351 lines
42 KiB
XML
351 lines
42 KiB
XML
<document 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" approvalRequired="9" approvalRequired_for_taxonomicNames="9" 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="03C887B9FF97FFCA7455A0CEFA44F85D" docLanguage="en" docName="Geodiversitas.44.25.683-752.pdf.imf" docOrigin="Geodiversitas 44 (25)" docStyle="DocumentStyle:F830B10FF475E64C1F1601E3B32DDC00.3:Geodiversitas.2018-.journal_article" docStyleId="F830B10FF475E64C1F1601E3B32DDC00" docStyleName="Geodiversitas.2018-.journal_article" docStyleVersion="3" docTitle="Dacentrurus undetermined" docType="treatment" docVersion="5" lastPageNumber="714" 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="714" updateTime="1659036118613" updateUser="ExternalLinkService" zenodo-license-document="CC0-1.0" zenodo-license-figures="CC0-1.0">
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<mods:title>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>Allain, Ronan</mods:namePart>
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<mods:namePart>Vullo, Romain</mods:namePart>
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<mods:namePart>Rozada, Lee</mods:namePart>
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<mods:namePart>Anquetin, Jérémy</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Bourgeais, Renaud</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Goedert, Jean</mods:namePart>
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<mods:namePart>Lasseron, Maxime</mods:namePart>
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<mods:namePart>Martin, Jeremy E.</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Pérez-García, Adán</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Fabrègues, Claire Peyre De</mods:namePart>
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<mods:namePart>Royo-Torres, Rafael</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Augier, Dominique</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Bailly, Gilles</mods:namePart>
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<mods:title>Geodiversitas</mods:title>
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<mods:date>2022</mods:date>
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<mods:number>2022-07-21</mods:number>
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<mods:number>44</mods:number>
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<mods:number>25</mods:number>
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<mods:identifier type="DOI">10.5252/geodiversitas2022v44a25</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.6928915" ID-Zenodo-Dep="6928915" LSID="urn:lsid:plazi:treatment:03C887B9FF97FFCA7455A0CEFA44F85D" httpUri="http://treatment.plazi.org/id/03C887B9FF97FFCA7455A0CEFA44F85D" lastPageNumber="714" pageId="33" pageNumber="714">
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<subSubSection box="[367,540,758,784]" pageId="33" pageNumber="714" type="nomenclature">
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<paragraph blockId="33.[367,540,758,784]" box="[367,540,758,784]" pageId="33" pageNumber="714">
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<heading box="[367,540,758,784]" centered="true" fontSize="11" level="2" pageId="33" pageNumber="714" reason="2">
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<taxonomicName box="[367,540,758,784]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" kingdom="Animalia" order="Ornithischia" pageId="33" pageNumber="714" phylum="Chordata" rank="species" species="undetermined">
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<emphasis box="[367,501,758,783]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
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sp.
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</taxonomicName>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="33" pageNumber="714" type="description">
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<paragraph blockId="33.[384,523,789,816]" box="[384,523,789,816]" pageId="33" pageNumber="714">
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(
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<figureCitation box="[393,471,789,815]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23</figureCitation>
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D-J)
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</paragraph>
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<paragraph blockId="33.[131,777,854,2028]" box="[132,277,854,880]" pageId="33" pageNumber="714">DESCRIPTION</paragraph>
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<paragraph blockId="33.[131,777,854,2028]" pageId="33" pageNumber="714">
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Stegosaurs are represented at Angeac-Charente by 84 identified skeletal elements, most of which are vertebrae and ribs. Other remains include a few appendicular (phalanges) and skull (squamosal and braincase elements) bones, and one tooth (
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<figureCitation box="[262,341,1012,1039]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23</figureCitation>
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D-J). Except for the tooth, which was collected following washing and screening, all the other elements are from the same area (
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<figureCitation box="[469,531,1076,1102]" captionStart="FIG" captionStartId="7.[132,143,1940,1957]" captionTargetBox="[132,1424,215,1878]" captionTargetId="figure-15@7.[132,1455,215,1878]" captionTargetPageId="7" captionText="FIG. 3. — Spatial distribution of identified vertebrate bodyfossil remains of Angeac-Charente recovered from 2013 to 2018: A, aerial view of the Angeac-Charente site with the location of the manual (R1-3 and CG1-8) excavation plots and some remarkable fossils (drone picture ©D.Abit, July 2017); B, diagram of the Angeac- Charente locality with the position of vertebrate body fossil remains according to taxon type. Each point represents the position of one specimen (3-D SIG data measured from 2013 to 2018 projected with ArcGIS Desktop 10.3.1.). SIG data from the CG1 plot (2010-1012) are lacking (in grey) (See Rozada et al. 2021)." figureDoi="http://doi.org/10.5281/zenodo.6902041" httpUri="https://zenodo.org/record/6902041/files/figure.png" pageId="33" pageNumber="714">Fig. 3</figureCitation>
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[CG4 to CG7 plots]). They very likely belong to the same individual because none of the identified bones represent the same skeletal element. Moreover, the relative proportion of the bones is also consistent with their belonging to a single individual, as suggested by the reconstructed vertebral series (
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<figureCitation box="[648,723,1236,1262]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23</figureCitation>
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F-J).
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</paragraph>
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<paragraph blockId="33.[131,777,854,2028]" pageId="33" pageNumber="714">
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The single collected dentary tooth crown (
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<figureCitation box="[601,726,1267,1294]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23D, E</figureCitation>
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) has the same proportions as the stegosaur tooth from Chervesde-Cognac described by Billon-Bruyat
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<emphasis box="[565,618,1331,1357]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
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(2010). It has a preserved height of
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<quantity box="[376,466,1363,1390]" metricMagnitude="-3" metricUnit="m" metricValue="4.2" pageId="33" pageNumber="714" unit="mm" value="4.2">4.2 mm</quantity>
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and a maximum mesiodistal width basally of
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<quantity box="[356,428,1395,1422]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="33" pageNumber="714" unit="mm" value="4.0">4 mm</quantity>
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. The root is broken at its base. The presence of a sharp demarcation, either swelling or cingulum, almost at the same level on each crown surface together with the mesiodistal symmetry of the tooth lead us to refer this tooth to a stegosaurian (Billon-Bruyat
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<emphasis box="[723,775,1523,1549]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
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2010). Nevertheless, the morphology of the crown is quite distinct from that of other known stegosaur teeth. As in
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<taxonomicName authorityName="Dong Zhiming, Tang Zilu & Zhou" authorityYear="1982" box="[134,307,1619,1644]" class="Reptilia" family="Huayangosauridae" genus="Huayangosaurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
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<emphasis box="[134,307,1619,1644]" italics="true" pageId="33" pageNumber="714">Huayangosaurus</emphasis>
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</taxonomicName>
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, the base of the crown is sharply differentiated from the root by a prominent swelling, but there is no true ring-shaped cingulum as in other stegosaurs (
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<bibRefCitation author="SERENO P. C. & DONG Z." journalOrPublisher="Journal of Vertebrate Paleontology" pageId="33" pageNumber="714" pagination="318 - 343" part="12" publicationUrl="https://www.jstor.org/stable/4523456" refId="ref48973" refString="SERENO P. C. & DONG Z. 1992. - The skull of the basal stegosaur Huayangosaurus taibaii and a cladistic diagnosis of Stegosauria. Journal of Vertebrate Paleontology 12: 318 - 343. https: // www. jstor. org / stable / 4523456" title="The skull of the basal stegosaur Huayangosaurus taibaii and a cladistic diagnosis of Stegosauria" type="journal article" year="1992">Sereno & Dong 1992</bibRefCitation>
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). In labial view, a single rounded median protuberance is present, but there are no well-defined ridges. A broad, 45° angled wear surface is present above the bulbous crown base on the labial side and has truncated a part of the dentary crown, so that the denticles are no longer visible (
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<figureCitation box="[222,328,1873,1900]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23D</figureCitation>
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). Vertical coarse ridges, semicircular in cross section and divided by narrow grooves are visible in lingual view.
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</paragraph>
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<paragraph blockId="33.[131,777,854,2028]" lastBlockId="33.[811,1455,215,2028]" pageId="33" pageNumber="714">
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A dozen cervical vertebrae, including the axis as well as four dorsal and two caudal vertebrae have been collected (
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<figureCitation box="[898,980,215,241]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23</figureCitation>
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F-J). The neural arches are often broken, probably due to trampling (
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<bibRefCitation author="ROZADA L. & ALLAIN R. & VULLO R. & AUGIER D. & GOEDERT J. & JEAN A. & ROYO- TORRES R. & QVARNSTROM M. & PEYRE DE FABREGUES C. & MARCHAL J." box="[1155,1382,247,273]" journalOrPublisher="Lethaia" pageId="33" pageNumber="714" pagination="141 - 165" part="54" refId="ref48377" refString="ROZADA L., ALLAIN R., VULLO R., AUGIER D., GOEDERT J., JEAN A., ROYO- TORRES R., QVARNSTROM M., PEYRE DE FABREGUES C. & MARCHAL J. 2021. - A Lower Cretaceous Lagerstatte from Western Europe: taphonomical overview of the vertebrate assemblage of Angeac-Charente site (Western France). Lethaia 54: 141 - 165. https: // doi. org / 10.1111 / let. 12394" title="A Lower Cretaceous Lagerstatte from Western Europe: taphonomical overview of the vertebrate assemblage of Angeac-Charente site (Western France)" type="journal article" year="2021">
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Rozada
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<emphasis box="[1252,1311,247,273]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
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2021
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</bibRefCitation>
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), and numerous neural spines or transverse processes are found isolated. The axial skeleton shows some features permitting clarification of the phylogenetic position of the Angeac-Charente stegosaur. The transverse processes of dorsal vertebrae project at a high angle to the horizontal as in all Thyreophoroidea (
|
||
<figureCitation box="[1060,1152,438,465]" captionStart="FIG" captionStartId="34.[132,143,1917,1934]" captionTargetBox="[132,1455,215,1828]" captionTargetId="figure-29@34.[698,1267,783,1354]" captionTargetPageId="34" captionText="FIG. 23. — Thyreophoran remains from Angeac-Charente:A, B, ankylosaur maxillary tooth (ANG15-3980) in lingual (A) and labial (B) views; C, ankylosaur osteoderm (ANG18-6585) in dorsal view; D, E, dentary tooth of Dacentrurus sp. (ANG M-14) in labial (D) and lingual (E) views; F, axis of Dacentrurus sp. (ANG18-6203) in ventral view; G, anterior cervical vertebra of Dacentrurus sp. (ANG12-1878) in ventral view; H, reconstructed cervical series of Dacentrurus sp. (ANG16-6748, ANG16-4660, ANG12-1749, ANG14-3202, ANG14-2912, ANG14-3094) in ventral view; I, J, dorsal vertebra of Dacentrurus sp. (ANG18-6548) in anterior (I) and right lateral (J) views. Scale bars: A, B, 5 mm; C, D, 2.5 mm; E, 2.5 cm; F-J, 5 cm." figureDoi="http://doi.org/10.5281/zenodo.6902091" httpUri="https://zenodo.org/record/6902091/files/figure.png" pageId="33" pageNumber="714">Fig. 23I</figureCitation>
|
||
), and the prezygapophyses are fused on some dorsal vertebrae as in most Eurypoda. The dorsal centra are wider than long (ANG 15-3937, centrum witdh
|
||
<quantity box="[991,1088,534,561]" metricMagnitude="-1" metricUnit="m" metricValue="1.26" pageId="33" pageNumber="714" unit="mm" value="126.0">126 mm</quantity>
|
||
; centrum length
|
||
<quantity box="[1297,1384,534,561]" metricMagnitude="-2" metricUnit="m" metricValue="9.5" pageId="33" pageNumber="714" unit="mm" value="95.0">95 mm</quantity>
|
||
). This is a feature diagnostic of
|
||
<taxonomicName authorityName="Lucas" authorityYear="1902" box="[1087,1222,567,592]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1087,1222,567,592]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
</taxonomicName>
|
||
according to
|
||
<bibRefCitation author="Galton" firstAuthor="Galton" pageId="33" pageNumber="714" pagination="211 - 254" refId="ref40069" refString="GALTON P. M. 1985. - British plated dinosaurs (Ornithischia, Stegosauridae). Journal of Vertebrate Paleontology 5 (3): 211 - 254. https: // doi. org / 10.1080 / 02724634.1985.10011859" type="journal article" year="1985">Galton (1985)</bibRefCitation>
|
||
and
|
||
<bibRefCitation author="Maidment" box="[942,1205,598,624]" etAl="et al." firstAuthor="Maidment" pageId="33" pageNumber="714" pagination="367 - 407" refId="ref42813" refString="MAIDMENT S. C., NORMAN D. B., BARRETT P. M. & UPCHURCH P. 2008. - Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology 6: 367 - 407. https: // doi. org / 10.1017 / S 1477201908002459" type="journal article" year="2008">
|
||
Maidment
|
||
<emphasis box="[1068,1120,598,624]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
(2008)
|
||
</bibRefCitation>
|
||
, and of
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1293,1455,598,624]" class="Reptilia" family="Stegosauridae" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="subFamily" subFamily="Dacentrurinae">Dacentrurinae</taxonomicName>
|
||
(
|
||
<taxonomicName authorityName="Lucas" authorityYear="1902" box="[822,958,631,656]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[822,958,631,656]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
</taxonomicName>
|
||
+
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[994,1094,631,656]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[994,1094,631,656]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
) (
|
||
<bibRefCitation author="Mateus" box="[1122,1339,630,656]" etAl="et al." firstAuthor="Mateus" pageId="33" pageNumber="714" pagination="1815 - 1821" refId="ref43602" refString="MATEUS O., MAIDMENT S. C. & CHRISTIANSEN N. A. 2009. - A new long-necked ' sauropod-mimic'stegosaur and the evolution of the plated dinosaurs. Proceedings of the royal society B: biological sciences 276: 1815 - 1821. https: // doi. org / 10.1098 / rspb. 2008.1909" type="journal article" year="2009">
|
||
Mateus
|
||
<emphasis box="[1215,1272,630,656]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
2009
|
||
</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Costa & Mateus" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[1357,1422,630,656]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus 2019
|
||
</bibRefCitation>
|
||
). Cervical ribs are fused to para– and diapophyses in at least two cervical vertebrae. This feature is also diagnostic of
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1051,1215,725,751]" class="Reptilia" family="Stegosauridae" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="subFamily" subFamily="Dacentrurinae">Dacentrurinae</taxonomicName>
|
||
(
|
||
<bibRefCitation author="Mateus" box="[1232,1447,725,752]" etAl="et al." firstAuthor="Mateus" pageId="33" pageNumber="714" pagination="1815 - 1821" refId="ref43602" refString="MATEUS O., MAIDMENT S. C. & CHRISTIANSEN N. A. 2009. - A new long-necked ' sauropod-mimic'stegosaur and the evolution of the plated dinosaurs. Proceedings of the royal society B: biological sciences 276: 1815 - 1821. https: // doi. org / 10.1098 / rspb. 2008.1909" type="journal article" year="2009">
|
||
Mateus
|
||
<emphasis box="[1324,1380,725,751]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
2009
|
||
</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Costa & Mateus" box="[813,1066,757,784]" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[813,878,757,783]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus 2019
|
||
</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="33" pageNumber="714" type="discussion">
|
||
<paragraph blockId="33.[811,1455,215,2028]" pageId="33" pageNumber="714">
|
||
A taxonomic revision of the Late Jurassic to Early Cretaceous European stegosaurs is beyond the scope of this paper. However, if we acknowledge the existence of several species of stegosaurs closely related to
|
||
<taxonomicName authorityName="Lucas" authorityYear="1902" box="[1318,1455,886,911]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1318,1455,886,911]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation author="Costa & Mateus" box="[823,1089,917,943]" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[823,890,917,943]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus 2019
|
||
</bibRefCitation>
|
||
), we concur with
|
||
<bibRefCitation author="Cobos" etAl="et al." firstAuthor="Cobos" pageId="33" pageNumber="714" pagination="223 - 236" refId="ref37963" refString="COBOS A., ROYO- TORRES R., LUQUE L., ALCALA L. & MAMPEL L. 2010. - An Iberian stegosaurs paradise: The Villar del Arzobispo Formation (Tithonian-Berriasian) in Teruel (Spain). Palaeogeography, Palaeoclimatology, Palaeoecology 293 (1 - 2): 223 - 236. https: // doi. org / 10.1016 / j. palaeo. 2010.05.024" type="journal article" year="2010">
|
||
Cobos
|
||
<emphasis box="[1397,1455,917,943]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
(2010)
|
||
</bibRefCitation>
|
||
that, given the available diagnostic characters, and despite the discovery of a new specimen of
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1354,1455,981,1006]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1354,1455,981,1006]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation author="Costa & Mateus" box="[822,1077,1013,1039]" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[822,887,1013,1039]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus 2019
|
||
</bibRefCitation>
|
||
),
|
||
<taxonomicName authorityName="Lucas" authorityYear="1902" box="[1103,1239,1013,1038]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1103,1239,1013,1038]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1297,1398,1013,1038]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1297,1398,1013,1038]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
cannot be clearly differentiated at a generic level, at this time. Moreover, we do not understand the taxonomical logic of creating, on the one hand the new European genus,
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[813,914,1141,1166]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[813,914,1141,1166]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
, and the new sub-family
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1213,1381,1140,1166]" class="Reptilia" family="Stegosauridae" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="subFamily" subFamily="Dacentrurinae">Dacentrurinae</taxonomicName>
|
||
, while the original diagnostic characters of
|
||
<emphasis box="[1224,1368,1173,1198]" italics="true" pageId="33" pageNumber="714">
|
||
<taxonomicName authorityName="Lucas" authorityYear="1902" box="[1224,1363,1173,1198]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">Dacentrurus</taxonomicName>
|
||
,
|
||
</emphasis>
|
||
such as dorsal vertebral centra that are wider transversely than they are long anteroposteriorly (see
|
||
<bibRefCitation author="Galton" box="[1224,1370,1235,1262]" firstAuthor="Galton" pageId="33" pageNumber="714" pagination="211 - 254" refId="ref40069" refString="GALTON P. M. 1985. - British plated dinosaurs (Ornithischia, Stegosauridae). Journal of Vertebrate Paleontology 5 (3): 211 - 254. https: // doi. org / 10.1080 / 02724634.1985.10011859" type="journal article" year="1985">Galton 1985</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Maidment" etAl="et al." firstAuthor="Maidment" pageId="33" pageNumber="714" pagination="367 - 407" refId="ref42813" refString="MAIDMENT S. C., NORMAN D. B., BARRETT P. M. & UPCHURCH P. 2008. - Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology 6: 367 - 407. https: // doi. org / 10.1017 / S 1477201908002459" type="journal article" year="2008">
|
||
Maidment
|
||
<emphasis box="[877,929,1267,1293]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
2008
|
||
</bibRefCitation>
|
||
), largely encompass
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1222,1322,1268,1293]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1222,1322,1268,1293]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
, and on the other hand, synonymizing a third American genus
|
||
<taxonomicName authorityName="Galton & Carpenter" authorityYear="2016" class="Reptilia" family="Stegosauridae" genus="Alcovasaurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis italics="true" pageId="33" pageNumber="714">Alcovasaurus</emphasis>
|
||
</taxonomicName>
|
||
with
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[970,1071,1332,1357]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[970,1071,1332,1357]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation author="Costa & Mateus" box="[1089,1338,1331,1358]" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[1089,1154,1331,1357]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus 2019
|
||
</bibRefCitation>
|
||
). Pending the complete description and revision of the Late Jurassic to Early Cretaceous European stegosaur material and a phylogenetic analysis of the specimens concerned, we still prefer to synonymize
|
||
<taxonomicName authorityName="Mateus, Maidment & Christiansen" authorityYear="2009" box="[1061,1162,1460,1485]" class="Reptilia" family="Stegosauridae" genus="Miragaia" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1061,1162,1460,1485]" italics="true" pageId="33" pageNumber="714">Miragaia</emphasis>
|
||
</taxonomicName>
|
||
with
|
||
<taxonomicName authority="(Cobos et al. 2010)" baseAuthorityName="Cobos" baseAuthorityYear="2010" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1229,1365,1460,1485]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
(
|
||
<bibRefCitation author="Cobos" etAl="et al." firstAuthor="Cobos" pageId="33" pageNumber="714" pagination="223 - 236" refId="ref37963" refString="COBOS A., ROYO- TORRES R., LUQUE L., ALCALA L. & MAMPEL L. 2010. - An Iberian stegosaurs paradise: The Villar del Arzobispo Formation (Tithonian-Berriasian) in Teruel (Spain). Palaeogeography, Palaeoclimatology, Palaeoecology 293 (1 - 2): 223 - 236. https: // doi. org / 10.1016 / j. palaeo. 2010.05.024" type="journal article" year="2010">
|
||
Cobos
|
||
<emphasis box="[813,866,1491,1517]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
2010
|
||
</bibRefCitation>
|
||
)
|
||
</taxonomicName>
|
||
, which is not incompatible with the results of phylogenetic analyses (
|
||
<bibRefCitation author="RAVEN T. J. & MAIDMENT S. C." box="[1073,1365,1523,1549]" journalOrPublisher="Palaeontology" pageId="33" pageNumber="714" pagination="401 - 408" part="60" refId="ref47740" refString="RAVEN T. J. & MAIDMENT S. C. 2017. - A new phylogeny of Stegosauria (Dinosauria, Ornithischia). Palaeontology 60: 401 - 408. https: // doi. org / 10.1111 / pala. 12291" title="A new phylogeny of Stegosauria (Dinosauria, Ornithischia)" type="journal article" year="2017">Raven & Maidment 2017</bibRefCitation>
|
||
). Thus, based on
|
||
<bibRefCitation author="Costa & Mateus" box="[923,1199,1555,1581]" firstAuthor="Costa" pageId="33" pageNumber="714" pagination="0224263" refId="ref38250" refString="COSTA F. & MATEUS O. 2019. - Dacentrurine stegosaurs (Dinosauria): A new specimen of Miragaia longicollum from the Late Jurassic of Portugal resolves taxonomical validity and shows the occurrence of the clade in North America. PloS one 14 (11): e 0224263. https: // doi. org / 10.1371 / journal. pone. 0224263" type="journal article" year="2019">
|
||
<collectingRegion box="[923,988,1555,1581]" country="Tanzania" name="Pwani" pageId="33" pageNumber="714">Costa</collectingRegion>
|
||
& Mateus (2019)
|
||
</bibRefCitation>
|
||
, the Angeac-Charente stegosaur may be more closely related to
|
||
<taxonomicName class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="species" species="longicollum">
|
||
<emphasis italics="true" pageId="33" pageNumber="714">Dacentrurus longicollum</emphasis>
|
||
</taxonomicName>
|
||
(comb. nov.), because the cervical transverse processes of a posterior cervical vertebra project ventral to the ventral margin of the prezygapophyses. Nevertheless, it is very difficult to assess the condition of this feature in
