301 lines
35 KiB
XML
301 lines
35 KiB
XML
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<mods:title id="F304C044EDD8B9A780DA298C3B98B3CE">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="0C164C3CA3994153CC3CCB6D2AE78801">Allain, Ronan</mods:namePart>
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<mods:namePart id="AB7CCF934D82BC8EBE49B442E7433436">Rozada, Lee</mods:namePart>
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<mods:namePart id="59E089D0FD0DBD6AFB8F1131EDB31D1C">Bourgeais, Renaud</mods:namePart>
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<mods:namePart id="AA71C2707821F1A821E4FC585A2A6F97">Fabrègues, Claire Peyre De</mods:namePart>
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<mods:namePart id="D60349349E7D41C430080E5FED4F19FD">Royo-Torres, Rafael</mods:namePart>
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<mods:namePart id="100055A147632EBD2ED7976F818B1A8B">Bailly, Gilles</mods:namePart>
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<mods:title id="3DD96CFF508D064C711B282FAC3C7325">Geodiversitas</mods:title>
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<mods:part id="5C7D76646899ACD01548C41995CB13C0">
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<mods:date id="FDA14D787067476C5BA67D56EC7D08FC">2022</mods:date>
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<mods:number id="924C9AEF8D04D81E25661DC8DA1D9576">2022-07-21</mods:number>
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<mods:number id="6FEBD434546071606DFB8F81F9103124">44</mods:number>
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<mods:identifier id="E762B2F452FA9E4D508CE6B3FCBA7E23" type="DOI">10.5252/geodiversitas2022v44a25</mods:identifier>
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<treatment id="03C887B9FFAAFFF576E6A48AFB23F93D" ID-DOI="http://doi.org/10.5281/zenodo.6928906" ID-GBIF-Taxon="197866746" ID-Zenodo-Dep="6928906" LSID="urn:lsid:plazi:treatment:03C887B9FFAAFFF576E6A48AFB23F93D" httpUri="http://treatment.plazi.org/id/03C887B9FFAAFFF576E6A48AFB23F93D" lastPageId="30" lastPageNumber="711" pageId="28" pageNumber="709">
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<subSubSection id="C37B6524FFAAFFF776E6A48AFAEAF97D" box="[988,1281,1714,1740]" pageId="28" pageNumber="709" type="nomenclature">
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<paragraph id="8BDE36AFFFAAFFF776E6A48AFAEAF97D" blockId="28.[988,1281,1714,1772]" box="[988,1281,1714,1740]" pageId="28" pageNumber="709">
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<taxonomicName id="4C614D2CFFAAFFF776E6A48AFB51F97D" authorityName="Dollo" authorityYear="1882" box="[988,1210,1714,1740]" class="Reptilia" family="Hypsilophodontidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ornithischia" pageId="28" pageNumber="709" phylum="Chordata" rank="family">Hypsilophodontidae</taxonomicName>
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indet.
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</paragraph>
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</subSubSection>
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<subSubSection id="C37B6524FFAAFFF57112A4EAFB23F93D" lastPageId="30" lastPageNumber="711" pageId="28" pageNumber="709" type="description">
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<paragraph id="8BDE36AFFFAAFFF77112A4EAFB5FF95D" blockId="28.[988,1281,1714,1772]" box="[1064,1204,1746,1772]" pageId="28" pageNumber="709">
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(
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<figureCitation id="135A2A2AFFAAFFF7710BA4EAFB40F95D" box="[1073,1195,1746,1772]" captionStart="FIG" captionStartId="29.[132,143,1940,1957]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-23@29.[698,1267,768,1324]" captionTargetPageId="29" captionText="FIG. 21. — Ornithischian teeth from Angeac-Charente: A, B, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG15-R671) in lingual (A) and labial (B) views; C, D, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG14-3368) in lingual (C) and labial (D) views; E, F, hypsilophodontid premaxillary tooth (ANG M-119) in lingual (E) and labial (F) views; G, H, hypsilophodontid dentary tooth (ANG15-R927) in labial (G) and lingual (H) views; I-L, hypsilophodontid maxillary tooth (ANG 10-153) in lingual (I), distal (J), labial (K) and mesial (L) views. Scale bars: A-D, I-L, 5 mm; E-H, 3 mm." figureDoi="http://doi.org/10.5281/zenodo.6902085" httpUri="https://zenodo.org/record/6902085/files/figure.png" pageId="28" pageNumber="709">Fig. 21E, F</figureCitation>
