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A New Rhynchosaur (Reptilia, Archosauromorpha) from the Upper Triassic of Eastern North America

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dc.contributor.author Sues, Hans-Dieter en
dc.contributor.author Fitch, Adam J. en
dc.contributor.author Whatley, Robin L. en
dc.date.accessioned 2020-08-21T02:02:53Z
dc.date.available 2020-08-21T02:02:53Z
dc.date.issued 2020
dc.identifier.citation Sues, Hans-Dieter, Fitch, Adam J., and Whatley, Robin L. 2020. "<a href="https://www.tandfonline.com/doi/full/10.1080/02724634.2020.1771568?scroll=top&needAccess=true">A New Rhynchosaur (Reptilia, Archosauromorpha) from the Upper Triassic of Eastern North America</a>." <em>Journal of Vertebrate Paleontology</em>. Article e1771568. <a href="https://doi.org/10.1080/02724634.2020.1771568">https://doi.org/10.1080/02724634.2020.1771568</a> en
dc.identifier.issn 0272-4634
dc.identifier.uri https://hdl.handle.net/10088/106875
dc.description.abstract This paper provides a description and analysis of cranial remains of a rhynchosaur from the Upper Triassic Evangeline Member of the Wolfville Formation of Nova Scotia, Canada. This material, primarily comprising jaw elements, represents the first definitive record of Late Triassic rhynchosaurs from eastern North America. All cranial bones can be assigned to Hyperodapedontinae. The dentition of the Nova Scotian hyperodapedontine differs from those ofHyperodapedonandIsalorhynchus.The maxilla apparently did not have more than two lateral rows and two medial rows of teeth. The teeth of the lateral row closest to the single groove dividing the maxillary tooth plate are more than twice as large as those of the medial row closest to the groove. The lateral and medial tooth-bearing portions of the maxilla become increasingly crest-like during ontogeny. The dentary lacks a lingual row of teeth. Based on this combination of features, the hyperodapedontine material from the Evangeline Member is assigned to a new taxon,Oryctorhynchus bairdi, gen. et sp. nov., which is the sister species to an unnamed hyperodapedontine taxon from Wyoming. This clade was recovered as the sister taxon toHyperodapedonspp. in the phylogenetic analysis. The late Carnian or earliest Norian tetrapod assemblage from the Evangeline Member represents a mixture of faunal elements from a wide paleolatitudinal range, suggesting a more cosmopolitan distribution for continental tetrapods during the early Late Triassic than previously assumed. en
dc.relation.ispartof Journal of Vertebrate Paleontology en
dc.title A New Rhynchosaur (Reptilia, Archosauromorpha) from the Upper Triassic of Eastern North America en
dc.type Journal Article en
dc.identifier.srbnumber 156684
dc.identifier.doi 10.1080/02724634.2020.1771568
rft.jtitle Journal of Vertebrate Paleontology
rft.spage Article e1771568
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Paleobiology en
dc.citation.spage Article e1771568
dc.relation.url https://www.tandfonline.com/doi/full/10.1080/02724634.2020.1771568?scroll=top&needAccess=true

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