A new tyrannosaurine (Theropoda:Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids

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dc.contributor.authorVoris, Jared Thomas
dc.contributor.authorTherrien, Francois
dc.contributor.authorZelenitsky, Darla Karen
dc.contributor.authorBrown, Caleb Marshall
dc.date.accessioned2023-10-26T21:51:29Z
dc.date.available2023-10-26T21:51:29Z
dc.date.issued2020-01-23
dc.description.abstractUpper Cretaceous tyrannosauroid material from North America was primarily known from upper Campanian through Maastrichtian formations until the recent discovery of derived tyrannosaurid taxa from lower-to-mid Campanian deposits in the southwestern United States. However, diagnostic material from contemporaneous deposits further north in Alberta (Canada) and Montana (USA) has yet to be documented. Here we report the discovery of a new tyrannosaurine tyrannosaurid from the mid- Campanian Foremost Formation of Alberta, Thanatotheristes degrootorum gen. et. sp. nov, which helps fill this gap. The new tyrannosaurine, diagnosed by five autapomorphies, is found to be the sister taxon to the late Campanian genus Daspletosaurus. Thanatotheristes is distinct from Daspletosaurus based on several features, and lacks at least two apomorphies of the latter taxon. Together, these taxa form the newly established Daspletosaurini, a clade of long-, deep-snouted tyrannosaurines endemic to northern Laramidia during the Campanian. Our study demonstrates that Tyrannosauridae is composed of several geographically-segregated clades rather than a series of monogeneric successive sister taxa as recovered by previous studies. The geographic segregation of tyrannosaurid clades within North America provides renewed evidence for provinciality among large theropods during the Late Cretaceous.
dc.description.grantingagencyNatural Sciences and Engineering Research Council (NSERC)
dc.identifier.citationVoris, J. T., Therrien, F., Zelenitsky, D. K., & Brown, C. M. (2020). A new tyrannosaurine (Theropoda:Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids. Cretaceous Research, 110, 104388. https://doi.org/10.1016/j.cretres.2020.104388
dc.identifier.doihttps://doi.org/10.1016/j.cretres.2020.104388
dc.identifier.grantnumberRGPIN/327513
dc.identifier.urihttps://hdl.handle.net/1880/117335
dc.language.isoenen
dc.publisherCretaceous Research (Elsevier)
dc.publisher.facultyScienceen
dc.publisher.hasversionacceptedVersion
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.policyhttps://www.elsevier.com/about/policies/sharing
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en
dc.subjectTheropoda
dc.subjectTyrannosauridae
dc.subjectCampanian
dc.subjectEvolution
dc.subjectProvinciality
dc.subjectBiogeography
dc.titleA new tyrannosaurine (Theropoda:Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids
dc.typeArticle
ucalgary.scholar.levelGraduate, Faculty, Researcher
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