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)
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</paragraph>
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<paragraph id="8BDE36AFFFAAFFF77617A52AFC53F89D" blockId="28.[812,1457,1810,2028]" box="[813,952,1810,1836]" pageId="28" pageNumber="709">DESCRIPTION</paragraph>
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<paragraph id="8BDE36AFFFAAFFF77617A509FC07F8FA" blockId="28.[812,1457,1810,2028]" box="[813,1004,1841,1867]" pageId="28" pageNumber="709">
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<emphasis id="B915EABDFFAAFFF77617A509FC07F8FA" box="[813,1004,1841,1867]" italics="true" pageId="28" pageNumber="709">Premaxillary tooth</emphasis>
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</paragraph>
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<paragraph id="8BDE36AFFFAAFFF57617A56AFE2DFC1E" blockId="28.[812,1457,1810,2028]" lastBlockId="30.[130,777,215,943]" lastPageId="30" lastPageNumber="711" pageId="28" pageNumber="709">
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A well-preserved isolated hypsilophodontid crown (ANG M-119) only lacks its apex (
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<figureCitation id="135A2A2AFFAAFFF77158A549FB0AF83D" box="[1122,1249,1905,1932]" captionStart="FIG" captionStartId="29.[132,143,1940,1957]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-23@29.[698,1267,768,1324]" captionTargetPageId="29" captionText="FIG. 21. — Ornithischian teeth from Angeac-Charente: A, B, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG15-R671) in lingual (A) and labial (B) views; C, D, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG14-3368) in lingual (C) and labial (D) views; E, F, hypsilophodontid premaxillary tooth (ANG M-119) in lingual (E) and labial (F) views; G, H, hypsilophodontid dentary tooth (ANG15-R927) in labial (G) and lingual (H) views; I-L, hypsilophodontid maxillary tooth (ANG 10-153) in lingual (I), distal (J), labial (K) and mesial (L) views. Scale bars: A-D, I-L, 5 mm; E-H, 3 mm." figureDoi="http://doi.org/10.5281/zenodo.6902085" httpUri="https://zenodo.org/record/6902085/files/figure.png" pageId="28" pageNumber="709">Fig. 21E, F</figureCitation>
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). In general shape, it is very similar to the aforementioned heterodontosaurid premaxillary teeth, but has a less bulbous morphology, bears denticles and lacks a wear facet on the lingual surface of the crown. Based on its shape, it is identified as a premaxillary tooth, the maxillary and dentary teeth being more quadrangular in shape (
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<bibRefCitation id="EFF04B5EFFA8FFF57410A320FE14FE80" author="Norman" box="[298,511,279,306]" etAl="et al." firstAuthor="Norman" pageId="30" pageNumber="711" refId="ref44868" refString="NORMAN D. B., SUES H. - D., WITMER L. M. & CORIA R. A. 2004. - Basal Ornithopoda, in WEISHAMPEL D. B., DODSON P. & OSMOLSKA H. (eds), The Dinosauria. Edition 2. University of California Press, Berkeley, 880 p." type="book" year="2004">
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Norman
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<emphasis id="B915EABDFFA8FFF574B7A320FE2BFE80" box="[397,448,279,305]" italics="true" pageId="30" pageNumber="711">et al.</emphasis>
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2004
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</bibRefCitation>
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: fig. 18.3). The crown is recurved folidont (
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<bibRefCitation id="EFF04B5EFFA8FFF57477A30FFDA8FEE3" author="Hendrickx" box="[333,579,311,338]" etAl="et al." firstAuthor="Hendrickx" pageId="30" pageNumber="711" pagination="982797" refId="ref41131" refString="HENDRICKX C., MATEUS O. & ARAUJO R. 2015 a. - A proposed terminology of theropod teeth (Dinosauria, Saurischia). Journal of Vertebrate Paleontology 35: e 982797. https: // doi. org / 10.108 0 / 02724634.2015.982797." type="journal article" year="2015" yearSuffix="a">
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Hendrickx
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<emphasis id="B915EABDFFA8FFF574FDA300FE11FEE0" box="[455,506,311,337]" italics="true" pageId="30" pageNumber="711">et al.</emphasis>
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2015a
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</bibRefCitation>
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) and short, with a mesiodistal basal length of
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<quantity id="4C999B4AFFA8FFF574ADA36FFE3FFEC0" box="[407,468,343,369]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="30" pageNumber="711" unit="mm" value="3.0">3 mm</quantity>
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and a preserved crown height of
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<quantity id="4C999B4AFFA8FFF575A4A34FFF09FE20" box="[158,226,375,401]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="30" pageNumber="711" unit="mm" value="4.0">4 mm</quantity>
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. It appears quite similar to the premaxillary teeth of
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<taxonomicName id="4C614D2CFFA8FFF575B9A3AFFF38FE00" box="[131,211,407,433]" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
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<emphasis id="B915EABDFFA8FFF575B9A3AFFF38FE00" box="[131,211,407,433]" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
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</taxonomicName>
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figured by
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<bibRefCitation id="EFF04B5EFFA8FFF57470A3AEFE37FE00" author="Galton" box="[330,476,406,433]" firstAuthor="Galton" pageId="30" pageNumber="711" pagination="211 - 273" refId="ref40109" refString="GALTON P. M. 2009. - Notes on Neocomian (Lower Cretaceous) ornithopod dinosaurs from England - Hypsilophodon, Valdosaurus, " Camptosaurus ", " Iguanodon " - and referred specimens from Romania and elsewhere. Revue de Paleobiologie 28: 211 - 273." type="journal article" year="2009">Galton (2009</bibRefCitation>
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: fig. 2G, L-P). The crown is compressed labiolingually and has a slightly convex surface on both sides. At mid-height, the cross-section is elliptical. The main axis of the crown is recurved, so that in lingual and labial views, the apex appears distal to the midpoint of the base of the crown. Both the mesial and distal margins are mesially and distally expanded respectively at their base. However, the mesial margin is convex, whereas the distal margin is concave for most of its length. The carinae extend from the apex along two-thirds of the crown and bear a series of fine, bulbous denticles. The mesial carina is damaged, but all the denticles are visible on the distal border. The density of the denticles is approximately 6 per mm. The crown surfaces have a relatively smooth texture. The crown enamel does not extend further basally on one particular side as for dentary teeth (see below). There is a visible constriction forming a cervix, at the base of the root.
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</paragraph>
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<caption id="DF1E6627FFABFFF675BEA5ACFBBBF858" ID-DOI="http://doi.org/10.5281/zenodo.6902085" ID-Zenodo-Dep="6902085" httpUri="https://zenodo.org/record/6902085/files/figure.png" pageId="29" pageNumber="710" startId="29.[132,143,1940,1957]" targetBox="[132,1455,215,1878]" targetPageId="29">
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<paragraph id="8BDE36AFFFABFFF675BEA5ACFBBBF858" blockId="29.[132,1456,1940,2025]" pageId="29" pageNumber="710">
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FIG. 21. — Ornithischian teeth from Angeac-Charente:
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<emphasis id="B915EABDFFABFFF67775A5ACFDB7F814" bold="true" box="[591,604,1940,1957]" pageId="29" pageNumber="710">A</emphasis>
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,
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<emphasis id="B915EABDFFABFFF6775DA5ACFD9FF814" bold="true" box="[615,628,1940,1957]" pageId="29" pageNumber="710">B</emphasis>
|
|
, Heterodontosaurid premaxillary tooth of
|
|
<taxonomicName id="4C614D2CFFABFFF676EFA5ACFBBBF814" box="[981,1104,1940,1957]" class="Reptilia" family="Scutellosauridae" genus="Echinodon" kingdom="Animalia" order="Ornithischia" pageId="29" pageNumber="710" phylum="Chordata" rank="species" species="undetermined">
|
|
<emphasis id="B915EABDFFABFFF676EFA5ACFBC5F814" box="[981,1070,1940,1957]" italics="true" pageId="29" pageNumber="710">Echinodon</emphasis>
|
|
sp.
|
|
</taxonomicName>
|
|
(ANG15-R671) in lingual (
|
|
<emphasis id="B915EABDFFABFFF67013A5ACFADDF814" bold="true" box="[1321,1334,1940,1957]" pageId="29" pageNumber="710">A</emphasis>
|
|
) and labial (
|
|
<emphasis id="B915EABDFFABFFF670A7A5ACFA41F814" bold="true" box="[1437,1450,1940,1957]" pageId="29" pageNumber="710">B</emphasis>
|
|
) views;
|
|
<emphasis id="B915EABDFFABFFF67584A593FF27F80D" bold="true" box="[190,204,1963,1980]" pageId="29" pageNumber="710">C</emphasis>
|
|
,
|
|
<emphasis id="B915EABDFFABFFF675EDA593FF0EF80D" bold="true" box="[215,229,1963,1980]" pageId="29" pageNumber="710">D</emphasis>
|
|
, Heterodontosaurid premaxillary tooth of
|
|
<taxonomicName id="4C614D2CFFABFFF67778A593FD57F80D" box="[578,700,1963,1980]" class="Reptilia" family="Scutellosauridae" genus="Echinodon" kingdom="Animalia" order="Ornithischia" pageId="29" pageNumber="710" phylum="Chordata" rank="species" species="undetermined">
|
|
<emphasis id="B915EABDFFABFFF67778A593FD70F80D" box="[578,667,1963,1980]" italics="true" pageId="29" pageNumber="710">Echinodon</emphasis>
|
|
sp.
|
|
</taxonomicName>
|
|
(ANG14-3368) in lingual (
|
|
<emphasis id="B915EABDFFABFFF676ABA593FC74F80D" bold="true" box="[913,927,1963,1980]" pageId="29" pageNumber="710">C</emphasis>
|
|
) and labial (
|
|
<emphasis id="B915EABDFFABFFF6713EA593FBF9F80D" bold="true" box="[1028,1042,1963,1980]" pageId="29" pageNumber="710">D</emphasis>
|
|
) views;
|
|
<emphasis id="B915EABDFFABFFF6716CA593FB89F80D" bold="true" box="[1110,1122,1963,1980]" pageId="29" pageNumber="710">E</emphasis>
|
|
,
|
|
<emphasis id="B915EABDFFABFFF67157A593FB93F80D" bold="true" box="[1133,1144,1963,1980]" pageId="29" pageNumber="710">F</emphasis>
|
|
, hypsilophodontid premaxillary tooth (ANG M-119) in lingual (
|
|
<emphasis id="B915EABDFFABFFF6747DA5FAFEB8F862" bold="true" box="[327,339,1986,2003]" pageId="29" pageNumber="710">E</emphasis>
|
|
) and labial (
|
|
<emphasis id="B915EABDFFABFFF6748EA5FAFE54F862" bold="true" box="[436,447,1986,2003]" pageId="29" pageNumber="710">F</emphasis>
|
|
) views;
|
|
<emphasis id="B915EABDFFABFFF6773BA5FAFDE4F862" bold="true" box="[513,527,1986,2003]" pageId="29" pageNumber="710">G</emphasis>
|
|
,
|
|
<emphasis id="B915EABDFFABFFF67722A5FAFDCDF862" bold="true" box="[536,550,1986,2003]" pageId="29" pageNumber="710">H</emphasis>
|
|
, hypsilophodontid dentary tooth (ANG15-R927) in labial (
|
|
<emphasis id="B915EABDFFABFFF676C7A5FAFBE0F862" bold="true" box="[1021,1035,1986,2003]" pageId="29" pageNumber="710">G</emphasis>
|
|
) and lingual (
|
|
<emphasis id="B915EABDFFABFFF6714DA5FAFB6EF862" bold="true" box="[1143,1157,1986,2003]" pageId="29" pageNumber="710">H</emphasis>
|
|
) views;
|
|
<emphasis id="B915EABDFFABFFF671FCA5FAFB35F862" bold="true" box="[1222,1246,1986,2003]" pageId="29" pageNumber="710">I -L</emphasis>
|
|
, hypsilophodontid maxillary tooth (ANG 10-153) in lingual (
|
|
<emphasis id="B915EABDFFABFFF67499A5E0FE42F858" bold="true" box="[419,425,2008,2025]" pageId="29" pageNumber="710">I</emphasis>
|
|
), distal (
|
|
<emphasis id="B915EABDFFABFFF674D4A5E0FE13F858" bold="true" box="[494,504,2008,2025]" pageId="29" pageNumber="710">J</emphasis>
|
|
), labial (
|
|
<emphasis id="B915EABDFFABFFF67707A5E0FDA1F858" bold="true" box="[573,586,2008,2025]" pageId="29" pageNumber="710">K</emphasis>
|
|
) and mesial (
|
|
<emphasis id="B915EABDFFABFFF67783A5E0FD2FF858" bold="true" box="[697,708,2008,2025]" pageId="29" pageNumber="710">L</emphasis>
|
|
) views. Scale bars: A-D, I-L, 5 mm; E-H, 3 mm.
|
|
</paragraph>
|
|
</caption>
|
|
<paragraph id="8BDE36AFFFA8FFF575BEA1ECFECDFC5F" blockId="30.[132,294,980,1006]" box="[132,294,980,1006]" pageId="30" pageNumber="711">
|
|
<heading id="D09681C3FFA8FFF575BEA1ECFECDFC5F" box="[132,294,980,1006]" fontSize="11" level="2" pageId="30" pageNumber="711" reason="8">
|
|
<emphasis id="B915EABDFFA8FFF575BEA1ECFECDFC5F" box="[132,294,980,1006]" italics="true" pageId="30" pageNumber="711">Maxillary tooth</emphasis>
|
|
</heading>
|
|
</paragraph>
|
|
<paragraph id="8BDE36AFFFA8FFF575BEA1CDFCE1F85A" blockId="30.[130,778,1012,2028]" pageId="30" pageNumber="711">
|
|
One well-preserved and complete isolated hypsilophodontid maxillary tooth (ANG10-153) (
|
|
<figureCitation id="135A2A2AFFA8FFF574EAA62CFDFCFB9F" box="[464,535,1044,1070]" captionStart="FIG" captionStartId="29.[132,143,1940,1957]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-23@29.[698,1267,768,1324]" captionTargetPageId="29" captionText="FIG. 21. — Ornithischian teeth from Angeac-Charente: A, B, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG15-R671) in lingual (A) and labial (B) views; C, D, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG14-3368) in lingual (C) and labial (D) views; E, F, hypsilophodontid premaxillary tooth (ANG M-119) in lingual (E) and labial (F) views; G, H, hypsilophodontid dentary tooth (ANG15-R927) in labial (G) and lingual (H) views; I-L, hypsilophodontid maxillary tooth (ANG 10-153) in lingual (I), distal (J), labial (K) and mesial (L) views. Scale bars: A-D, I-L, 5 mm; E-H, 3 mm." figureDoi="http://doi.org/10.5281/zenodo.6902085" httpUri="https://zenodo.org/record/6902085/files/figure.png" pageId="30" pageNumber="711">Fig. 21</figureCitation>
|
|
I-L) has been recovered from Angeac-Charente. It is
|
|
<quantity id="4C999B4AFFA8FFF5748BA60CFE15FBFE" box="[433,510,1076,1103]" metricMagnitude="-2" metricUnit="m" metricValue="2.7" pageId="30" pageNumber="711" unit="mm" value="27.0">27 mm</quantity>
|
|
long with the root being twice as long as the crown. The crown is sub-quadrangular and short, with a mesiodistal basal length of
|
|
<quantity id="4C999B4AFFA8FFF5770DA64CFD93FB3E" box="[567,632,1140,1167]" metricMagnitude="-3" metricUnit="m" metricValue="6.0" pageId="30" pageNumber="711" unit="mm" value="6.0">6 mm</quantity>
|
|
and a crown height of
|
|
<quantity id="4C999B4AFFA8FFF575D7A6ACFEAAFB1F" box="[237,321,1172,1198]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="30" pageNumber="711" unit="mm" value="10.0">10 mm</quantity>
|
|
. It looks similar to the maxillary crown of
|
|
<taxonomicName id="4C614D2CFFA8FFF575BFA68DFF3CFB7F" box="[133,215,1204,1230]" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
|
|
<emphasis id="B915EABDFFA8FFF575BFA68DFF3CFB7F" box="[133,215,1204,1230]" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
|
|
</taxonomicName>
|
|
(
|
|
<bibRefCitation id="EFF04B5EFFA8FFF575D2A68CFE9FFB7F" author="Galton" box="[232,372,1204,1230]" firstAuthor="Galton" pageId="30" pageNumber="711" pagination="1 - 152" refId="ref39888" refString="GALTON P. M. 1974. - The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bulletin of the British Museum (Natural History) Geology 25 (1): 1 - 152. https: // www. biodiversitylibrary. org / page / 2239368" type="journal article" year="1974">Galton 1974</bibRefCitation>
|
|
: fig. 14a, b). The crown is expanded mesiodistally, compressed labiolingually, and has a sub-oval cross section at mid height. The lingual surface is relatively flat, whereas the labial surface bears a longitudinal concavity in the central area of the crown and is convex mesiodistally. In lingual and labial views, the main axis of the crown is straight, but the apex is displaced distally relatively to the midpoint of the crown base. The rounded apex is however not distally bent, but strictly ventrally oriented. The mesial and distal margins are subparallel, even if the mesial margin is slightly convex, whereas the distal one is straight with a small angle at mid-height. The carinae are located on the upper portions of the mesial and distal edges, and on the apical border of the crown. The tooth carinae are covered by small denticles throughout their length, in contrast to the
|
|
<taxonomicName id="4C614D2CFFA8FFF577D3A44BFF59F91D" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
|
|
<emphasis id="B915EABDFFA8FFF577D3A44BFF59F91D" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
|
|
</taxonomicName>
|
|
tooth figured by
|
|
<bibRefCitation id="EFF04B5EFFA8FFF57443A4AAFDE6F91D" author="Galton" box="[377,525,1682,1708]" firstAuthor="Galton" pageId="30" pageNumber="711" pagination="1 - 152" refId="ref39888" refString="GALTON P. M. 1974. - The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bulletin of the British Museum (Natural History) Geology 25 (1): 1 - 152. https: // www. biodiversitylibrary. org / page / 2239368" type="journal article" year="1974">Galton (1974</bibRefCitation>
|
|
: fig. 14a, b), in which the apical border is worn and, therefore lacks denticles. The mesial carina is damaged, but probably exhibited denticles. The distal and apical carinae exhibit large and regular denticles, at a frequency of approximately 1 per mm. They are rounded in shape, apicobasally oriented and their size slightly increases towards the apex. The denticles on the apical margin are smoothly worn and, consequently, an extended single and oblique wear facet is visible on the dorsal part of the lingual surface. There is no wear on the labial surface, but small ridges extend ventrally to denticles, towards the crown base.
|
|
</paragraph>
|
|
<paragraph id="8BDE36AFFFA8FFF57616A2EFFBF0FE60" blockId="30.[811,1458,215,720]" pageId="30" pageNumber="711">
|
|
The longest visible is almost
|
|
<quantity id="4C999B4AFFA8FFF57162A2EFFB7CFF43" box="[1112,1175,215,242]" metricMagnitude="-3" metricUnit="m" metricValue="6.0" pageId="30" pageNumber="711" unit="mm" value="6.0">6 mm</quantity>
|
|
long and is directly mesial to the apex. The enamel texture is relatively smooth, except towards the base of the crown where it is more irregular. The crown enamel is clearly more basally extended on the labial side than on the lingual side of the tooth. Consequently, the base of the crown appears swollen on the labial surface and forms an incipient cingulum, as in most basal euornithopods (
|
|
<bibRefCitation id="EFF04B5EFFA8FFF5760CA38FFBE0FE60" author="Norman" box="[822,1035,438,465]" etAl="et al." firstAuthor="Norman" pageId="30" pageNumber="711" refId="ref44868" refString="NORMAN D. B., SUES H. - D., WITMER L. M. & CORIA R. A. 2004. - Basal Ornithopoda, in WEISHAMPEL D. B., DODSON P. & OSMOLSKA H. (eds), The Dinosauria. Edition 2. University of California Press, Berkeley, 880 p." type="book" year="2004">
|
|
Norman
|
|
<emphasis id="B915EABDFFA8FFF576A3A38FFC27FE61" box="[921,972,438,464]" italics="true" pageId="30" pageNumber="711">et al.</emphasis>
|
|
2004
|
|
</bibRefCitation>
|
|
).
|
|
</paragraph>
|
|
<paragraph id="8BDE36AFFFA8FFF57679A3EFFC00FD61" blockId="30.[811,1458,215,720]" pageId="30" pageNumber="711">
|
|
At the level of the cervix, there is a constriction in labial and lingual views. It is not particularly pronounced, in which respect it differs from the condition observed in
|
|
<taxonomicName id="4C614D2CFFA8FFF5701BA02FFA84FD81" box="[1313,1391,534,560]" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
|
|
<emphasis id="B915EABDFFA8FFF5701BA02FFA84FD81" box="[1313,1391,534,560]" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
|
|
</taxonomicName>
|
|
(
|
|
<bibRefCitation id="EFF04B5EFFA8FFF570BAA02EFC64FDE1" author="Galton" firstAuthor="Galton" pageId="30" pageNumber="711" pagination="1 - 152" refId="ref39888" refString="GALTON P. M. 1974. - The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bulletin of the British Museum (Natural History) Geology 25 (1): 1 - 152. https: // www. biodiversitylibrary. org / page / 2239368" type="journal article" year="1974">Galton 1974</bibRefCitation>
|
|
: fig. 14a, b). The root is long, tubular and narrower than the crown. Its mesiodistal width decreases towards the apex, whereas its labiolingual thickness is more or less equivalent on most of the root length and only decreases slightly towards the apex.
|
|
</paragraph>
|
|
<paragraph id="8BDE36AFFFA8FFF57617A0CEFC56FCBE" blockId="30.[813,957,757,783]" box="[813,957,757,783]" pageId="30" pageNumber="711">
|
|
<heading id="D09681C3FFA8FFF57617A0CEFC56FCBE" box="[813,957,757,783]" fontSize="11" level="2" pageId="30" pageNumber="711" reason="8">
|
|
<emphasis id="B915EABDFFA8FFF57617A0CEFC56FCBE" box="[813,957,757,783]" italics="true" pageId="30" pageNumber="711">Dentary tooth</emphasis>
|
|
</heading>
|
|
</paragraph>
|
|
<paragraph id="8BDE36AFFFA8FFF57617A12DFB23F93D" blockId="30.[811,1458,789,1677]" pageId="30" pageNumber="711">
|
|
An isolated hypsilophodontid dentary crown, only lacking the apex, has also been recovered at Angeac-Charente, (ANG R-927;
|
|
<figureCitation id="135A2A2AFFA8FFF576EAA16DFBF7FCDE" box="[976,1052,853,879]" captionStart="FIG" captionStartId="29.[132,143,1940,1957]" captionTargetBox="[132,1455,215,1878]" captionTargetId="figure-23@29.[698,1267,768,1324]" captionTargetPageId="29" captionText="FIG. 21. — Ornithischian teeth from Angeac-Charente: A, B, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG15-R671) in lingual (A) and labial (B) views; C, D, Heterodontosaurid premaxillary tooth of Echinodon sp. (ANG14-3368) in lingual (C) and labial (D) views; E, F, hypsilophodontid premaxillary tooth (ANG M-119) in lingual (E) and labial (F) views; G, H, hypsilophodontid dentary tooth (ANG15-R927) in labial (G) and lingual (H) views; I-L, hypsilophodontid maxillary tooth (ANG 10-153) in lingual (I), distal (J), labial (K) and mesial (L) views. Scale bars: A-D, I-L, 5 mm; E-H, 3 mm." figureDoi="http://doi.org/10.5281/zenodo.6902085" httpUri="https://zenodo.org/record/6902085/files/figure.png" pageId="30" pageNumber="711">Fig. 21</figureCitation>
|
|
G-H). The crown is straight folidont (
|
|
<bibRefCitation id="EFF04B5EFFA8FFF5760CA14DFBC6FC21" author="Hendrickx" box="[822,1069,885,912]" etAl="et al." firstAuthor="Hendrickx" pageId="30" pageNumber="711" pagination="982797" refId="ref41131" refString="HENDRICKX C., MATEUS O. & ARAUJO R. 2015 a. - A proposed terminology of theropod teeth (Dinosauria, Saurischia). Journal of Vertebrate Paleontology 35: e 982797. https: // doi. org / 10.108 0 / 02724634.2015.982797." type="journal article" year="2015" yearSuffix="a">
|
|
Hendrickx
|
|
<emphasis id="B915EABDFFA8FFF5768AA14EFC08FC3E" box="[944,995,885,911]" italics="true" pageId="30" pageNumber="711">et al.</emphasis>
|
|
2015a
|
|
</bibRefCitation>
|
|
) and short, with a mesiodistal basal length of
|
|
<quantity id="4C999B4AFFA8FFF576ACA1ADFC33FC1E" box="[918,984,917,943]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="30" pageNumber="711" unit="mm" value="4.0">4 mm</quantity>
|
|
and a preserved crown height of
|
|
<quantity id="4C999B4AFFA8FFF5707EA1ADFA61FC1E" box="[1348,1418,917,944]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" pageId="30" pageNumber="711" unit="mm" value="5.0">5 mm</quantity>
|
|
. At mid-length, it has a semicircular cross-section. In lingual and labial views it is diamond-shaped, and the proportions and shape are quite similar to the dentary teeth of
|
|
<taxonomicName id="4C614D2CFFA8FFF5703CA1CDFABFFBBE" box="[1286,1364,1013,1039]" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
|
|
<emphasis id="B915EABDFFA8FFF5703CA1CDFABFFBBE" box="[1286,1364,1013,1039]" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
|
|
</taxonomicName>
|
|
(
|
|
<bibRefCitation id="EFF04B5EFFA8FFF5705EA1CCFC8EFB9F" author="Galton" firstAuthor="Galton" pageId="30" pageNumber="711" pagination="1 - 152" refId="ref39888" refString="GALTON P. M. 1974. - The ornithischian dinosaur Hypsilophodon from the Wealden of the Isle of Wight. Bulletin of the British Museum (Natural History) Geology 25 (1): 1 - 152. https: // www. biodiversitylibrary. org / page / 2239368" type="journal article" year="1974">Galton 1974</bibRefCitation>
|
|
: fig. 15; 2009: fig. 3). The crown is compressed labiolingually, with a convex labial surface and a slightly concave lingual surface. The main axis of the crown is straight, and the apex was most likely directed strictly dorsally. The mesial and distal borders are strongly convex, forming an angle of approximately 100° at mid-height of the crown. The carinae extend from there towards the apex. They bear a series of large denticles. The denticles are regular and semicircular, and have an apicobasal orientation. Ventral to each denticle, a blunt ridge extends towards the crown base on the lingual surface. It seems that the same ridges are also present on the labial surface, but this cannot be assessed with certainty because the tooth is eroded. On the lingual surface, the longest and most pronounced ridge is positioned below the apex. On the labial surface, three subvertical and subparallel ridges are visible on the central area of the crown. The enamel texture is irregular. The crown enamel extends further basally on the labial side than on the lingual side. A marked constriction is visible at the base of the crown, as in the dentary teeth of
|
|
<taxonomicName id="4C614D2CFFA8FFF570A8A46BFCB0F93D" class="Reptilia" genus="Haopterus" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="30" pageNumber="711" phylum="Chordata" rank="species" species="foxii">
|
|
<emphasis id="B915EABDFFA8FFF570A8A46BFCB0F93D" italics="true" pageId="30" pageNumber="711">H. foxii</emphasis>
|
|
</taxonomicName>
|
|
(
|
|
<bibRefCitation id="EFF04B5EFFA8FFF57650A44BFBD4F93D" author="Norman" box="[874,1087,1650,1677]" etAl="et al." firstAuthor="Norman" pageId="30" pageNumber="711" refId="ref44868" refString="NORMAN D. B., SUES H. - D., WITMER L. M. & CORIA R. A. 2004. - Basal Ornithopoda, in WEISHAMPEL D. B., DODSON P. & OSMOLSKA H. (eds), The Dinosauria. Edition 2. University of California Press, Berkeley, 880 p." type="book" year="2004">
|
|
Norman
|
|
<emphasis id="B915EABDFFA8FFF576F7A44BFBEAF93D" box="[973,1025,1650,1676]" italics="true" pageId="30" pageNumber="711">et al.</emphasis>
|
|
2004
|
|
</bibRefCitation>
|
|
: fig. 18.3E).
|
|
</paragraph>
|
|
</subSubSection>
|
|
</treatment>
|
|
</document> |