A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Identifieur interne : 000F35 ( Istex/Corpus ); précédent : 000F34; suivant : 000F36A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Auteurs : Caleb Marshall Brown ; Clint A. Boyd ; Anthony P. RussellSource :
- Zoological Journal of the Linnean Society [ 0024-4082 ] ; 2011-12.
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- KwdEn :
Abstract
A small, articulated basal ornithopod skeleton from the Frenchman Formation (late Maastrichtian) of Saskatchewan (RSM P 1225.1), previously referred to the taxon Thescelosaurus, differs from both recognized species of this taxon (Thescelosaurus neglectus and Thescelosaurus garbanii). The differences are taxonomically informative and we recognize this specimen as the holotype of a new species, Thescelosaurus assiniboiensis sp. nov., diagnosed by the presence of two autapomorphies, and displaying plesiomorphic traits more similar to those of Parksosaurus, than to those of the other Thescelosaurus species. The Frenchman Formation also harbours an intriguing faunal assemblage in which Thescelosaurus represents one of the most abundant dinosaur taxa, and preserves a relatively high proportion of small (putatively juvenile and subadult) specimens of many dinosaur taxa. Further work that increases the faunal sample from this formation, and that permits quantitative comparisons with contemporary formations, will determine whether or not these differences are well supported, and will determine their ultimate palaeobiological significance. Identification of a third species of Thescelosaurus from the late Maastrichtian of North America suggests that this taxon was more diverse than previously recognized, and shows an increase in diversity from the Campanian through the late Maastrichtian, contrasting the trends seen in most other ornithischian clades.
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DOI: 10.1111/j.1096-3642.2011.00735.x
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Identification of a third species of Thescelosaurus from the late Maastrichtian of North America suggests that this taxon was more diverse than previously recognized, and shows an increase in diversity from the Campanian through the late Maastrichtian, contrasting the trends seen in most other ornithischian clades.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>CALEB MARSHALL BROWN</name><affiliations><json:string>Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada</json:string><json:string>E-mail: caleb.brown@utoronto.ca</json:string></affiliations></json:item><json:item><name>CLINT A. BOYD</name><affiliations><json:string>Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, USA</json:string></affiliations></json:item><json:item><name>ANTHONY P. 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The differences are taxonomically informative and we recognize this specimen as the holotype of a new species, Thescelosaurus assiniboiensis sp. nov., diagnosed by the presence of two autapomorphies, and displaying plesiomorphic traits more similar to those of Parksosaurus, than to those of the other Thescelosaurus species. The Frenchman Formation also harbours an intriguing faunal assemblage in which Thescelosaurus represents one of the most abundant dinosaur taxa, and preserves a relatively high proportion of small (putatively juvenile and subadult) specimens of many dinosaur taxa. Further work that increases the faunal sample from this formation, and that permits quantitative comparisons with contemporary formations, will determine whether or not these differences are well supported, and will determine their ultimate palaeobiological significance. Identification of a third species of Thescelosaurus from the late Maastrichtian of North America suggests that this taxon was more diverse than previously recognized, and shows an increase in diversity from the Campanian through the late Maastrichtian, contrasting the trends seen in most other ornithischian clades.</p></abstract><abstract><p>© 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 163, 1157–1198.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>Thescelosaurus</term></item><item><term>Parksosaurus</term></item><item><term>Cretaceous</term></item><item><term>Systematics</term></item><item><term>Osteology</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2011-12">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/82C71127EF59D673FE2B2E47E78D6D1823E1E7EE/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1096-3642</doi><issn type="print">0024-4082</issn><issn type="electronic">1096-3642</issn><idGroup><id type="product" value="ZOJ"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY">Zoological Journal of the Linnean Society</title></titleGroup></publicationMeta><publicationMeta level="part" position="12104"><doi origin="wiley">10.1111/zoj.2011.163.issue-4</doi><numberingGroup><numbering type="journalVolume" number="163">163</numbering><numbering type="journalIssue" number="4">4</numbering></numberingGroup><coverDate startDate="2011-12">December 2011</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="7" status="forIssue"><doi origin="wiley">10.1111/j.1096-3642.2011.00735.x</doi><idGroup><id type="unit" value="ZOJ735"></id></idGroup><countGroup><count type="pageTotal" number="42"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><copyright>© 2011 The Linnean Society of London</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:3.0 mode:FullText" date="2011-11-25"></event><event type="firstOnline" date="2011-11-25"></event><event type="publishedOnlineFinalForm" date="2011-11-25"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-11"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-11-04"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="1157">1157</numbering><numbering type="pageLast" number="1198">1198</numbering></numberingGroup><correspondenceTo> Current address: Department of Ecology and Evolutionary Biology, University of Toronto. 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The differences are taxonomically informative and we recognize this specimen as the holotype of a new species, <b><i>Thescelosaurus assiniboiensis</i> sp. nov.</b>, diagnosed by the presence of two autapomorphies, and displaying plesiomorphic traits more similar to those of <i>Parksosaurus</i>, than to those of the other <i>Thescelosaurus</i> species. The Frenchman Formation also harbours an intriguing faunal assemblage in which <i>Thescelosaurus</i> represents one of the most abundant dinosaur taxa, and preserves a relatively high proportion of small (putatively juvenile and subadult) specimens of many dinosaur taxa. Further work that increases the faunal sample from this formation, and that permits quantitative comparisons with contemporary formations, will determine whether or not these differences are well supported, and will determine their ultimate palaeobiological significance. Identification of a third species of <i>Thescelosaurus</i> from the late Maastrichtian of North America suggests that this taxon was more diverse than previously recognized, and shows an increase in diversity from the Campanian through the late Maastrichtian, contrasting the trends seen in most other ornithischian clades.</p><p>© 2011 The Linnean Society of London, <i>Zoological Journal of the Linnean Society</i>, 2011, <b>163</b>, 1157–1198.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>A NEW THESCELOSAUR</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America</title></titleInfo><name type="personal"><namePart type="given">CALEB MARSHALL</namePart><namePart type="family">BROWN</namePart><affiliation>Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada</affiliation><affiliation>E-mail: caleb.brown@utoronto.ca</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">CLINT A.</namePart><namePart type="family">BOYD</namePart><affiliation>Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">ANTHONY P.</namePart><namePart type="family">RUSSELL</namePart><namePart type="termsOfAddress">FLS</namePart><affiliation>Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2011-12</dateIssued><edition>Received 5 November 2010; revised 20 January 2011; accepted for publication 24 January 2011</edition><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">24</extent><extent unit="references">106</extent><extent unit="words">25280</extent></physicalDescription><abstract>A small, articulated basal ornithopod skeleton from the Frenchman Formation (late Maastrichtian) of Saskatchewan (RSM P 1225.1), previously referred to the taxon Thescelosaurus, differs from both recognized species of this taxon (Thescelosaurus neglectus and Thescelosaurus garbanii). The differences are taxonomically informative and we recognize this specimen as the holotype of a new species, Thescelosaurus assiniboiensis sp. nov., diagnosed by the presence of two autapomorphies, and displaying plesiomorphic traits more similar to those of Parksosaurus, than to those of the other Thescelosaurus species. The Frenchman Formation also harbours an intriguing faunal assemblage in which Thescelosaurus represents one of the most abundant dinosaur taxa, and preserves a relatively high proportion of small (putatively juvenile and subadult) specimens of many dinosaur taxa. Further work that increases the faunal sample from this formation, and that permits quantitative comparisons with contemporary formations, will determine whether or not these differences are well supported, and will determine their ultimate palaeobiological significance. Identification of a third species of Thescelosaurus from the late Maastrichtian of North America suggests that this taxon was more diverse than previously recognized, and shows an increase in diversity from the Campanian through the late Maastrichtian, contrasting the trends seen in most other ornithischian clades.</abstract><abstract>© 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 163, 1157–1198.</abstract><subject lang="en"><genre>keywords</genre><topic>Thescelosaurus</topic><topic>Parksosaurus</topic><topic>Cretaceous</topic><topic>Systematics</topic><topic>Osteology</topic></subject><relatedItem type="host"><titleInfo><title>Zoological Journal of the Linnean Society</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0024-4082</identifier><identifier type="eISSN">1096-3642</identifier><identifier type="DOI">10.1111/(ISSN)1096-3642</identifier><identifier type="PublisherID">ZOJ</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>163</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>1157</start><end>1198</end><total>42</total></extent></part></relatedItem><identifier type="istex">82C71127EF59D673FE2B2E47E78D6D1823E1E7EE</identifier><identifier type="DOI">10.1111/j.1096-3642.2011.00735.x</identifier><identifier type="ArticleID">ZOJ735</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 The Linnean Society of London</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
}}
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