304 lines
38 KiB
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304 lines
38 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/fr.26.e93456" ID-Pensoft-Pub="2193-0074-1-1" ID-Pensoft-UUID="31E88D0E24BE5C97B7D3DF99135E1514" ID-ZooBank="F8C273F5D7C54A5CBF0A56C7C3085D55" ModsDocID="2193-0074-26-1-1" checkinTime="1673408644191" checkinUser="pensoft" docAuthor="Manitkoon, Sita, Deesri, Uthumporn, Warapeang, Prapasiri, Nonsrirach, Thanit & Chanthasit, Phornphen" docDate="2023" docId="5069D8BC509D5D0BB7DC4995EE8629A5" docLanguage="en" docName="FossilRecord 26(1): 1-25" docOrigin="Fossil Record 26 (1)" docPubDate="2023-01-10" docSource="http://dx.doi.org/10.3897/fr.26.e93456" docTitle="Ratchasimasaurus suranareae Iguanodontian indet. (‘ Khok Pha Suam iguanodontian’)" docType="treatment" docVersion="1" id="31E88D0E24BE5C97B7D3DF99135E1514" lastPageNumber="1" masterDocId="31E88D0E24BE5C97B7D3DF99135E1514" masterDocTitle="Ornithischian dinosaurs in Southeast Asia: a review with palaeobiogeographic implications" masterLastPageNumber="25" masterPageNumber="1" pageNumber="1" updateTime="1673408644191" updateUser="pensoft">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Ornithischian dinosaurs in Southeast Asia: a review with palaeobiogeographic implications</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Manitkoon, Sita</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-0375-329X</mods:nameIdentifier>
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<mods:affiliation>Faculty of Science, Mahasarakham University, Khamriang, Mahasarakham, 44150, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Deesri, Uthumporn</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-6095-8654</mods:nameIdentifier>
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<mods:affiliation>Faculty of Science, Mahasarakham University, Khamriang, Mahasarakham, 44150, Thailand</mods:affiliation>
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<mods:nameIdentifier type="email">uthumporn_deesri@yahoo.com</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Warapeang, Prapasiri</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-7999-0323</mods:nameIdentifier>
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<mods:affiliation>Faculty of Science, Mahasarakham University, Khamriang, Mahasarakham, 44150, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Nonsrirach, Thanit</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-7432-628X</mods:nameIdentifier>
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<mods:affiliation>Faculty of Science, Mahasarakham University, Khamriang, Mahasarakham, 44150, Thailand</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Chanthasit, Phornphen</mods:namePart>
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<mods:affiliation>Palaeontological Research and Education Centre, Mahasarakham University, Khamriang, Mahasarakham, 44150, Thailand</mods:affiliation>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:title>Fossil Record</mods:title>
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<mods:part>
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<mods:date>2023</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2023-01-10</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>26</mods:number>
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</mods:detail>
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<mods:detail type="issue">
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<mods:number>1</mods:number>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>25</mods:end>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/fr.26.e93456</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/fr.26.e93456</mods:identifier>
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<mods:identifier type="Pensoft-Pub">2193-0074-1-1</mods:identifier>
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<treatment LSID="urn:lsid:plazi:treatment:5069D8BC509D5D0BB7DC4995EE8629A5" httpUri="http://treatment.plazi.org/id/5069D8BC509D5D0BB7DC4995EE8629A5" lastPageNumber="1" pageId="0" pageNumber="1">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="5069D8BC-509D-5D0B-B7DC-4995EE8629A5" authority="Iguanodontian indet. (' Khok Pha Suam iguanodontian')" authorityName="Iguanodontian indet. (‘ Khok Pha Suam iguanodontian’)" class="Reptilia" family="Hadrosauridae" genus="Ratchasimasaurus" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Ratchasimasaurus suranareae" order="Ornithischia" pageId="0" pageNumber="1" phylum="Chordata" rank="species" species="suranareae">
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Ratchasimasaurus suranareae Iguanodontian indet. ('Khok Pha Suam
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<normalizedToken originalValue="iguanodontian’">iguanodontian'</normalizedToken>
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)
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</taxonomicName>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Material.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Isolated teeth and postcranial material including: cervical vertebra (
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<collectingCountry name="China">PRC</collectingCountry>
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155); dorsal vertebra (SM2021-1-113) (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Exceptional specimen of ornithischian dinosaurs from Thailand. Stegosaurid vertebra (A. SM 2011 - 1 - 001), Phu Noi neornithischian left dentary (B. PRC 149), Phu Noi neornithischian articulated skeleton (C. PRC 150), Dan Luang neornithischian left femur (D. SM 2016 - 1 - 081), Psitacosaurus indet. Right femur (E. SM 2016 - 1 - 080), Psitacosaurus sattayaraki right dentary (F. SM 2016 - 1 - 163), Khok Pha Suam iguanodontian dorsal vertebra (G. SM 2021 - 1 - 113), Khok Pha Suam iguanodontian left femur (H. SM 2021 - 1 - 118), Siamodon nimngami left maxilla (I. PRC- 4), Ratchasimasaurus suranareae left dentary (J. NRRU-A 2064), Sirindhorna khoratensis left maxilla (K. NRRU-A 2048), Sirindhorna khoratensis right dentary (L. NRRU 3001 - 167); A and G in anterior view; B-D, and H-J in lateral view; E, F and L in medial view. Scale bars: 10 cm (A, C-E, G-L); 5 cm (B, F)." figureDoi="10.3897/fr.26.e93456.figure3" httpUri="https://binary.pensoft.net/fig/793761" pageId="0" pageNumber="1">3G</figureCitation>
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); proximal caudal vertebra (SM2021-1-114); distal caudal vertebrae (
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<collectingCountry name="China">PRC</collectingCountry>
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156 and SM2021-1-115); chevron (
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<collectingCountry name="China">PRC</collectingCountry>
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157); metacarpal (SM2021-1-116); left femur (SM2021-1-117) (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Exceptional specimen of ornithischian dinosaurs from Thailand. Stegosaurid vertebra (A. SM 2011 - 1 - 001), Phu Noi neornithischian left dentary (B. PRC 149), Phu Noi neornithischian articulated skeleton (C. PRC 150), Dan Luang neornithischian left femur (D. SM 2016 - 1 - 081), Psitacosaurus indet. Right femur (E. SM 2016 - 1 - 080), Psitacosaurus sattayaraki right dentary (F. SM 2016 - 1 - 163), Khok Pha Suam iguanodontian dorsal vertebra (G. SM 2021 - 1 - 113), Khok Pha Suam iguanodontian left femur (H. SM 2021 - 1 - 118), Siamodon nimngami left maxilla (I. PRC- 4), Ratchasimasaurus suranareae left dentary (J. NRRU-A 2064), Sirindhorna khoratensis left maxilla (K. NRRU-A 2048), Sirindhorna khoratensis right dentary (L. NRRU 3001 - 167); A and G in anterior view; B-D, and H-J in lateral view; E, F and L in medial view. Scale bars: 10 cm (A, C-E, G-L); 5 cm (B, F)." figureDoi="10.3897/fr.26.e93456.figure3" httpUri="https://binary.pensoft.net/fig/793761" pageId="0" pageNumber="1">3H</figureCitation>
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); right femur (SM2021-1-118); tibia (SM2021-1-119); fibula (
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<collectingCountry name="China">PRC</collectingCountry>
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158); and phalanx (SM2021-1-120).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="locality and age">
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<paragraph pageId="0" pageNumber="1">Locality and age.</paragraph>
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<paragraph pageId="0" pageNumber="1">Khok Pha Suam, Na Kham Subdistrict, Si Muang Mai District, Ubon Ratchathani Province; late Early Cretaceous Khok Kruat Formation (Aptian-Albian).</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="previous study">
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<paragraph pageId="0" pageNumber="1">Previous study.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Teeth of iguanodontians are common at Khok Pha Suam, but fragmentary (
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<bibRefCitation DOI="https://doi.org/10.3897/fr.25.83081" author="Manitkoon, S" journalOrPublisher="Fossil Record (Weinheim)" pageId="0" pageNumber="1" pagination="83 - 98" refId="B88" refString="Manitkoon, S, Deesri, U, Lauprasert, K, Warapeang, P, Nonsrirach, T, Nilpanapan, A, Wongko, K, Chanthasit, P, 2022. Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian). Fossil Record (Weinheim) 25 (1): 83 - 98, DOI: https://doi.org/10.3897/fr.25.83081" title="Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian)." url="https://doi.org/10.3897/fr.25.83081" volume="25" year="2022">Manitkoon et al. 2022</bibRefCitation>
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). Some isolated postcranial bones belonging to iguanodontians were discovered, including vertebrae and limb bones from different individuals, based on the great discrepancy in size of the left and right femur (
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<bibRefCitation DOI="https://doi.org/10.3897/fr.25.83081" author="Manitkoon, S" journalOrPublisher="Fossil Record (Weinheim)" pageId="0" pageNumber="1" pagination="83 - 98" refId="B88" refString="Manitkoon, S, Deesri, U, Lauprasert, K, Warapeang, P, Nonsrirach, T, Nilpanapan, A, Wongko, K, Chanthasit, P, 2022. Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian). Fossil Record (Weinheim) 25 (1): 83 - 98, DOI: https://doi.org/10.3897/fr.25.83081" title="Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian)." url="https://doi.org/10.3897/fr.25.83081" volume="25" year="2022">Manitkoon et al. 2022</bibRefCitation>
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;
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<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.5094.2.5" author="Samathi, A" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="301 - 320" refId="B117" refString="Samathi, A, Suteethorn, S, 2022. New materials of iguanodontians (Dinosauria: Ornithopoda) from the Lower Cretaceous Khok Kruat Formation, Ubon Ratchathani, Thailand. Zootaxa 5094 (2): 301 - 320, DOI: https://doi.org/10.11646/zootaxa.5094.2.5" title="New materials of iguanodontians (Dinosauria: Ornithopoda) from the Lower Cretaceous Khok Kruat Formation, Ubon Ratchathani, Thailand." url="https://doi.org/10.11646/zootaxa.5094.2.5" volume="5094" year="2022">Samathi and Suteethorn 2022</bibRefCitation>
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). Samathi and Suteethorn assumed that most of the Khok Pha Suam iguanodontian material belonged to a single taxon, and found its phylogenetic position to be a non-hadrosauriform styracosternan (
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<bibRefCitation DOI="https://doi.org/10.11646/zootaxa.5094.2.5" author="Samathi, A" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="301 - 320" refId="B117" refString="Samathi, A, Suteethorn, S, 2022. New materials of iguanodontians (Dinosauria: Ornithopoda) from the Lower Cretaceous Khok Kruat Formation, Ubon Ratchathani, Thailand. Zootaxa 5094 (2): 301 - 320, DOI: https://doi.org/10.11646/zootaxa.5094.2.5" title="New materials of iguanodontians (Dinosauria: Ornithopoda) from the Lower Cretaceous Khok Kruat Formation, Ubon Ratchathani, Thailand." url="https://doi.org/10.11646/zootaxa.5094.2.5" volume="5094" year="2022">Samathi and Suteethorn 2022</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="comments">
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<paragraph pageId="0" pageNumber="1">Comment.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The teeth of Thai iguanodontians exhibit a robust primary ridge displaced distally relative to the crown apicobasal axis, which is a derived feature of iguanodontians amongst ornithopods (
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<bibRefCitation DOI="https://doi.org/10.1525/california/9780520242098.003.0022" author="Norman, DB" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="1" refId="B100" refString="Norman, DB, 2004. Basal Iguanodontia. In: The Dinosauria. University of California Press, 413-437. https://doi.org/10.1525/california/9780520242098.003.0022" title="Basal Iguanodontia. In: The Dinosauria. University of California Press, 413 - 437." url="https://doi.org/10.1525/california/9780520242098.003.0022" year="2004">Norman 2004</bibRefCitation>
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,
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<bibRefCitation DOI="https://doi.org/10.1111/zoj.12193" author="Norman, DB" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="1" pagination="92 - 189" refId="B102" refString="Norman, DB, 2014. On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna). Zoological Journal of the Linnean Society 173 (1): 92 - 189, DOI: https://doi.org/10.1111/zoj.12193" title="On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna)." url="https://doi.org/10.1111/zoj.12193" volume="173" year="2014">2014</bibRefCitation>
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). They also possess mammillate marginal denticles, which is a synapomorphy of taxa closer to hadrosaurids than basal ankylopollexians, such as
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<taxonomicName authorityName="Marsh" authorityYear="1885" class="Reptilia" family="Camptosauridae" genus="Camptosaurus" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Camptosaurus" order="Ornithischia" pageId="0" pageNumber="1" phylum="Chordata" rank="genus">
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<emphasis italics="true" pageId="0" pageNumber="1">Camptosaurus</emphasis>
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</taxonomicName>
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(
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<bibRefCitation DOI="https://doi.org/10.1016/j.cretres.2015.12.008" author="Fanti, F" journalOrPublisher="Cretaceous Research" pageId="0" pageNumber="1" pagination="267 - 274" refId="B55" refString="Fanti, F, Cau, A, Panzarin, L, Cantelli, L, 2016. Evidence of iguanodontian dinosaurs from the Lower Cretaceous of Tunisia. Cretaceous Research 60: 267 - 274, DOI: https://doi.org/10.1016/j.cretres.2015.12.008" title="Evidence of iguanodontian dinosaurs from the Lower Cretaceous of Tunisia." url="https://doi.org/10.1016/j.cretres.2015.12.008" volume="60" year="2016">Fanti et al. 2016</bibRefCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The maxillary teeth of Thai forms, including
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<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
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<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
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</taxonomicName>
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(Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8A</figureCitation>
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),
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<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
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<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
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</taxonomicName>
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(Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8C</figureCitation>
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), and the Khok Pha Suam taxon (Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8E</figureCitation>
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), are diagnostic of the level of ankylopollexian iguanodontian by displaying the prominent primary ridge, accessory ridges, and the vertical channels marking the positions occupied by successional tooth crowns (
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<bibRefCitation DOI="https://doi.org/10.1111/zoj.12193" author="Norman, DB" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="1" pagination="92 - 189" refId="B102" refString="Norman, DB, 2014. On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna). Zoological Journal of the Linnean Society 173 (1): 92 - 189, DOI: https://doi.org/10.1111/zoj.12193" title="On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna)." url="https://doi.org/10.1111/zoj.12193" volume="173" year="2014">Norman 2014</bibRefCitation>
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). The different maxillary teeth characteristics are as follows:
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<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
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<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
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</taxonomicName>
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: lanceolate-shaped crown, primary ridge separates the labial surface unevenly, distal portion of the labial surface bears weak subsidiary ridges and is slightly broader than the mesial portion (
|
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<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0145904" author="Shibata, M" journalOrPublisher="Acta Geologica Sinica - English Edition" pageId="0" pageNumber="1" refId="B125" refString="Shibata, M, Jintasakul, P, Azuma, Y, You, H-L, 2015. A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10(12): e0145904. https://doi.org/10.1371/journal.pone.0145904" title="A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10 (12): e 0145904." url="https://doi.org/10.1371/journal.pone.0145904" year="2015">Shibata et al. 2015</bibRefCitation>
|
||
);
|
||
<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
|
||
</taxonomicName>
|
||
: diamond-shaped crown, primary ridge in a median position, no/one short weak accessory ridge is present in what is presumably the mesial half of the crown, in the apical part. (
|
||
<bibRefCitation DOI="https://doi.org/10.1016/j.annpal.2011.08.001" author="Buffetaut, E" journalOrPublisher="Annales de Paleontologie" pageId="0" pageNumber="1" pagination="51 - 62" refId="B21" refString="Buffetaut, E, Suteethorn, V, 2011. A new iguanodontian dinosaur from the Khok Kruat Formation (Early Cretaceous, Aptian) of northeastern Thailand. Annales de Paleontologie 97 (1-2): 51 - 62, DOI: https://doi.org/10.1016/j.annpal.2011.08.001" title="A new iguanodontian dinosaur from the Khok Kruat Formation (Early Cretaceous, Aptian) of northeastern Thailand." url="https://doi.org/10.1016/j.annpal.2011.08.001" volume="97" year="2011">Buffetaut and Suteethorn 2011</bibRefCitation>
|
||
); Khok Pha Suam iguanodontian: possibly diamond-shaped crown, primary ridge divides the crown into two asymmetrical halves, at least four weak accessory ridges in what is presumably the mesial portion along the apicobasal axis. The more derived hadrosauroids usually lose the accessory ridges on the crowns of maxillary teeth, and show a shifting of the primary ridge on the maxillary tooth crown to the mid-line (
|
||
<bibRefCitation DOI="https://doi.org/10.1016/S0195-6671(03)00048-X" author="You, HL" journalOrPublisher="Cretaceous Research" pageId="0" pageNumber="1" pagination="347 - 355" refId="B158" refString="You, HL, Luo, ZX, Shubin, NH, Witmer, LM, Tang, ZL, Tang, F, 2003. The earliest-known duck-billed dinosaur from deposits of late Early Cretaceous age in northwest China and hadrosaur evolution. Cretaceous Research 24 (3): 347 - 355, DOI: https://doi.org/10.1016/S0195-6671(03)00048-X" title="The earliest-known duck-billed dinosaur from deposits of late Early Cretaceous age in northwest China and hadrosaur evolution." url="https://doi.org/10.1016/S0195-6671(03)00048-X" volume="24" year="2003">You et al. 2003</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<caption doi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1" start="Figure 8" startId="F8">
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" pageId="0" pageNumber="1">Figure 8.</emphasis>
|
||
Isolated Thai iguanodontian teeth;
|
||
<taxonomicName family="Hadrosauridae" genus="Sirindhorna" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Sirindhorna khoratensis" order="Ornithischia" pageId="0" pageNumber="1" phylum="Chordata" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Sirindhorna khoratensis</emphasis>
|
||
</taxonomicName>
|
||
maxillary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A, B.</emphasis>
|
||
NRRU-A1959) and dentary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">G, H.</emphasis>
|
||
NRRU3001-28);
|
||
<taxonomicName class="Reptilia" family="Hadrosauridae" genus="Siamodon" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Siamodon nomngami" order="Ornithischia" pageId="0" pageNumber="1" phylum="Chordata" rank="species" species="nomngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Siamodon nomngami</emphasis>
|
||
</taxonomicName>
|
||
maxillary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">C, D.</emphasis>
|
||
PRC-5) and dentary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">I, J.</emphasis>
|
||
WNM-Sp-001); Khok Pha Suam iguanodontian maxillary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">E, F.</emphasis>
|
||
SM2021-1-122) and dentary tooth (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">K, L.</emphasis>
|
||
SM2021-1-121). In labial (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A, C, E</emphasis>
|
||
), mesial (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B, D, F</emphasis>
|
||
), lingual (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">G, I, K</emphasis>
|
||
), and distal (
|
||
<emphasis bold="true" pageId="0" pageNumber="1">H, J, L</emphasis>
|
||
) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from
|
||
<bibRefCitation DOI="https://doi.org/10.1016/j.annpal.2011.08.001" author="Buffetaut, E" journalOrPublisher="Annales de Paleontologie" pageId="0" pageNumber="1" pagination="51 - 62" refId="B21" refString="Buffetaut, E, Suteethorn, V, 2011. A new iguanodontian dinosaur from the Khok Kruat Formation (Early Cretaceous, Aptian) of northeastern Thailand. Annales de Paleontologie 97 (1-2): 51 - 62, DOI: https://doi.org/10.1016/j.annpal.2011.08.001" title="A new iguanodontian dinosaur from the Khok Kruat Formation (Early Cretaceous, Aptian) of northeastern Thailand." url="https://doi.org/10.1016/j.annpal.2011.08.001" volume="97" year="2011">Buffetaut and Suteethorn (2011)</bibRefCitation>
|
||
;
|
||
<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0145904" author="Shibata, M" journalOrPublisher="Acta Geologica Sinica - English Edition" pageId="0" pageNumber="1" refId="B125" refString="Shibata, M, Jintasakul, P, Azuma, Y, You, H-L, 2015. A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10(12): e0145904. https://doi.org/10.1371/journal.pone.0145904" title="A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10 (12): e 0145904." url="https://doi.org/10.1371/journal.pone.0145904" year="2015">Shibata et al. (2015)</bibRefCitation>
|
||
;
|
||
<bibRefCitation DOI="https://doi.org/10.3897/fr.25.83081" author="Manitkoon, S" journalOrPublisher="Fossil Record (Weinheim)" pageId="0" pageNumber="1" pagination="83 - 98" refId="B88" refString="Manitkoon, S, Deesri, U, Lauprasert, K, Warapeang, P, Nonsrirach, T, Nilpanapan, A, Wongko, K, Chanthasit, P, 2022. Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian). Fossil Record (Weinheim) 25 (1): 83 - 98, DOI: https://doi.org/10.3897/fr.25.83081" title="Fossil assemblage from the Khok Pha Suam locality of northeastern, Thailand: An overview of vertebrate diversity from the Early Cretaceous Khok Kruat Formation (Aptian-Albian)." url="https://doi.org/10.3897/fr.25.83081" volume="25" year="2022">Manitkoon et al. (2022)</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The dentary teeth of the Thai forms, including
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8B</figureCitation>
|
||
),
|
||
<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
|
||
</taxonomicName>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8D</figureCitation>
|
||
), and Khok Pha Suam taxon (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A 1959) and dentary tooth (G, H. NRRU 3001 - 28); Siamodon nomngami maxillary tooth (C, D. PRC- 5) and dentary tooth (I, J. WNM-Sp- 001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM 2021 - 1 - 122) and dentary tooth (K, L. SM 2021 - 1 - 121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022))." figureDoi="10.3897/fr.26.e93456.figure8" httpUri="https://binary.pensoft.net/fig/793766" pageId="0" pageNumber="1">8F</figureCitation>
|
||
) (not preserved in
|
||
<taxonomicName lsidName="R. suranareae" pageId="0" pageNumber="1" rank="species" species="suranareae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">R. suranareae</emphasis>
|
||
</taxonomicName>
|
||
) possess a prominent primary ridge. The crowns allowed the teeth to interlock, resulting in the more elaborate structure of the dental battery. The different characteristics are as follow:
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
: wide with leaf-shaped crown, the secondary ridge is positioned mesial to and is less prominent than the primary ridge, with no other accessory ridges (
|
||
<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0145904" author="Shibata, M" journalOrPublisher="Acta Geologica Sinica - English Edition" pageId="0" pageNumber="1" refId="B125" refString="Shibata, M, Jintasakul, P, Azuma, Y, You, H-L, 2015. A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10(12): e0145904. https://doi.org/10.1371/journal.pone.0145904" title="A New Basal Hadrosauroid Dinosaur from the Lower Cretaceous Khok Kruat Formation in Nakhon Ratchasima Province, Northeastern Thailand. PLoS ONE 10 (12): e 0145904." url="https://doi.org/10.1371/journal.pone.0145904" year="2015">Shibata et al. 2015</bibRefCitation>
|
||
);
|
||
<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
|
||
</taxonomicName>
|
||
: leaf-shaped crown, the secondary ridge is positioned mesial to and is less prominent than the primary ridge, at least one faint accessory ridge is present on the mesial side, crown appears to be curved apicobasally; Khok Pha Suam iguanodontian: leaf-shaped crown, the less prominent secondary ridge is positioned mesial to and is less prominent than the primary ridge and at least two weak accessory ridges are present on the mesial and the distal portion. The dentary teeth of
|
||
<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
|
||
</taxonomicName>
|
||
and the Khok Pha Suam iguanodontian show accessory ridges, which are absent in
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
. This character appeared in basal hadrosauroids (
|
||
<bibRefCitation DOI="https://doi.org/10.7717/peerj.1872" author="Prieto-Marquez, A" journalOrPublisher="Vertebrata PalAsiatica" pageId="0" pageNumber="1" refId="B107" refString="Prieto-Marquez, A, Erickson, GM, Ebersole, JA, 2016. Anatomy and Osteohistology of the basal hadrosaurid dinosaur Eotrachodon from the uppermost Santonian (Cretaceous) of southern appalachia. PeerJ 4: e1872. https://doi.org/10.7717/peerj.1872" title="Anatomy and Osteohistology of the basal hadrosaurid dinosaur Eotrachodon from the uppermost Santonian (Cretaceous) of southern appalachia. PeerJ 4: e 1872." url="https://doi.org/10.7717/peerj.1872" year="2016">
|
||
<normalizedToken originalValue="Prieto-Márquez">Prieto-Marquez</normalizedToken>
|
||
et al. 2016
|
||
</bibRefCitation>
|
||
). In this respect,
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
is probably more advanced than
|
||
<taxonomicName lsidName="S. nimngami" pageId="0" pageNumber="1" rank="species" species="nimngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. nimngami</emphasis>
|
||
</taxonomicName>
|
||
and the Khok Pha Suam iguanodontian.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
So far, three taxa of styracosternan iguanodontians, including
|
||
<taxonomicName lsidName="S. ninngami" pageId="0" pageNumber="1" rank="species" species="ninngami">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. ninngami</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName lsidName="R. suranareae" pageId="0" pageNumber="1" rank="species" species="suranareae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">R. suranareae</emphasis>
|
||
</taxonomicName>
|
||
, and
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
, have been described from the Khok Kruat Formation in Nakhon Ratchasima Province plus one Laotian taxon "
|
||
<taxonomicName lsidName="M. laosensis" pageId="0" pageNumber="1" rank="species" species="laosensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">M. laosensis</emphasis>
|
||
</taxonomicName>
|
||
" from the
|
||
<normalizedToken originalValue="Grès">Gres</normalizedToken>
|
||
<normalizedToken originalValue="Supérieurs">Superieurs</normalizedToken>
|
||
Formation of Laos. If Khok Pha Suam iguanodontian is one of the previously-named taxa from Nakhon Ratchasima, this would provide a geographic distribution of about 400 km to the far east (Fig.
|
||
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Southeast Asia map showing the distribution of Jurassic-Cretaceous non-marine sediments in Southeast Asia (modified from CCOP's 1: 2 million Geologic map of East and Southeast Asia), Number in circles = rock formations: 1, Lower Phu Kradung; 2, Upper Phu Kradung; 3, Phra Wihan; 4,? Tembling Group; 5, Gagau Group; 6, Khok Kruat; 7, Gres Superieurs; 8, Xinlong (Thanh and Khuc 2006; Department of Mineral Resources 2014; Uchida et al. 2017; Teng et al. 2019; Yan et al. 2019)." figureDoi="10.3897/fr.26.e93456.figure1" httpUri="https://binary.pensoft.net/fig/793759" pageId="0" pageNumber="1">1</figureCitation>
|
||
). However, the Khok Pha Suam locality is closer to Savannakhet than Nakhon Ratchasima. The comparison between them has to be very careful, and overlapping elements are required. It would be significant if the Khok Pha Suam iguanodont is a new taxon, as it would mean that there was a diversity of up to five to six species in the region. It is necessary to compare the postcranial material between the Khok Pha Suam taxon and
|
||
<taxonomicName lsidName="S. khoratensis" pageId="0" pageNumber="1" rank="species" species="khoratensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. khoratensis</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
If a high diversity in iguanodontians is present in Southeast Asia, then careful consideration and more materials will be required. This may be similar to the case of
|
||
<taxonomicName authorityName="Lambe" authorityYear="1917" class="Reptilia" family="Hadrosauridae" genus="Edmontosaurus" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Edmontosaurus" order="Ornithischia" pageId="0" pageNumber="1" phylum="Chordata" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Edmontosaurus</emphasis>
|
||
</taxonomicName>
|
||
, the duck-billed edmontosaurine that was widely distributed in the Late Cretaceous (Campanian-Maastrichtian) ranging from Colorado to Alaska of North America, where several genera were consolidated into two species under a single genus, based on ontogenetic variation, morphometrics and several other factors (
|
||
<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0025186" author="Campione, NE" journalOrPublisher="Tectonophysics" pageId="0" pageNumber="1" refId="B38" refString="Campione, NE, Evans, DC, 2011. Cranial growth and variation in edmontosaurs (Dinosauria: Hadrosauridae): Implications for latest cretaceous megaherbivore diversity in North America. PLoS ONE 6(9): e25186. https://doi.org/10.1371/journal.pone.0025186" title="Cranial growth and variation in edmontosaurs (Dinosauria: Hadrosauridae): Implications for latest cretaceous megaherbivore diversity in North America. PLoS ONE 6 (9): e 25186." url="https://doi.org/10.1371/journal.pone.0025186" year="2011">Campione and Evans 2011</bibRefCitation>
|
||
;
|
||
<bibRefCitation DOI="https://doi.org/10.1371/journal.pone.0232410" author="Takasaki, R" journalOrPublisher="Acta Palaeontologica Polonica" pageId="0" pageNumber="1" refId="B133" refString="Takasaki, R, Fiorillo, AR, Tykoski, RS, Kobayashi, Y, 2020. Re-examination of the cranial osteology of the Arctic Alaskan hadrosaurine with implications for its taxonomic status. PLoS ONE 15(5): e0232410. https://doi.org/10.1371/journal.pone.0232410" title="Re-examination of the cranial osteology of the Arctic Alaskan hadrosaurine with implications for its taxonomic status. PLoS ONE 15 (5): e 0232410." url="https://doi.org/10.1371/journal.pone.0232410" year="2020">Takasaki et al. 2020</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |