171 lines
21 KiB
XML
171 lines
21 KiB
XML
<document id="F22CE4CCB4376B62B94568E7CF44DEFE" ID-CLB-Dataset="107849" ID-DOI="10.5252/geodiversitas2022v44a25" ID-GBIF-Dataset="d0184974-bea3-4f97-a2f8-98887ec4f87e" ID-ISSN="1638-9395" ID-Zenodo-Dep="6902033" ID-ZooBank="urn:lsid:zoobank.org:pub:EA12DCB7-A5BE-4763-B805-25087EBD726D" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1658759598753" checkinUser="felipe" docAuthor="Allain, Ronan, Vullo, Romain, Rozada, Lee, Anquetin, Jérémy, Bourgeais, Renaud, Goedert, Jean, Lasseron, Maxime, Martin, Jeremy E., Pérez-García, Adán, Fabrègues, Claire Peyre De, Royo-Torres, Rafael, Augier, Dominique & Bailly, Gilles" docDate="2022" docId="03C887B9FF99FFC4745CA30FFCEDF93C" docLanguage="en" docName="Geodiversitas.44.25.683-752.pdf.imf" docOrigin="Geodiversitas 44 (25)" docStyle="DocumentStyle:F830B10FF475E64C1F1601E3B32DDC00.4:Geodiversitas.2018-.journal_article" docStyleId="F830B10FF475E64C1F1601E3B32DDC00" docStyleName="Geodiversitas.2018-.journal_article" docStyleVersion="4" docTitle="Gobiconodon Trofimov 1978" docType="treatment" docVersion="7" lastPageNumber="728" masterDocId="FFF1FFC1FFB6FFEB753AA238FFEBFFB1" masterDocTitle="Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J / K boundary" masterLastPageNumber="752" masterPageNumber="683" pageNumber="728" updateTime="1699361923064" updateUser="ExternalLinkService" zenodo-license-document="CC0-1.0" zenodo-license-figures="CC0-1.0">
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<mods:title id="36200DC4A673646044A3FEA75FB14BAD">Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J / K boundary</mods:title>
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<mods:namePart id="847079505B11732B1FF405A76DAA32F3">Allain, Ronan</mods:namePart>
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<mods:namePart id="C7FF5CADFEAB03E1163ADEEAB6B7B6DE">Vullo, Romain</mods:namePart>
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<mods:namePart id="E2412600E45E2E8F64A2D5CE31EAE258">Martin, Jeremy E.</mods:namePart>
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<mods:namePart id="7EB842D93918FE35D18A0EBE35881FAF">Fabrègues, Claire Peyre De</mods:namePart>
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<mods:namePart id="1EAF58816C04781E40B3FB79C9EFA8D2">Royo-Torres, Rafael</mods:namePart>
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<mods:title id="7334107B8175FEA320140CEF515B816E">Geodiversitas</mods:title>
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<mods:date id="4343E049EA145CDD82C966471136FF15">2022</mods:date>
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<mods:number id="D250B843A874AF2B2AFB1ABBF70DC246">2022-07-21</mods:number>
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<mods:number id="50F3E1B422CE35D72FFC7068A072D678">44</mods:number>
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<mods:identifier id="7E6AB8317863BC4292244C9C9F88DE77" type="DOI">10.5252/geodiversitas2022v44a25</mods:identifier>
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<treatment id="03C887B9FF99FFC4745CA30FFCEDF93C" ID-DOI="http://doi.org/10.5281/zenodo.6928938" ID-GBIF-Taxon="197866770" ID-Zenodo-Dep="6928938" LSID="urn:lsid:plazi:treatment:03C887B9FF99FFC4745CA30FFCEDF93C" httpUri="http://treatment.plazi.org/id/03C887B9FF99FFC4745CA30FFCEDF93C" lastPageNumber="728" pageId="47" pageNumber="728">
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<subSubSection id="C37B6524FF99FFC4745CA30FFDCEFEE0" box="[358,549,311,337]" pageId="47" pageNumber="728" type="nomenclature">
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<paragraph id="8BDE36AFFF99FFC4745CA30FFDCEFEE0" blockId="47.[358,549,311,337]" box="[358,549,311,337]" pageId="47" pageNumber="728">
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<heading id="D09681C3FF99FFC4745CA30FFDCEFEE0" box="[358,549,311,337]" centered="true" fontSize="11" level="2" pageId="47" pageNumber="728" reason="2">
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<taxonomicName id="4C614D2CFF99FFC4745CA30FFE1FFEE0" authorityName="Trofimov" authorityYear="1978" box="[358,500,311,337]" class="Mammalia" family="Amphilestidae" genus="Gobiconodon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Eutriconodonta" pageId="47" pageNumber="728" phylum="Chordata" rank="genus">
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<emphasis id="B915EABDFF99FFC4745CA30FFE1FFEE0" box="[358,500,311,337]" italics="true" pageId="47" pageNumber="728">Gobiconodon</emphasis>
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</taxonomicName>
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? sp.
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C37B6524FF99FFC47441A36FFCEDF93C" pageId="47" pageNumber="728" type="description">
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<paragraph id="8BDE36AFFF99FFC47441A36FFDFBFEC0" blockId="47.[379,528,343,369]" box="[379,528,343,369]" pageId="47" pageNumber="728">
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(
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<figureCitation id="135A2A2AFF99FFC474BFA36FFDECFEC0" box="[389,519,343,369]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32A, B</figureCitation>
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)
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</paragraph>
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<paragraph id="8BDE36AFFF99FFC475BEA3AFFEFEFE00" blockId="47.[131,776,407,1677]" box="[132,277,407,433]" pageId="47" pageNumber="728">DESCRIPTION</paragraph>
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<paragraph id="8BDE36AFFF99FFC475BEA38EFCEDF93C" blockId="47.[131,776,407,1677]" pageId="47" pageNumber="728">
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Within the eutriconodontan material from Angeac-Charente, the specimen ANG M-21 (
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<figureCitation id="135A2A2AFF99FFC47701A3EEFD28FE40" box="[571,707,470,497]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32A, B</figureCitation>
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) consists of an isolated tooth crown, the main central cusp a being surrounded by two unequal cusps b and c (see figures 4.7 and 7.2 by
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<bibRefCitation id="EFF04B5EFF99FFC47499A00EFCEDFDE1" author="Crompton & Jenkins" box="[419,774,565,592]" firstAuthor="Crompton" pageId="47" pageNumber="728" pagination="427 - 458" refId="ref38316" refString="CROMPTON A. W. & JENKINS F. A. 1968. - Molar occlusion in Late Triassic mammals. Biological Reviews 43 (4): 427 - 458. https: // doi. org / 10.1111 / j. 1469 - 185 x. 1968. tb 00966. x" type="journal article" year="1968">Crompton & Jenkins [1968]</bibRefCitation>
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and Kielan-Jaworowska
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<emphasis id="B915EABDFF99FFC474A6A06FFE3FFDC1" box="[412,468,598,624]" italics="true" pageId="47" pageNumber="728">et al.</emphasis>
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[2004] respectively for an explanation of the cusp-numbering system). The root is missing but the tooth was probably uniradiculate. The crown is labiolingually compressed and the lingual face appears almost planar in occlusal view, while the labial face is convex at its base (
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<figureCitation id="135A2A2AFF99FFC47481A0CDFDCCFCA1" box="[443,551,757,784]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32A</figureCitation>
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). There is no trace of either a labial or lingual cingulid. Cusp a dominates the crown and is triangular in lateral profile (
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<figureCitation id="135A2A2AFF99FFC477A8A10DFD12FCE1" box="[658,761,821,848]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32B</figureCitation>
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). Its mesial surface is rounded, but its distal edge shows a well-defined crest (
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<figureCitation id="135A2A2AFF99FFC47458A14DFE20FC3E" box="[354,459,885,911]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32A</figureCitation>
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). An oval wear facet can be observed on the labiodistal surface of cusp a (
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<figureCitation id="135A2A2AFF99FFC477A8A1ADFD10FC1E" box="[658,763,917,943]" captionStart="FIG" captionStartId="46.[132,143,1963,1980]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-21@46.[132,1455,215,1878]" captionTargetPageId="46" captionText="FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm." figureDoi="http://doi.org/10.5281/zenodo.6902113" httpUri="https://zenodo.org/record/6902113/files/figure.png" pageId="47" pageNumber="728">Fig. 32A</figureCitation>
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). Cups b is smaller than cusp c; it is also placed higher relatively to cusp a and less separated from it than cusp c. The apex of cusp c appears to be slightly flexed labially. Both cusps b and c bear small labially oriented wear facets. The presence of a probably single root indicates a tooth from the anterior dentition, but the well-developed accessory cusps show that it is a distal premolar and not a more mesial tooth. Among Laurasian Early Cretaceous mammals, single-rooted distal premolars are only seen within the
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<taxonomicName id="4C614D2CFF99FFC4743EA6ECFE37FB5F" authorityName="Chow & Rich" authorityYear="1984" box="[260,476,1236,1262]" class="Mammalia" family="Gobiconodontidae" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="47" pageNumber="728" phylum="Chordata" rank="family">Gobiconodontidae</taxonomicName>
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family (
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<bibRefCitation id="EFF04B5EFF99FFC47704A6ECFD1DFB5F" author="SWEETMAN S. C." box="[574,758,1236,1262]" journalOrPublisher="Palaeontology" pageId="47" pageNumber="728" pagination="889 - 897" part="49" refId="ref49589" refString="SWEETMAN S. C. 2006. - A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain. Palaeontology 49 (4): 889 - 897. http: // doi. org / 10.1111 / j. 1475 - 4983.2006.00564. x" title="A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain" type="journal article" year="2006">Sweetman 2006</bibRefCitation>
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). Moreover, the specimen ANG M-21 closely resembles the gobiconodontid distal premolar (possibly right p4) described by
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<bibRefCitation id="EFF04B5EFF99FFC4741BA70BFE00FAFF" author="SWEETMAN S. C." box="[289,491,1331,1358]" journalOrPublisher="Palaeontology" pageId="47" pageNumber="728" pagination="889 - 897" part="49" refId="ref49589" refString="SWEETMAN S. C. 2006. - A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain. Palaeontology 49 (4): 889 - 897. http: // doi. org / 10.1111 / j. 1475 - 4983.2006.00564. x" title="A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain" type="journal article" year="2006">Sweetman (2006)</bibRefCitation>
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in the Early Cretaceous Wessex Formation of the
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<collectingRegion id="49A5F84DFF99FFC474A4A76BFDDAFADC" box="[414,561,1363,1389]" country="United Kingdom" name="Isle of Wight" pageId="47" pageNumber="728">Isle of Wight</collectingRegion>
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, southern
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<collectingCountry id="F376763FFF99FFC4779EA76BFCEEFADC" box="[676,773,1363,1389]" name="United Kingdom" pageId="47" pageNumber="728">England</collectingCountry>
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, and tentatively referred to
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<taxonomicName id="4C614D2CFF99FFC47492A74BFDDDFA3C" authorityName="Trofimov" authorityYear="1978" box="[424,566,1395,1421]" class="Mammalia" family="Amphilestidae" genus="Gobiconodon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Eutriconodonta" pageId="47" pageNumber="728" phylum="Chordata" rank="genus">
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<emphasis id="B915EABDFF99FFC47492A74BFDDDFA3C" box="[424,566,1395,1421]" italics="true" pageId="47" pageNumber="728">Gobiconodon</emphasis>
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</taxonomicName>
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. Considering this, and the general morphology of ANG M-21 (tricuspid tooth with mesiodistally aligned cusps; dominant cusp a and small but well-developed accessory cusps; labial inflation of the crown; lack of cingulid), the specimen is identified as a left distal premolar, probably a p3 (as the accessory cusps are less developed than in the possible p4 described by
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<bibRefCitation id="EFF04B5EFF99FFC47473A46AFDF8F9DC" author="SWEETMAN S. C." box="[329,531,1618,1645]" journalOrPublisher="Palaeontology" pageId="47" pageNumber="728" pagination="889 - 897" part="49" refId="ref49589" refString="SWEETMAN S. C. 2006. - A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain. Palaeontology 49 (4): 889 - 897. http: // doi. org / 10.1111 / j. 1475 - 4983.2006.00564. x" title="A gobiconodontid (Mammalia, Gobiconodontidae) from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern Britain" type="journal article" year="2006">Sweetman [2006]</bibRefCitation>
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), of a gobiconodontid mammal, and is tentatively referred to
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<taxonomicName id="4C614D2CFF99FFC47754A44AFD14F93D" authorityName="Trofimov" authorityYear="1978" box="[622,767,1650,1676]" class="Mammalia" family="Amphilestidae" genus="Gobiconodon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Eutriconodonta" pageId="47" pageNumber="728" phylum="Chordata" rank="genus">
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<emphasis id="B915EABDFF99FFC47754A44AFD14F93D" box="[622,767,1650,1676]" italics="true" pageId="47" pageNumber="728">Gobiconodon</emphasis>
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</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |