalopoda" family="Trigonoceratidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="family">Trigonoceratidae</taxonomicName>
with discoidal, evolute conch; whorls slightly embracing, outer whorl may have lose contact with preceding whorls. Adult conch with a polygonal whorl profile; venter slightly convex, flattened, less often slightly concave, flanks almost flat or irregularly concave, dorsum slightly concave. Prominent longitudinal keels usually well developed, separated by concave zones. Suture line with small lobes and saddles reflecting keels and longitudinal grooves on the surface of the conch. Siphuncle small with subcentral position between septum centre and venter (after
<bibRefCitation id="7F1F95C8F427195FFAFB1DFBFEB652A3" author="Shimansky V. N." pageId="13" pageNumber="80" pagination="1 - 244" refId="ref18477" refString="Shimansky V. N. 1967. Kamennougol'nye Nautilida. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR 115: 1 - 244." type="journal article" year="1967">Shimansky 1967</bibRefCitation>
; emended).
</paragraph>
</subSubSection>
<subSubSection id="5394BBB2F427195FFF021D9FFA0F5587" pageId="13" pageNumber="80" type="reference_group">
<paragraph id="1B31E839F427195FFF021D9FFE385563" blockId="13.[227,431,1011,1038]" box="[227,431,1011,1038]" pageId="13" pageNumber="80">
<heading id="40795F55F427195FFF021D9FFE385563" bold="true" box="[227,431,1011,1038]" fontSize="11" level="3" pageId="13" pageNumber="80" reason="3">
<emphasis id="29FA342BF427195FFF021D9FFE385563" bold="true" box="[227,431,1011,1038]" pageId="13" pageNumber="80">Included species</emphasis>
</heading>
</paragraph>
<paragraph id="1B31E839F427195FFF021A49FA0F5587" blockId="13.[227,1437,1058,1258]" pageId="13" pageNumber="80">
<taxonomicName id="DC8E93BAF427195FFF021A49FD335553" authority="Eichwald, 1857" authorityName="Eichwald" authorityYear="1857" box="[227,676,1058,1085]" class="Cephalopoda" family="Nautilidae" genus="Nautilus" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="ammoneus">
<emphasis id="29FA342BF427195FFF021A49FE455552" box="[227,466,1058,1084]" italics="true" pageId="13" pageNumber="80">Nautilus ammoneus</emphasis>
Eichwald, 1857
</taxonomicName>
, South Urals;
<taxonomicName id="DC8E93BAF427195FFC831A49FA985552" authority="Hyatt, 1893" authorityName="Hyatt" authorityYear="1893" box="[866,1295,1058,1084]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="anglicum">
<emphasis id="29FA342BF427195FFC831A49FBFC5552" box="[866,1131,1058,1084]" italics="true" pageId="13" pageNumber="80">Stroboceras anglicum</emphasis>
Hyatt, 1893
</taxonomicName>
, Yorkshire;
<taxonomicName id="DC8E93BAF427195FFF021A2FFD5D5531" authority="de Verneuil, 1845" authorityName="de Verneuil" authorityYear="1845" box="[227,714,1092,1119]" class="Cephalopoda" family="Nautilidae" genus="Nautilus" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="bicarinatus">
<emphasis id="29FA342BF427195FFF021A2FFE4C5530" box="[227,475,1092,1118]" italics="true" pageId="13" pageNumber="80">Nautilus bicarinatus</emphasis>
de Verneuil, 1845
</taxonomicName>
, South Urals;
<taxonomicName id="DC8E93BAF427195FFC661A2FFEB755EF" authority="Ramsbottom &amp; Moore, 1961" authorityName="Ramsbottom &amp; Moore" authorityYear="1961" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="evansi">
<emphasis id="29FA342BF427195FFC661A2FFBF95530" box="[903,1134,1092,1118]" italics="true" pageId="13" pageNumber="80">Stroboceras evansi</emphasis>
Ramsbottom &amp; Moore, 1961
</taxonomicName>
,
<collectingCountry id="6399A8A9F427195FFECF1A0CFE1255EF" box="[302,389,1127,1153]" name="Ireland" pageId="13" pageNumber="80">Ireland</collectingCountry>
;
<taxonomicName id="DC8E93BAF427195FFE721A0CFC1B55EC" authority="Niko &amp; Mapes, 2005" authorityName="Niko &amp; Mapes" authorityYear="2005" box="[403,908,1127,1154]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="gordoni">
<emphasis id="29FA342BF427195FFE721A0CFD1455EF" box="[403,643,1127,1153]" italics="true" pageId="13" pageNumber="80">Stroboceras gordoni</emphasis>
Niko &amp; Mapes, 2005
</taxonomicName>
, Arkansas;
<taxonomicName id="DC8E93BAF427195FFBF71A03FA0055EC" authority="Hartii Dawson, 1858" authorityName="Hartii Dawson" authorityYear="1858" box="[1046,1431,1127,1154]" class="Cephalopoda" family="Mimoceratidae" genus="Gyroceras" kingdom="Animalia" order="Ammonoidea" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFBF71A03FB7555EF" box="[1046,1250,1128,1154]" italics="true" pageId="13" pageNumber="80">Gyroceras Hartii</emphasis>
Dawson, 1858
</taxonomicName>
; Nova Scotia;
<taxonomicName id="DC8E93BAF427195FFE691AE1FCFC55CB" authority="Schmidt, 1951" authorityName="Schmidt" authorityYear="1951" box="[392,875,1162,1189]" class="Cephalopoda" family="Goniatitidae" genus="Coelonautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ammonoidea" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="humerosus">
<emphasis id="29FA342BF427195FFE691AE1FD2555CA" box="[392,690,1162,1188]" italics="true" pageId="13" pageNumber="80">Coelonautilus humerosus</emphasis>
Schmidt, 1951
</taxonomicName>
, Rhenish Mountains;
<taxonomicName id="DC8E93BAF427195FFB951AE1FE7855A9" authority="Miller &amp; Garner, 1953" authorityName="Miller &amp; Garner" authorityYear="1953" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="intermedium">
<emphasis id="29FA342BF427195FFB951AE1FA0B55CA" box="[1140,1436,1162,1188]" italics="true" pageId="13" pageNumber="80">Stroboceras intermedium</emphasis>
<bibRefCitation id="7F1F95C8F427195FFF021AC7FE7855A9" author="Miller A. K. &amp; Garner H. F." box="[227,495,1196,1223]" pageId="13" pageNumber="80" pagination="111 - 151" refId="ref18389" refString="Miller A. K. &amp; Garner H. F. 1953. Lower Mississippian cephalopods of Michigan. Part II. Coiled nautiloids. Contributions of the Museum of Paleontology, University of Michigan 11: 111 - 151." type="journal article" year="1953">Miller &amp; Garner, 1953</bibRefCitation>
</taxonomicName>
, Michigan;
<taxonomicName id="DC8E93BAF427195FFD9C1AC7FBD455A8" authority="Shimansky, 1967" authorityName="Shimansky" authorityYear="1967" box="[637,1091,1196,1222]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="mstense">
<emphasis id="29FA342BF427195FFD9C1AC7FCF955A8" box="[637,878,1196,1222]" italics="true" pageId="13" pageNumber="80">Stroboceras mstense</emphasis>
<bibRefCitation id="7F1F95C8F427195FFC971AC7FBD455A8" author="Shimansky V. N." box="[886,1091,1196,1222]" pageId="13" pageNumber="80" pagination="1 - 244" refId="ref18477" refString="Shimansky V. N. 1967. Kamennougol'nye Nautilida. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR 115: 1 - 244." type="journal article" year="1967">Shimansky, 1967</bibRefCitation>
</taxonomicName>
, Moscow Basin;
<taxonomicName id="DC8E93BAF427195FFAF11AC7FE435584" authority="Schmidt, 1951" authorityName="Schmidt" authorityYear="1951" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="trifer">
<emphasis id="29FA342BF427195FFAF11AC7FE885587" italics="true" pageId="13" pageNumber="80">Stroboceras trifer</emphasis>
Schmidt, 1951
</taxonomicName>
, Silesia;
<taxonomicName id="DC8E93BAF427195FFDDF1AA4FC855587" authority="Korn &amp; Bockwinkel, 2022" authorityName="Korn &amp; Bockwinkel" authorityYear="2022" box="[574,786,1231,1257]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="mane" status="sp. nov.">
<emphasis id="29FA342BF427195FFDDF1AA4FC855587" box="[574,786,1231,1257]" italics="true" pageId="13" pageNumber="80">Stroboceras mane</emphasis>
</taxonomicName>
<taxonomicNameLabel id="32C98950F427195FFCF81ABBFCE15584" box="[793,886,1232,1258]" pageId="13" pageNumber="80" rank="species">sp. nov.</taxonomicNameLabel>
,
<collectingCountry id="6399A8A9F427195FFC611AA4FC4B5587" box="[896,988,1231,1257]" name="Algeria" pageId="13" pageNumber="80">Algeria</collectingCountry>
;
<taxonomicName id="DC8E93BAF427195FFC061AA4FB5E5587" authority="Korn &amp; Bockwinkel, 2022" authorityName="Korn &amp; Bockwinkel" authorityYear="2022" box="[999,1225,1231,1257]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="ancilis" status="sp. nov.">
<emphasis id="29FA342BF427195FFC061AA4FB5E5587" box="[999,1225,1231,1257]" italics="true" pageId="13" pageNumber="80">Stroboceras ancilis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="32C98950F427195FFB301ABBFAB95584" box="[1233,1326,1232,1258]" pageId="13" pageNumber="80" rank="species">sp. nov.</taxonomicNameLabel>
,
<collectingCountry id="6399A8A9F427195FFAD91AA4FA035587" box="[1336,1428,1231,1257]" name="Algeria" pageId="13" pageNumber="80">Algeria</collectingCountry>
.
</paragraph>
</subSubSection>
<subSubSection id="5394BBB2F427195CFF021B7BFD7653CA" lastPageId="14" lastPageNumber="81" pageId="13" pageNumber="80" type="discussion">
<paragraph id="1B31E839F427195FFF021B7BFEC25444" blockId="13.[227,341,1296,1322]" box="[227,341,1296,1322]" pageId="13" pageNumber="80">
<heading id="40795F55F427195FFF021B7BFEC25444" bold="true" box="[227,341,1296,1322]" fontSize="11" level="3" pageId="13" pageNumber="80" reason="3">
<emphasis id="29FA342BF427195FFF021B7BFEC25444" bold="true" box="[227,341,1296,1322]" pageId="13" pageNumber="80">Remarks</emphasis>
</heading>
</paragraph>
<paragraph id="1B31E839F427195FFF021B55FDCA576B" blockId="13.[227,1437,1342,1542]" pageId="13" pageNumber="80">
A systematic treatment of the morphologically diverse
<taxonomicName id="DC8E93BAF427195FFC621B55FB875436" authorityName="Hyatt" authorityYear="1884" box="[899,1040,1342,1368]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFC621B55FB875436" box="[899,1040,1342,1368]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
</taxonomicName>
form complex is difficult and it is not clear what the relationships between the numerous species are.
<bibRefCitation id="7F1F95C8F427195FFBDD1B0AFB735415" author="Turner J. S." box="[1084,1252,1376,1403]" pageId="13" pageNumber="80" pagination="298 - 325" refId="ref18664" refString="Turner J. S. 1954. On the Carboniferous nautiloids: some Middle Visean species from the Isle of Man. Liverpool and Manchester Geological Journal 1: 298 - 325. https: // doi. org / 10.1002 / gj. 3350010307" type="journal article" year="1954">Turner (1954)</bibRefCitation>
introduced the genus
<taxonomicName id="DC8E93BAF427195FFED01BE8FE7454F3" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[305,483,1411,1437]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFED01BE8FE7454F3" box="[305,483,1411,1437]" italics="true" pageId="13" pageNumber="80">Epistroboceras</emphasis>
</taxonomicName>
to separate the laterally compressed forms. These forms are supposed to differ from
<taxonomicName id="DC8E93BAF427195FFEC71BCDFE2454AE" authorityName="Hyatt" authorityYear="1884" box="[294,435,1446,1472]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFEC71BCDFE2454AE" box="[294,435,1446,1472]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
</taxonomicName>
by the narrower coiling:
<taxonomicName id="DC8E93BAF427195FFD0A1BCDFCEF54AE" authorityName="Hyatt" authorityYear="1884" box="[747,888,1446,1472]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFD0A1BCDFCEF54AE" box="[747,888,1446,1472]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
</taxonomicName>
should be tarphophioceraconic (i.e., with the last whorl detached), while
<taxonomicName id="DC8E93BAF427195FFDCB1BA2FD4B548D" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[554,732,1481,1507]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFDCB1BA2FD4B548D" box="[554,732,1481,1507]" italics="true" pageId="13" pageNumber="80">Epistroboceras</emphasis>
</taxonomicName>
should be tarphyceraconic (i.e., with the last whorl in close contact with the preceding one).
</paragraph>
<paragraph id="1B31E839F427195FFF021847FB265632" blockId="13.[226,1436,1580,1884]" pageId="13" pageNumber="80">
This distinguishing criterion was also mentioned by
<bibRefCitation id="7F1F95C8F427195FFCBC1847FB8E5728" author="Kummel B." box="[861,1049,1580,1606]" pageId="13" pageNumber="80" pagination="466" refId="ref18219" refString="Kummel B. 1964. Nautiloidea-Nautilida. In: Moore R. C. (ed.) Treatise on Invertebrate Paleontology: K 383 - K 466. The Geological Society of America and The University of Kansas Press, Lawrence, KS." type="book chapter" year="1964">Kummel (1964)</bibRefCitation>
, but
<bibRefCitation id="7F1F95C8F427195FFBBD1847FA995729" author="Gordon M." box="[1116,1294,1580,1607]" pageId="13" pageNumber="80" pagination="1 - 322" refId="ref17719" refString="Gordon M. jr. 1965. Carboniferous Cephalopods of Arkansas. Professional Papers, U. S. Geological Survey 460: 1 - 322. https: // doi. org / 10.3133 / pp 460" type="journal article" year="1965">Gordon (1965)</bibRefCitation>
pointed out that only the type species
<taxonomicName id="DC8E93BAF427195FFDF71824FDE25707" box="[534,629,1615,1641]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="species" species="hartii">
<emphasis id="29FA342BF427195FFDF71824FDE25707" box="[534,629,1615,1641]" italics="true" pageId="13" pageNumber="80">S. hartii</emphasis>
</taxonomicName>
has a straightened-out whorl at maturity. However,
<bibRefCitation id="7F1F95C8F427195FFB3A1824FEA557E2" author="Miller A. K. &amp; Garner H. F." pageId="13" pageNumber="80" pagination="111 - 151" refId="ref18389" refString="Miller A. K. &amp; Garner H. F. 1953. Lower Mississippian cephalopods of Michigan. Part II. Coiled nautiloids. Contributions of the Museum of Paleontology, University of Michigan 11: 111 - 151." type="journal article" year="1953">Miller &amp; Garner (1953)</bibRefCitation>
had already pointed out that the
<typeStatus id="C435569BF427195FFD4C1819FC8357E2" box="[685,788,1650,1676]" pageId="13" pageNumber="80" type="holotype">holotype</typeStatus>
of this species is “slightly crushed”. They also reported “… that the conch is coiled and is very slightly involute; though at full maturity the adoral portion of the body chamber straightens and loses contact with the preceding whorl but retains, however, the slight impressed zone.” (
<bibRefCitation id="7F1F95C8F427195FFDE418B1FCD1579A" author="Miller A. K. &amp; Garner H. F." box="[517,838,1753,1780]" pageId="13" pageNumber="80" pagination="111 - 151" refId="ref18389" refString="Miller A. K. &amp; Garner H. F. 1953. Lower Mississippian cephalopods of Michigan. Part II. Coiled nautiloids. Contributions of the Museum of Paleontology, University of Michigan 11: 111 - 151." type="journal article" year="1953">Miller &amp; Garner 1953: 134</bibRefCitation>
). This combination of characters is questionable; a concave whorl zone is practically always created by enclosing the preceding whorl. Therefore, it cannot be excluded that it is a preservation effect.
<bibRefCitation id="7F1F95C8F427195FFD3E1974FC185654" author="Gordon M." box="[735,911,1823,1850]" pageId="13" pageNumber="80" pagination="1 - 322" refId="ref17719" refString="Gordon M. jr. 1965. Carboniferous Cephalopods of Arkansas. Professional Papers, U. S. Geological Survey 460: 1 - 322. https: // doi. org / 10.3133 / pp 460" type="journal article" year="1965">Gordon (1965)</bibRefCitation>
accepted
<taxonomicName id="DC8E93BAF427195FFBE41974FB205657" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[1029,1207,1823,1849]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFBE41974FB205657" box="[1029,1207,1823,1849]" italics="true" pageId="13" pageNumber="80">Epistroboceras</emphasis>
</taxonomicName>
only as a subgenus of
<taxonomicName id="DC8E93BAF427195FFEE21929FE075632" authorityName="Hyatt" authorityYear="1884" box="[259,400,1858,1884]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFEE21929FE075632" box="[259,400,1858,1884]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
</taxonomicName>
, distinguished by the loss of longitudinal sculpture in late ontogeny.
</paragraph>
<paragraph id="1B31E839F427195FFF0219E9FD7B5968" blockId="13.[227,1437,1922,2054]" pageId="13" pageNumber="80">
<bibRefCitation id="7F1F95C8F427195FFF0219E9FE2A56F2" author="Shimansky V. N." box="[227,445,1922,1948]" pageId="13" pageNumber="80" pagination="1 - 244" refId="ref18477" refString="Shimansky V. N. 1967. Kamennougol'nye Nautilida. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR 115: 1 - 244." type="journal article" year="1967">Shimansky (1967)</bibRefCitation>
discussed the relationship between the two genera in detail and concluded that the relationships and boundaries of the genera
<taxonomicName id="DC8E93BAF427195FFD0019CEFCF956D1" authorityName="Hyatt" authorityYear="1884" box="[737,878,1957,1983]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFD0019CEFCF956D1" box="[737,878,1957,1983]" italics="true" pageId="13" pageNumber="80">Stroboceras</emphasis>
</taxonomicName>
and
<taxonomicName id="DC8E93BAF427195FFC4819CEFBCC56D1" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[937,1115,1957,1983]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="13" pageNumber="80" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF427195FFC4819CEFBCC56D1" box="[937,1115,1957,1983]" italics="true" pageId="13" pageNumber="80">Epistroboceras</emphasis>
</taxonomicName>
were not entirely clear. He considered it possible that, in addition to the whorl profile, the size of the umbilical window could also serve to distinguish between the two genera.
</paragraph>
<paragraph id="1B31E839F424195CFF021F44FBD35097" blockId="14.[226,1436,303,505]" pageId="14" pageNumber="81">
<bibRefCitation id="7F1F95C8F424195CFF021F44FE1C5027" author="Histon K." box="[227,395,303,329]" pageId="14" pageNumber="81" pagination="63 - 129" refId="ref17790" refString="Histon K. 1999. A revision of A. H. Foord's monograph of Irish Carboniferous nautiloid cephalopods (1897 - 1901). Part 2. Monographs of the Palaeontographical Society: 63 - 129." type="book chapter" year="1999">Histon (1999)</bibRefCitation>
characterised the genus
<taxonomicName id="DC8E93BAF424195CFD5F1F44FCE75027" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[702,880,303,329]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFD5F1F44FCE75027" box="[702,880,303,329]" italics="true" pageId="14" pageNumber="81">Epistroboceras</emphasis>
</taxonomicName>
, among other characteristics, by the strongly compressed conch, converging flanks and narrow concave venter. More recently,
<bibRefCitation id="7F1F95C8F424195CFB781F39FA0B5002" author="Niko S. &amp; Mapes R. H." box="[1177,1436,338,365]" pageId="14" pageNumber="81" pagination="341 - 344" refId="ref18430" refString="Niko S. &amp; Mapes R. H. 2004. A new Early Carboniferous nautilid from the Caney Formation of Oklahoma, Central North America. Paleontological Research 8: 341 - 344. https: // doi. org / 10.2517 / prpsj. 8.341" type="journal article" year="2004">Niko &amp; Mapes (2004)</bibRefCitation>
discussed the relationship between
<taxonomicName id="DC8E93BAF424195CFD6B1F1EFC8050E1" authorityName="Hyatt" authorityYear="1884" box="[650,791,373,399]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFD6B1F1EFC8050E1" box="[650,791,373,399]" italics="true" pageId="14" pageNumber="81">Stroboceras</emphasis>
</taxonomicName>
and
<taxonomicName id="DC8E93BAF424195CFCB21F1EFB9450E1" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[851,1027,373,399]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFCB21F1EFB9450E1" box="[851,1027,373,399]" italics="true" pageId="14" pageNumber="81">Epistroboceras</emphasis>
</taxonomicName>
; in distinguishing the two genera, they upheld the presumed detachment of the adult whorl in
<taxonomicName id="DC8E93BAF424195CFC721FF3FBB750DC" authorityName="Hyatt" authorityYear="1884" box="[915,1056,408,434]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFC721FF3FBB750DC" box="[915,1056,408,434]" italics="true" pageId="14" pageNumber="81">Stroboceras</emphasis>
</taxonomicName>
. As a further difference between the two genera, they mentioned that the “… lateral grooves developed in the juvenile stage become obsolescent with maturity” in
<taxonomicName id="DC8E93BAF424195CFDA51FB4FBA95097" authority="(Niko &amp; Mapes 2004: 341)" baseAuthorityName="Niko &amp; Mapes" baseAuthorityPageNumber="341" baseAuthorityYear="2004" box="[580,1086,479,505]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFDA51FB4FD615097" box="[580,758,479,505]" italics="true" pageId="14" pageNumber="81">Epistroboceras</emphasis>
(
<bibRefCitation id="7F1F95C8F424195CFCE71FB4FBA35097" author="Niko S. &amp; Mapes R. H." box="[774,1076,479,505]" pageId="14" pageNumber="81" pagination="341 - 344" refId="ref18430" refString="Niko S. &amp; Mapes R. H. 2004. A new Early Carboniferous nautilid from the Caney Formation of Oklahoma, Central North America. Paleontological Research 8: 341 - 344. https: // doi. org / 10.2517 / prpsj. 8.341" type="journal article" year="2004">Niko &amp; Mapes 2004: 341</bibRefCitation>
)
</taxonomicName>
.
</paragraph>
<paragraph id="1B31E839F424195CFF021C4BFD7653CA" blockId="14.[226,1436,544,676]" pageId="14" pageNumber="81">
The distinction between the two genera is an issue that cannot be solved with the material available from the Sahara Desert, it is beyond the scope of our investigations. For the time being, we follow the path suggested by
<bibRefCitation id="7F1F95C8F424195CFE601C0CFDCE53EE" author="Shimansky V. N." box="[385,601,614,641]" pageId="14" pageNumber="81" pagination="1 - 244" refId="ref18477" refString="Shimansky V. N. 1967. Kamennougol'nye Nautilida. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR 115: 1 - 244." type="journal article" year="1967">Shimansky (1967)</bibRefCitation>
of grouping the forms with a broad venter under
<taxonomicName id="DC8E93BAF424195CFB781C0CFAB153EF" authorityName="Hyatt" authorityYear="1884" box="[1177,1318,615,641]" class="Cephalopoda" family="Trigonoceratidae" genus="Stroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFB781C0CFAB153EF" box="[1177,1318,615,641]" italics="true" pageId="14" pageNumber="81">Stroboceras</emphasis>
</taxonomicName>
and those with a narrow venter under
<taxonomicName id="DC8E93BAF424195CFDC91CE1FD4D53CA" baseAuthorityName="Niko &amp; Mapes" baseAuthorityYear="2004" box="[552,730,650,676]" class="Cephalopoda" family="Trigonoceratidae" genus="Epistroboceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="14" pageNumber="81" phylum="Mollusca" rank="genus">
<emphasis id="29FA342BF424195CFDC91CE1FD4D53CA" box="[552,730,650,676]" italics="true" pageId="14" pageNumber="81">Epistroboceras</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>