|
||
<taxonomicName baseAuthorityName="Marsh" baseAuthorityYear="1877" box="[842,966,1747,1772]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="species" species="armatus">
|
||
<emphasis box="[842,966,1747,1772]" italics="true" pageId="33" pageNumber="714">D. armatus</emphasis>
|
||
</taxonomicName>
|
||
, given that only one half of a neural arch is preserved in the
|
||
<typeStatus box="[997,1045,1778,1804]" pageId="33" pageNumber="714">type</typeStatus>
|
||
species (
|
||
<bibRefCitation author="Owen" box="[1146,1279,1778,1805]" firstAuthor="Owen" pageId="33" pageNumber="714" refId="ref45356" refString="OWEN R. 1875. - Monographs on the Fossil Reptilia of the Mesozoic Formations. Part II. (Genera Bothriospondylus, Cetiosaurus, Omosaurus). The Palaeontographical society, London: 15 - 93 (Monograph of the Palaeontological Society; 29)." type="journal volume" year="1875">Owen 1875</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Galton" box="[1294,1438,1778,1805]" firstAuthor="Galton" pageId="33" pageNumber="714" pagination="211 - 254" refId="ref40069" refString="GALTON P. M. 1985. - British plated dinosaurs (Ornithischia, Stegosauridae). Journal of Vertebrate Paleontology 5 (3): 211 - 254. https: // doi. org / 10.1080 / 02724634.1985.10011859" type="journal article" year="1985">Galton 1985</bibRefCitation>
|
||
). In any case, the Angeac-Charente taxon is closely related to the English, Spanish and Portuguese stegosaurs, and it is the youngest occurrence of
|
||
<taxonomicName box="[1146,1282,1874,1899]" class="Reptilia" family="Stegosauridae" genus="Dacentrurus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[1146,1282,1874,1899]" italics="true" pageId="33" pageNumber="714">Dacentrurus</emphasis>
|
||
</taxonomicName>
|
||
. In addition to bony remains, about 100 stegosaur natural track casts in a range of sizes have been identified and documented on a single bedding plane in the CG3 plot, and assign to the ichnotaxon
|
||
<taxonomicName authorityName="Whyte & Romano" authorityYear="1994" box="[944,1064,2001,2027]" class="Reptilia" genus="Deltapodus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="33" pageNumber="714" phylum="Chordata" rank="genus">
|
||
<emphasis box="[944,1064,2001,2027]" italics="true" pageId="33" pageNumber="714">Deltapodus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation author="ROZADA L." bookContentInfo="283 p." box="[1079,1223,2001,2027]" journalOrPublisher="PhD Thesis, Paris, Museum national d'histoire naturelle" pageId="33" pageNumber="714" refId="ref48266" refString="ROZADA L. 2019. - Taphonomie de l'assemblage de macrorestes fossiles de vertebres du Lagerstatte d'Angeac-Charente (Cretace inferieur, Charente, France). PhD Thesis, Paris, Museum national d'histoire naturelle, 283 p." title="Taphonomie de l'assemblage de macrorestes fossiles de vertebres du Lagerstatte d'Angeac-Charente (Cretace inferieur, Charente, France)" type="book" year="2019">Rozada 2019</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="ROZADA L. & ALLAIN R. & VULLO R. & AUGIER D. & GOEDERT J. & JEAN A. & ROYO- TORRES R. & QVARNSTROM M. & PEYRE DE FABREGUES C. & MARCHAL J." box="[1237,1438,2001,2027]" journalOrPublisher="Lethaia" pageId="33" pageNumber="714" pagination="141 - 165" part="54" refId="ref48377" refString="ROZADA L., ALLAIN R., VULLO R., AUGIER D., GOEDERT J., JEAN A., ROYO- TORRES R., QVARNSTROM M., PEYRE DE FABREGUES C. & MARCHAL J. 2021. - A Lower Cretaceous Lagerstatte from Western Europe: taphonomical overview of the vertebrate assemblage of Angeac-Charente site (Western France). Lethaia 54: 141 - 165. https: // doi. org / 10.1111 / let. 12394" title="A Lower Cretaceous Lagerstatte from Western Europe: taphonomical overview of the vertebrate assemblage of Angeac-Charente site (Western France)" type="journal article" year="2021">
|
||
Rozada
|
||
<emphasis box="[1324,1376,2001,2027]" italics="true" pageId="33" pageNumber="714">et al.</emphasis>
|
||
2021
|
||
</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |