A reappraisal of Polyptychodon (Plesiosauria) from the Cretaceous of England
Identifieur interne : 000013 ( Pmc/Checkpoint ); précédent : 000012; suivant : 000014A reappraisal of Polyptychodon (Plesiosauria) from the Cretaceous of England
Auteurs : Daniel MadziaSource :
- PeerJ [ 2167-8359 ] ; 2016.
Abstract
Pliosauridae is a globally distributed clade of aquatic predatory amniotes whose fossil record spans from the Lower Jurassic to the Upper Cretaceous. However, the knowledge of pliosaurid interrelationships remains limited. In part, this is a consequence of a few key taxa awaiting detailed reassessment. Among them, the taxon
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DOI: 10.7717/peerj.1998
PubMed: 27190712
PubMed Central: 4867712
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">A reappraisal of <italic>Polyptychodon</italic> (Plesiosauria) from the Cretaceous of England</title><author><name sortKey="Madzia, Daniel" sort="Madzia, Daniel" uniqKey="Madzia D" first="Daniel" last="Madzia">Daniel Madzia</name><affiliation><nlm:aff id="aff-1"></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27190712</idno><idno type="pmc">4867712</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4867712</idno><idno type="RBID">PMC:4867712</idno><idno type="doi">10.7717/peerj.1998</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000021</idno><idno type="wicri:Area/Pmc/Curation">000021</idno><idno type="wicri:Area/Pmc/Checkpoint">000013</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">A reappraisal of <italic>Polyptychodon</italic> (Plesiosauria) from the Cretaceous of England</title><author><name sortKey="Madzia, Daniel" sort="Madzia, Daniel" uniqKey="Madzia D" first="Daniel" last="Madzia">Daniel Madzia</name><affiliation><nlm:aff id="aff-1"></nlm:aff></affiliation></author></analytic><series><title level="j">PeerJ</title><idno type="eISSN">2167-8359</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Pliosauridae is a globally distributed clade of aquatic predatory amniotes whose fossil record spans from the Lower Jurassic to the Upper Cretaceous. However, the knowledge of pliosaurid interrelationships remains limited. In part, this is a consequence of a few key taxa awaiting detailed reassessment. Among them, the taxon <italic>Polyptychodon</italic> is of special importance. It was established on isolated teeth from the mid-Cretaceous strata of East and South East England and subsequently associated with numerous finds of near-cosmopolitan distribution. Here the taxon is reassessed based on the original dental material from England, with special focus on a large collection of late Albian material from the Cambridge Greensand near Cambridge. The dental material is reviewed here from historical and stratigraphic perspective, described in detail, and discussed in terms of its diagnostic nature. The considerable morphological variability observed in the teeth attributed to <italic>Polyptychodon</italic>, together with a wide stratigraphic range of the ascribed material, possibly exceeding 35 Ma (early Aptian to ?middle Santonian), suggests that the taxon is based on a multispecies assemblage, possibly incorporating members of different plesiosaur clades. Due to the absence of any autapomorphic characters or unique character combinations in the original material, <italic>Polyptychodon interruptus</italic>, the type species of <italic>Polyptychodon</italic>, is considered <italic>nomen dubium</italic>. From a global perspective, <italic>Polyptychodon</italic> is viewed as a wastebasket taxon whose material originating from different localities should be reconsidered separately.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Albright, Bl" uniqKey="Albright B">BL Albright</name></author><author><name sortKey="Gillette, Dd" uniqKey="Gillette D">DD Gillette</name></author><author><name sortKey="Titus, Al" uniqKey="Titus A">AL Titus</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ameghino, F" uniqKey="Ameghino F">F Ameghino</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Amedro, F" uniqKey="Amedro F">F Amédro</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Angst, D" uniqKey="Angst D">D Angst</name></author><author><name sortKey="Bardet, N" uniqKey="Bardet N">N 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article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">PeerJ</journal-id><journal-id journal-id-type="iso-abbrev">PeerJ</journal-id><journal-id journal-id-type="pmc">PeerJ</journal-id><journal-id journal-id-type="publisher-id">PeerJ</journal-id><journal-title-group><journal-title>PeerJ</journal-title></journal-title-group><issn pub-type="epub">2167-8359</issn><publisher><publisher-name>PeerJ Inc.</publisher-name><publisher-loc>San Francisco, USA</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27190712</article-id><article-id pub-id-type="pmc">4867712</article-id><article-id pub-id-type="publisher-id">1998</article-id><article-id pub-id-type="doi">10.7717/peerj.1998</article-id><article-categories><subj-group subj-group-type="heading"><subject>Paleontology</subject></subj-group><subj-group subj-group-type="heading"><subject>Taxonomy</subject></subj-group></article-categories><title-group><article-title>A reappraisal of <italic>Polyptychodon</italic> (Plesiosauria) from the Cretaceous of England</article-title></title-group><contrib-group><contrib id="author-1" contrib-type="author" corresp="yes"><name><surname>Madzia</surname><given-names>Daniel</given-names></name><xref ref-type="aff" rid="aff-1"></xref><email>daniel.madzia@gmail.com</email></contrib><aff id="aff-1"><institution>Institute of Paleobiology, Polish Academy of Sciences</institution>,<addr-line>Warsaw</addr-line>,<country>Poland</country></aff></contrib-group><contrib-group><contrib id="editor-1" contrib-type="editor"><name><surname>Young</surname><given-names>Mark</given-names></name></contrib></contrib-group><pub-date pub-type="epub" date-type="pub" iso-8601-date="2016-05-10"><day>10</day><month>5</month><year iso-8601-date="2016">2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>4</volume><elocation-id>e1998</elocation-id><history><date date-type="received" iso-8601-date="2016-02-25"><day>25</day><month>2</month><year iso-8601-date="2016">2016</year></date><date date-type="accepted" iso-8601-date="2016-04-11"><day>11</day><month>4</month><year iso-8601-date="2016">2016</year></date></history><permissions><copyright-statement>©2016 Madzia</copyright-statement><copyright-year>2016</copyright-year><copyright-holder>Madzia</copyright-holder><license xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.</license-p></license></permissions><self-uri xlink:href="https://peerj.com/articles/1998"></self-uri><abstract><p>Pliosauridae is a globally distributed clade of aquatic predatory amniotes whose fossil record spans from the Lower Jurassic to the Upper Cretaceous. However, the knowledge of pliosaurid interrelationships remains limited. In part, this is a consequence of a few key taxa awaiting detailed reassessment. Among them, the taxon <italic>Polyptychodon</italic> is of special importance. It was established on isolated teeth from the mid-Cretaceous strata of East and South East England and subsequently associated with numerous finds of near-cosmopolitan distribution. Here the taxon is reassessed based on the original dental material from England, with special focus on a large collection of late Albian material from the Cambridge Greensand near Cambridge. The dental material is reviewed here from historical and stratigraphic perspective, described in detail, and discussed in terms of its diagnostic nature. The considerable morphological variability observed in the teeth attributed to <italic>Polyptychodon</italic>, together with a wide stratigraphic range of the ascribed material, possibly exceeding 35 Ma (early Aptian to ?middle Santonian), suggests that the taxon is based on a multispecies assemblage, possibly incorporating members of different plesiosaur clades. Due to the absence of any autapomorphic characters or unique character combinations in the original material, <italic>Polyptychodon interruptus</italic>, the type species of <italic>Polyptychodon</italic>, is considered <italic>nomen dubium</italic>. From a global perspective, <italic>Polyptychodon</italic> is viewed as a wastebasket taxon whose material originating from different localities should be reconsidered separately.</p></abstract><kwd-group kwd-group-type="author"><kwd><italic>Polyptychodon</italic></kwd><kwd>Plesiosauria</kwd><kwd>Pliosauridae</kwd><kwd>Cretaceous</kwd><kwd>Teeth</kwd><kwd>Cambridge Greensand</kwd><kwd>England</kwd></kwd-group><funding-group><award-group id="fund-1"><funding-source>National Science Centre (Poland)</funding-source><award-id>DEC-2012/05/B/ST10/00710</award-id></award-group><funding-statement>The study was funded by the National Science Centre (Poland) grant DEC-2012/05/B/ST10/00710 to Marcin Machalski (Institute of Paleobiology, Polish Academy of Sciences). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.</funding-statement></funding-group></article-meta></front></pmc><affiliations><list></list><tree><noCountry><name sortKey="Madzia, Daniel" sort="Madzia, Daniel" uniqKey="Madzia D" first="Daniel" last="Madzia">Daniel Madzia</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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