306 lines
34 KiB
XML
306 lines
34 KiB
XML
<document id="1A6ABA5D2D241D4C373C4474123D1434" ID-CLB-Dataset="298388" ID-DOI="10.5194/fr-18-81-2015" ID-GBIF-Dataset="49a593d2-44ce-420d-a608-8533ec6745ac" ID-ISSN="2193-0074" ID-Zenodo-Dep="11585625" IM.bibliography_approvedBy="carolina" IM.illustrations_approvedBy="carolina" IM.materialsCitations_approvedBy="carolina" IM.metadata_approvedBy="felipe" IM.tables_approvedBy="carolina" IM.taxonomicNames_approvedBy="carolina" IM.treatments_approvedBy="carolina" checkinTime="1716844663622" checkinUser="felipe" docAuthor="Titus, A. L., Korn, D., Harrell, J. E. & Lambert, L. L." docDate="2015" docId="039287BEFC5BFFA5FFA9FC24FD37FD5E" docLanguage="en" docName="FossRec.18.2.81-104.pdf" docOrigin="Fossil Record 18 (2)" docSource="http://dx.doi.org/10.5194/fr-18-81-2015" docStyle="DocumentStyle:1B3764FFAC190C6D25C29F616DE4358D.2:FossRec.2014-2021.journal_article" docStyleId="1B3764FFAC190C6D25C29F616DE4358D" docStyleName="FossRec.2014-2021.journal_article" docStyleVersion="2" docTitle="Girtyoceras meslerianum" docType="treatment" docVersion="7" lastPageNumber="88" masterDocId="FFABFFC6FC5CFFACFFD5FFF5FFC9FF94" masterDocTitle="Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA" masterLastPageNumber="104" masterPageNumber="81" pageNumber="88" updateTime="1718152557931" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="2E061B14CD22684C43426AFEC41EFF2B">Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA</mods:title>
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<mods:name id="F4AE1BE5930144D7A1EA61FA4F0E63DB" type="personal">
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<mods:namePart id="ED564A5465FA61DF20F2ACDF7B51CE0A">Titus, A. L.</mods:namePart>
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<mods:affiliation id="F1E95B85A00244F78309BC8556EF74AA">D. Korn & Grand Staircase-Escalante National Monument, 669 S. Highway 89 A, Kanab, UT 84741, USA</mods:affiliation>
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<mods:namePart id="A42345577BF4EB1E8422454A8DEE2774">Korn, D.</mods:namePart>
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<mods:affiliation id="EFE8B663B9435273D70D7498793E497E">J. E. Harrell & Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43,</mods:affiliation>
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<mods:namePart id="27EDD046C19D59097B6ECD489E537881">Harrell, J. E.</mods:namePart>
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<mods:affiliation id="EB14483076189A287D6DFD39542FC100">L. L. Lambert & Noble Energy Inc., Houston, TX 77070, USA</mods:affiliation>
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<mods:namePart id="3F123FE6FF986E975B904625F37F4B79">Lambert, L. L.</mods:namePart>
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<mods:affiliation id="2CB1A0008E8BE4C0AB16555FAC7DE0AB">Department of Geological Sciences, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA</mods:affiliation>
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<mods:title id="1028F929D0DEFC8C45D9B16BDEA76A2F">Fossil Record</mods:title>
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<mods:date id="E2A1B50DF0395E9080219DB1132E5444">2015</mods:date>
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<mods:number id="FC924A462BCA3DD3436AF09BB4B79FE9">18</mods:number>
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<treatment id="039287BEFC5BFFA5FFA9FC24FD37FD5E" ID-DOI="http://doi.org/10.5281/zenodo.11587090" ID-GBIF-Taxon="232731995" ID-Zenodo-Dep="11587090" LSID="urn:lsid:plazi:treatment:039287BEFC5BFFA5FFA9FC24FD37FD5E" httpUri="http://treatment.plazi.org/id/039287BEFC5BFFA5FFA9FC24FD37FD5E" lastPageId="9" lastPageNumber="88" pageId="7" pageNumber="88">
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<paragraph id="8B8436A8FC5BFFABFFA9FC24FD06FC7D" blockId="7.[124,719,977,1001]" box="[124,719,977,1001]" pageId="7" pageNumber="88">
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<heading id="D0CC81C4FC5BFFABFFA9FC24FD06FC7D" box="[124,719,977,1001]" fontSize="10" level="2" pageId="7" pageNumber="88" reason="4">
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<emphasis id="B94FEABAFC5BFFABFFA9FC24FD06FC7D" bold="true" box="[124,719,977,1001]" pageId="7" pageNumber="88">
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<taxonomicName id="4C3B4D2BFC5BFFABFFA9FC24FDE1FC7D" ID-CoL="6KHCN" authority="(Girty, 1909)" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[124,552,977,1001]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" order="Goniatitida" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
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<emphasis id="B94FEABAFC5BFFABFFA9FC24FE58FC7D" bold="true" box="[124,401,977,1001]" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
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(
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<bibRefCitation id="EFAA4B59FC5BFFABFE4AFC24FDE8FC7D" author="Girty, G. H." box="[415,545,977,1001]" pageId="7" pageNumber="88" pagination="1 - 106" refId="ref16650" refString="Girty, G. H.: The fauna of the Caney Shale of Oklahoma, Bulletin of the U. S. Geological Survey, 377, 1 - 106, 1909." type="journal article" year="1909">Girty, 1909</bibRefCitation>
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)
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</taxonomicName>
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(
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<figureCitation id="13002A2DFC5BFFABFDE3FC24FD48FC7D" box="[566,641,977,1001]" captionStart="Figure 6" captionStartId="7.[124,191,513,535]" captionTargetBox="[214,677,181,479]" captionTargetId="figure-15@7.[210,680,177,482]" captionTargetPageId="7" captionText="Figure 6. Girtyoceras meslerianum (Girty, 1909) from the Figure 2 Ranch section, Sierra Diablo. Specimen NPL 68364 from bed 17 (sample 00TXCU-25); × 4.0." figureDoi="http://doi.org/10.5281/zenodo.11585637" httpUri="https://zenodo.org/record/11585637/files/figure.png" pageId="7" pageNumber="88">Figs. 6</figureCitation>
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and
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<figureCitation id="13002A2DFC5BFFABFD6CFC24FD0EFC7D" box="[697,711,977,1001]" captionStart="Figure 7" captionStartId="8.[124,191,1506,1528]" captionTargetBox="[312,1256,657,1479]" captionTargetId="graphics-319@8.[770,1176,946,1165]" captionTargetPageId="8" captionText="Figure 7. Girtyoceras meslerianum (Girty, 1909), conch cross sections and ontogenetic trajectories of material from the Caney Shale of Jackfork Creek near Ada, Oklahoma (a–d). (a) Specimen MB.C.25466; × 2.5. (b) Specimen MB.C.25467; × 2.5. (c) Specimen MB.C.25468; × 2.5. (d) Specimen MB.C.25469; × 2.5. (e–g), ontogenetic development of the conch width index (ww / dm), umbilical width index (uw / dm), and WER of the sectioned specimens and type material." figureDoi="http://doi.org/10.5281/zenodo.11585639" httpUri="https://zenodo.org/record/11585639/files/figure.png" pageId="7" pageNumber="88">7</figureCitation>
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)
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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||
<subSubSection id="C3216523FC5BFFABFFA9FBF8FD80FB77" pageId="7" pageNumber="88" type="reference_group">
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<paragraph id="8B8436A8FC5BFFABFFA9FBF8FF7FFBD0" blockId="7.[124,767,1037,1251]" pageId="7" pageNumber="88">
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1909
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<taxonomicName id="4C3B4D2BFC5BFFABFF6CFBF8FE12FBB1" authorityName="Girty" authorityYear="1909" box="[185,475,1037,1061]" class="Cephalopoda" family="Girtyoceratidae" genus="Adelphoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
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<emphasis id="B94FEABAFC5BFFABFF6CFBF8FE12FBB1" box="[185,475,1037,1061]" italics="true" pageId="7" pageNumber="88">Adelphoceras meslerianum</emphasis>
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</taxonomicName>
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. – Girty, p. 66, pl. 12, figs. 1–3c.
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</paragraph>
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<paragraph id="8B8436A8FC5BFFABFFA9FBB8FD60FBF0" blockId="7.[124,767,1037,1251]" box="[124,681,1100,1124]" pageId="7" pageNumber="88">
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1918
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<taxonomicName id="4C3B4D2BFC5BFFABFF6DFBB9FE0FFBF0" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[184,454,1100,1124]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
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<emphasis id="B94FEABAFC5BFFABFF6DFBB9FE0FFBF0" box="[184,454,1100,1124]" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
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</taxonomicName>
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. – Wedekind, p. 140.
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</paragraph>
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<paragraph id="8B8436A8FC5BFFABFFA9FB98FEADFB30" blockId="7.[124,767,1037,1251]" pageId="7" pageNumber="88">
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1964
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<taxonomicName id="4C3B4D2BFC5BFFABFF6AFB99FE1DFB10" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[191,468,1132,1156]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
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<emphasis id="B94FEABAFC5BFFABFF6AFB99FE1DFB10" box="[191,468,1132,1156]" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
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</taxonomicName>
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. – McCaleb et al., p. 13 (part), pl. 1, figs. 4–6.
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</paragraph>
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<paragraph id="8B8436A8FC5BFFABFFA9FB58FD80FB77" blockId="7.[124,767,1037,1251]" pageId="7" pageNumber="88">
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1965
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<taxonomicName id="4C3B4D2BFC5BFFABFF6AFB59FE1CFB50" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[191,469,1196,1220]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
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<emphasis id="B94FEABAFC5BFFABFF6AFB59FE1CFB50" box="[191,469,1196,1220]" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
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</taxonomicName>
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. – Gordon (part), pl. 24, Figs. 17–22, 30–32, text-figs. 63A, B, 64D.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3216523FC5BFFABFFA9FAF9FD48F996" pageId="7" pageNumber="88" type="materials_examined">
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<paragraph id="8B8436A8FC5BFFABFFA9FAF9FE41FAD7" blockId="7.[124,767,1292,1921]" pageId="7" pageNumber="88">
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<materialsCitation id="3B533CF5FC5BFFABFFA9FAF9FE41FAD7" ID-GBIF-Occurrence="4876197310" collectionCode="USNM" pageId="7" pageNumber="88" specimenCode="USNM 119594" specimenCount="1" typeStatus="holotype">
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<typeStatus id="5480880AFC5BFFABFFA9FAF9FF2AFAB7" box="[124,227,1292,1315]" pageId="7" pageNumber="88" type="holotype">Holotype</typeStatus>
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: Specimen
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<specimenCode id="DB9D9ED3FC5BFFABFEBCFAF9FDDFFAB7" box="[361,534,1292,1315]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="7" pageNumber="88" type="Museum">USNM 119594</specimenCode>
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; illustrated by
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<bibRefCitation id="EFAA4B59FC5BFFABFD13FAF9FF74FAD7" author="Girty, G. H." pageId="7" pageNumber="88" pagination="1 - 106" refId="ref16650" refString="Girty, G. H.: The fauna of the Caney Shale of Oklahoma, Bulletin of the U. S. Geological Survey, 377, 1 - 106, 1909." type="journal article" year="1909">Girty (1909</bibRefCitation>
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, pl. 12, figs. 1–1c).
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</materialsCitation>
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</paragraph>
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<paragraph id="8B8436A8FC5BFFABFFA9FAB9FE97FA57" blockId="7.[124,767,1292,1921]" pageId="7" pageNumber="88">
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Type locality and horizon:
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<collectionCode id="ED2AAE6DFC5BFFABFE4CFAB9FE14FAF7" box="[409,477,1356,1379]" country="USA" httpUri="http://grbio.org/cool/3n47-ewde" name="U.S. Geological Survey" pageId="7" pageNumber="88">USGS</collectionCode>
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locality 2083, Sec. 14,
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<collectionCode id="ED2AAE6DFC5BFFABFD03FAB9FD21FAF7" box="[726,744,1356,1379]" name="Tavera, Department of Geology and Geophysics" pageId="7" pageNumber="88">T</collectionCode>
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. 2 S.,
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<collectionCode id="ED2AAE6DFC5BFFABFF4BFA99FF7AFA17" box="[158,179,1388,1411]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="7" pageNumber="88">R</collectionCode>
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. 7 E., northwest of Wapanucka, Johnston County,
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<collectingRegion id="49FFF84AFC5BFFABFD17FA99FF73FA37" country="United States of America" name="Oklahoma" pageId="7" pageNumber="88">Oklahoma</collectingRegion>
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;
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<collectingRegion id="49FFF84AFC5BFFABFF13FA79FEE2FA37" box="[198,299,1420,1443]" country="United States of America" name="Delaware" pageId="7" pageNumber="88">Delaware</collectingRegion>
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Creek Member of Caney Shale,
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<taxonomicName id="4C3B4D2BFC5BFFABFD45FA7EFE97FA57" authority="Biozone." authorityName="Biozone." class="Cephalopoda" family="Goniatitidae" genus="Goniatites" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="multiliratus">
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<emphasis id="B94FEABAFC5BFFABFD45FA7EFF31FA57" italics="true" pageId="7" pageNumber="88">Goniatites multiliratus</emphasis>
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Biozone.
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</taxonomicName>
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</paragraph>
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<paragraph id="8B8436A8FC5BFFABFFA9FA3EFD48F996" blockId="7.[124,767,1292,1921]" pageId="7" pageNumber="88">
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||
<materialsCitation id="3B533CF5FC5BFFABFFA9FA3EFDB5F996" ID-GBIF-Occurrence="4876197312" collectionCode="NPL" pageId="7" pageNumber="88" specimenCode="NPL 68364, NPL 68366" specimenCount="3" specimenCount-immature="3">
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Material:
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<specimenCount id="9D3DFD21FC5BFFABFF3DFA3EFE5FFA76" box="[232,406,1483,1506]" count="3" pageId="7" pageNumber="88" type="immature">Three immature</specimenCount>
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specimens (
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<specimenCode id="DB9D9ED3FC5BFFABFDF4FA3EFD68FA76" box="[545,673,1483,1506]" collectionCode="NPL" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL 68364</specimenCode>
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||
through
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<specimenCode id="DB9D9ED3FC5BFFABFFA9FA1EFF30F996" box="[124,249,1515,1538]" collectionCode="NPL" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL 68366</specimenCode>
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) from bed 25 (sample 00TXCU-25)
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</materialsCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3216523FC5BFFABFFA9F9FEFB91FF73" pageId="7" pageNumber="88" type="diagnosis">
|
||
<paragraph id="8B8436A8FC5BFFABFFA9F9FEFB91FF73" blockId="7.[124,767,1292,1921]" lastBlockId="7.[819,1463,176,1921]" pageId="7" pageNumber="88">
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Diagnosis: Species of
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<taxonomicName id="4C3B4D2BFC5BFFABFEA5F9FEFE26F9B7" authorityName="Wedekind" authorityYear="1918" box="[368,495,1547,1571]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="genus">
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<emphasis id="B94FEABAFC5BFFABFEA5F9FEFE26F9B7" box="[368,495,1547,1571]" italics="true" pageId="7" pageNumber="88">Girtyoceras</emphasis>
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</taxonomicName>
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with a thickly discoidal, widely umbilicate conch at
|
||
<quantity id="4CC39B4DFC5BFFABFE64F9DEFDCFF9D6" box="[433,518,1579,1602]" metricMagnitude="-3" metricUnit="m" metricValue="7.0" metricValueMax="8.0" metricValueMin="6.0" pageId="7" pageNumber="88" unit="mm" value="7.0" valueMax="8.0" valueMin="6.0">6–8 mm</quantity>
|
||
diameter (ww / dm = 0.50–0.60; uw / dm = 0.45–0.55), and a thinly discoidal, narrowly umbilicate conch at
|
||
<quantity id="4CC39B4DFC5BFFABFE16F99EFDC2F916" box="[451,523,1643,1666]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="7" pageNumber="88" unit="mm" value="20.0">20 mm</quantity>
|
||
diameter (ww / dm = 0.45; uw / dm = 0.20). Whorl cross section strongly depressed in juveniles (
|
||
<quantity id="4CC39B4DFC5BFFABFEBEF95EFE6FF956" box="[363,422,1707,1730]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" pageId="7" pageNumber="88" unit="mm" value="5.0">5 mm</quantity>
|
||
diameter) with rounded trapezoidal whorl cross section, followed by an intermediate stage with rounded venter and angular umbilical margin (above
|
||
<quantity id="4CC39B4DFC5BFFABFFA9F8FFFF7EF8B5" box="[124,183,1802,1825]" metricMagnitude="-3" metricUnit="m" metricValue="7.0" pageId="7" pageNumber="88" unit="mm" value="7.0">7 mm</quantity>
|
||
diameter), and a discoidal stage (above
|
||
<quantity id="4CC39B4DFC5BFFABFDB0F8FFFD64F8B5" box="[613,685,1802,1825]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="7" pageNumber="88" unit="mm" value="20.0">20 mm</quantity>
|
||
diameter) with acute venter. Ornament with sharp riblets in the juvenile stage; coarse prorsiradiate growth lines with concavo-convex course in the intermediate stage and fine biconvex growth lines in the adult stage. Strong shell constrictions in intermediate growth stages.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C3216523FC5BFFABFCE6FF05FB8BFC31" pageId="7" pageNumber="88" type="description">
|
||
<paragraph id="8B8436A8FC5BFFABFCE6FF05FA45FE52" blockId="7.[819,1463,176,1921]" pageId="7" pageNumber="88">
|
||
Description: The
|
||
<specimenCount id="9D3DFD21FC5BFFABFC25FF05FB54FE93" box="[1008,1181,240,263]" count="3" pageId="7" pageNumber="88" type="generic">three specimens</specimenCount>
|
||
are all mostly testiferous. No sutures are visible. The specimen that represents the largest diameter (
|
||
<collectionCode id="ED2AAE6DFC5BFFABFC3BFEC5FBEBFED3" box="[1006,1058,304,327]" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL</collectionCode>
|
||
68366) is only a whorl fragment and poorly preserved. However, it represents a specimen that is clearly advanced over
|
||
<collectionCode id="ED2AAE6DFC5BFFABFBF6FE85FB9CFE13" box="[1059,1109,368,391]" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL</collectionCode>
|
||
68364 (at least
|
||
<quantity id="4CC39B4DFC5BFFABFAD4FE85FA80FE13" box="[1281,1353,368,391]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="7" pageNumber="88" unit="mm" value="12.0">12 mm</quantity>
|
||
in diameter) and shows the prominent tongue-shaped salient formed in the ribs and constrictions that are typical of this stage.
|
||
</paragraph>
|
||
<paragraph id="8B8436A8FC5BFFABFC9BFE3AFA7EFD51" blockId="7.[819,1463,176,1921]" pageId="7" pageNumber="88">
|
||
The better preserved of the two larger specimens (
|
||
<collectionCode id="ED2AAE6DFC5BFFABFA57FE3AFA7FFE72" box="[1410,1462,463,486]" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL</collectionCode>
|
||
68364) is nearly
|
||
<quantity id="4CC39B4DFC5BFFABFC25FE1AFBF1FD92" box="[1008,1080,495,518]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="7" pageNumber="88" unit="mm" value="10.0">10 mm</quantity>
|
||
in diameter (
|
||
<figureCitation id="13002A2DFC5BFFABFB1AFE1AFADDFD92" box="[1231,1300,495,518]" captionStart="Figure 6" captionStartId="7.[124,191,513,535]" captionTargetBox="[214,677,181,479]" captionTargetId="figure-15@7.[210,680,177,482]" captionTargetPageId="7" captionText="Figure 6. Girtyoceras meslerianum (Girty, 1909) from the Figure 2 Ranch section, Sierra Diablo. Specimen NPL 68364 from bed 17 (sample 00TXCU-25); × 4.0." figureDoi="http://doi.org/10.5281/zenodo.11585637" httpUri="https://zenodo.org/record/11585637/files/figure.png" pageId="7" pageNumber="88">Fig. 6</figureCitation>
|
||
). By
|
||
<quantity id="4CC39B4DFC5BFFABFA81FE1AFA47FD92" box="[1364,1422,495,518]" metricMagnitude="-3" metricUnit="m" metricValue="8.0" pageId="7" pageNumber="88" unit="mm" value="8.0">8 mm</quantity>
|
||
diameter the umbilical margin forms a strong right angle and the ribs and constrictions (which number four per whorl, are moderately deep and visible on both the internal moulds and external shell) are very strongly deflected anteriorly. The ribs and constrictions also form a distinct ventral sulcus at this stage. Faint longitudinal lines can be seen in the ventral area.
|
||
</paragraph>
|
||
<paragraph id="8B8436A8FC5BFFABFC9BFD3BFB8BFC31" blockId="7.[819,1463,176,1921]" pageId="7" pageNumber="88">
|
||
The smallest specimen (
|
||
<collectionCode id="ED2AAE6DFC5BFFABFB9AFD3BFB4AFD71" box="[1103,1155,718,741]" country="USA" httpUri="http://grbio.org/cool/q79f-q0gz" name="University of Texas at Austin" pageId="7" pageNumber="88" type="University or college">NPL</collectionCode>
|
||
68365) is transitioning from the widely umbilicate acutely marginated form to the almost parallel-sided thickly discoidal form with a 90
|
||
<superScript id="7C4E9BE0FC5BFFABFAA0FCFBFAB6FC8E" attach="left" box="[1397,1407,782,794]" fontSize="8" pageId="7" pageNumber="88">◦</superScript>
|
||
umbilical shoulder. The flanks and venter are gently rounded. Fine thread-like riblets originate from the umbilical margin and deflect anteriorly at the ventrolateral margin. The ribs are straight across the venter.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C3216523FC5BFFA5FCE6FC58FD37FD5E" lastPageId="9" lastPageNumber="90" pageId="7" pageNumber="88" type="discussion">
|
||
<paragraph id="8B8436A8FC5BFFABFCE6FC58FAEBF9F6" blockId="7.[819,1463,176,1921]" pageId="7" pageNumber="88">
|
||
Discussion:
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFC6DFC58FB00FC51" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[952,1225,941,965]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
|
||
<emphasis id="B94FEABAFC5BFFABFC6DFC58FB00FC51" box="[952,1225,941,965]" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
|
||
</taxonomicName>
|
||
is a rare taxon in the Sierra Diablo sections mostly because well-preserved three-dimensional material is difficult to obtain from the concretions that bear its assemblage. Although interpreted rather broadly in the past, in our view,
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB56FBD8FAE5FBD1" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[1155,1324,1069,1093]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
|
||
<emphasis id="B94FEABAFC5BFFABFB56FBD8FAE5FBD1" box="[1155,1324,1069,1093]" italics="true" pageId="7" pageNumber="88">G. meslerianum</emphasis>
|
||
</taxonomicName>
|
||
is a morphological intermediate between
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFBBBFBB9FAD4FBF0" authorityName="Korn and Titus" authorityYear="2011" box="[1134,1309,1100,1124]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="hamiltonense">
|
||
<emphasis id="B94FEABAFC5BFFABFBBBFBB9FAD4FBF0" box="[1134,1309,1100,1124]" italics="true" pageId="7" pageNumber="88">G. hamiltonense</emphasis>
|
||
</taxonomicName>
|
||
and the stratigraphically younger taxon
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB98FB99FA95FB10" baseAuthorityName="Miller and Faber" baseAuthorityYear="1892" box="[1101,1372,1132,1156]" class="Cephalopoda" family="Girtyoceratidae" genus="Sulcogirtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="limatum">
|
||
<emphasis id="B94FEABAFC5BFFABFB98FB99FA95FB10" box="[1101,1372,1132,1156]" italics="true" pageId="7" pageNumber="88">Sulcogirtyoceras limatum</emphasis>
|
||
</taxonomicName>
|
||
. It bears the more compressed conch form, strongly developed anterior deflection of the ribs and constrictions on the ventrolateral shoulder, and wider umbilicus of the latter (uw / dm = 0.31), but has the weaker ornament and lack of ventrolateral sulcus of the former. Thus
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB76FAF9FA87FAB0" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[1187,1358,1292,1316]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
|
||
<emphasis id="B94FEABAFC5BFFABFB76FAF9FA87FAB0" box="[1187,1358,1292,1316]" italics="true" pageId="7" pageNumber="88">G. meslerianum</emphasis>
|
||
</taxonomicName>
|
||
might be confused with
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFC18FAD9FBB2FAD0" authorityName="Korn and Titus" authorityYear="2011" box="[973,1147,1324,1348]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="hamiltonense">
|
||
<emphasis id="B94FEABAFC5BFFABFC18FAD9FBB2FAD0" box="[973,1147,1324,1348]" italics="true" pageId="7" pageNumber="88">G. hamiltonense</emphasis>
|
||
</taxonomicName>
|
||
and small specimens (smaller than
|
||
<quantity id="4CC39B4DFC5BFFABFCB2FAB9FC78FAF7" box="[871,945,1356,1379]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="7" pageNumber="88" unit="mm" value="12.0">12 mm</quantity>
|
||
) of
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFC0FFABEFB82FAF7" baseAuthorityName="Miller and Faber" baseAuthorityYear="1892" box="[986,1099,1355,1379]" class="Cephalopoda" family="Girtyoceratidae" genus="Sulcogirtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="limatum">
|
||
<emphasis id="B94FEABAFC5BFFABFC0FFABEFB82FAF7" box="[986,1099,1355,1379]" italics="true" pageId="7" pageNumber="88">S. limatum</emphasis>
|
||
</taxonomicName>
|
||
. However,
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB16FABEFAA5FAF7" baseAuthorityName="Girty" baseAuthorityYear="1909" box="[1219,1388,1355,1379]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
|
||
<emphasis id="B94FEABAFC5BFFABFB16FABEFAA5FAF7" box="[1219,1388,1355,1379]" italics="true" pageId="7" pageNumber="88">G. meslerianum</emphasis>
|
||
</taxonomicName>
|
||
can be readily differentiated from
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB82FA9EFACEFA17" authorityName="Korn and Titus" authorityYear="2011" box="[1111,1287,1387,1411]" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="hamiltonense">
|
||
<emphasis id="B94FEABAFC5BFFABFB82FA9EFACEFA17" box="[1111,1287,1387,1411]" italics="true" pageId="7" pageNumber="88">G. hamiltonense</emphasis>
|
||
</taxonomicName>
|
||
because the latter has a consistently narrower umbilicus (uw / dm = 0.25 at
|
||
<quantity id="4CC39B4DFC5BFFABFC85FA59FC51FA57" box="[848,920,1452,1475]" metricMagnitude="-2" metricUnit="m" metricValue="1.6" pageId="7" pageNumber="88" unit="mm" value="16.0">16 mm</quantity>
|
||
diameter). Early members of the genus
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFA81FA5EFC44FA77" baseAuthorityName="Ruzhencev" baseAuthorityYear="1960" class="Cephalopoda" family="Girtyoceratidae" genus="Sulcogirtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B94FEABAFC5BFFABFA81FA5EFC44FA77" italics="true" pageId="7" pageNumber="88">Sulcogirtyoceras</emphasis>
|
||
</taxonomicName>
|
||
develop a prominent ventrolateral sulcus at approximately
|
||
<quantity id="4CC39B4DFC5BFFABFC59FA1EFC35F996" box="[908,1020,1515,1538]" metricMagnitude="-2" metricUnit="m" metricValue="1.35" metricValueMax="1.5" metricValueMin="1.2" pageId="7" pageNumber="88" unit="mm" value="13.5" valueMax="15.0" valueMin="12.0">12–15 mm</quantity>
|
||
diameter, but also have slightly stronger ribs and constrictions at comparable stages (less than
|
||
<quantity id="4CC39B4DFC5BFFABFABBF9FEFA7FF9B6" box="[1390,1462,1547,1570]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="7" pageNumber="88" unit="mm" value="20.0">20 mm</quantity>
|
||
diameter). Smaller specimens of more advanced species of
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFCE6F9BFFC2FF9F6" baseAuthorityName="Ruzhencev" baseAuthorityYear="1960" box="[819,998,1610,1634]" class="Cephalopoda" family="Girtyoceratidae" genus="Sulcogirtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B94FEABAFC5BFFABFCE6F9BFFC2FF9F6" box="[819,998,1610,1634]" italics="true" pageId="7" pageNumber="88">Sulcogirtyoceras</emphasis>
|
||
</taxonomicName>
|
||
have more depressed whorls.
|
||
</paragraph>
|
||
<paragraph id="8B8436A8FC5BFFA5FC9BF99EFD37FD5E" blockId="7.[819,1463,176,1921]" lastBlockId="9.[124,767,499,714]" lastPageId="9" lastPageNumber="90" pageId="7" pageNumber="88">
|
||
Species that are stratigraphically older than
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFAEDF99FFCA6F936" authorityName="Korn and Titus" authorityYear="2011" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="hamiltonense">
|
||
<emphasis id="B94FEABAFC5BFFABFAEDF99FFCA6F936" italics="true" pageId="7" pageNumber="88">G. hamiltonense</emphasis>
|
||
</taxonomicName>
|
||
in North America have less sinuous constrictions and narrower umbilici at comparable diameters (e.g.
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFAB4F95FFCABF976" authorityName="Korn and Titus" authorityYear="2011" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="gordoni">
|
||
<emphasis id="B94FEABAFC5BFFABFAB4F95FFCABF976" italics="true" pageId="7" pageNumber="88">G. gordoni</emphasis>
|
||
</taxonomicName>
|
||
), while younger Serpukhovian species (e.g.
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFAE2F93FFC36F895" authority="Gordon" authorityName="Gordon" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="jasperense">
|
||
<emphasis id="B94FEABAFC5BFFABFAE2F93FFC6DF896" italics="true" pageId="7" pageNumber="88">Girtyoceras jasperense</emphasis>
|
||
Gordon
|
||
</taxonomicName>
|
||
) are more narrowly umbilicate and more robust (higher-value ww / wh ratios).
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB00F8FFFCA7F8D6" baseAuthorityName="Girty" baseAuthorityYear="1909" class="Cephalopoda" family="Girtyoceratidae" genus="Girtyoceras" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="meslerianum">
|
||
<emphasis id="B94FEABAFC5BFFABFB00F8FFFCA7F8D6" italics="true" pageId="7" pageNumber="88">Girtyoceras meslerianum</emphasis>
|
||
</taxonomicName>
|
||
appears to be limited to the
|
||
<taxonomicName id="4C3B4D2BFC5BFFABFB15F8DFFC45F8F5" authority="Biozone" authorityName="Biozone" class="Cephalopoda" family="Goniatitidae" genus="Goniatites" kingdom="Animalia" pageId="7" pageNumber="88" phylum="Mollusca" rank="species" species="multiliratus">
|
||
<emphasis id="B94FEABAFC5BFFABFB15F8DFFA7FF8D6" box="[1216,1462,1834,1858]" italics="true" pageId="7" pageNumber="88">Goniatites multiliratus</emphasis>
|
||
Biozone
|
||
</taxonomicName>
|
||
in both the mid-continent
|
||
<collectingCountry id="F32C7638FC5BFFABFB16F8BFFB31F8F5" box="[1219,1272,1866,1889]" name="United States of America" pageId="7" pageNumber="88">USA</collectingCountry>
|
||
and the western Cordillera (Chainman Shale). It is rather uncommon outside of its
|
||
<typeStatus id="5480880AFC55FFA5FF6AFE06FF24FD9E" box="[191,237,499,522]" pageId="9" pageNumber="90">type</typeStatus>
|
||
area, with the only other definitive occurrences we know of at San
|
||
<collectingCountry id="F32C7638FC55FFA5FE8DFDE6FE47FDBE" box="[344,398,531,554]" name="Bonaire, Sint Eustatius and Saba" pageId="9" pageNumber="90">Saba</collectingCountry>
|
||
, Texas in the base of the Barnett Formation and in the Chainman Shale at the classic Duckwater locality (not mentioned by
|
||
<bibRefCitation id="EFAA4B59FC55FFA5FE3EFDA6FD10FDFE" author="Korn, D. & Titus, A. L." box="[491,729,595,618]" pageId="9" pageNumber="90" pagination="107 - 196" refId="ref17423" refString="Korn, D. and Titus, A. L.: Goniatites Zone (middle Mississippian) ammonoids of the Antler Foreland Basin (Nevada, Utah), Bull. Geosci., 86, 107 - 196, doi: 10.3140 / bull. geosci. 1242, 2011." type="journal article" year="2011">Korn and Titus, 2011</bibRefCitation>
|
||
). It should occur in the
|
||
<taxonomicName id="4C3B4D2BFC55FFA5FE89FD87FD7DFD1E" authority="Biozone" authorityName="Biozone" box="[348,692,626,650]" class="Cephalopoda" family="Goniatitidae" genus="Goniatites" kingdom="Animalia" pageId="9" pageNumber="90" phylum="Mollusca" rank="species" species="multiliratus">
|
||
<emphasis id="B94FEABAFC55FFA5FE89FD87FD98FD1E" box="[348,593,626,650]" italics="true" pageId="9" pageNumber="90">Goniatites multiliratus</emphasis>
|
||
Biozone
|
||
</taxonomicName>
|
||
of the upper Pool Creek Member of the Moorefield Formation, but specimens from this interval are all crushed (
|
||
<bibRefCitation id="EFAA4B59FC55FFA5FD8CFD46FD3BFD5E" author="Gordon, M. J." box="[601,754,691,714]" pageId="9" pageNumber="90" pagination="1 - 322" refId="ref16774" refString="Gordon, M. J.: Carboniferous Cephalopods of Arkansas, Professional Papers, U. S. Geological Survey, 460, 1 - 322, 1965." type="journal article" year="1965">Gordon, 1965</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |