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Cranial osteology of the theropod dinosaur Incisivosaurus gauthieri (Theropoda, Oviraptorosauria). (American Museum novitates, no. 3651)

Show simple item record Balanoff, Amy M. Xu, Xing, 1969- Kobayashi, Yoshimura. Matsufune, Yusuke. Norell, Mark. 2009-01-15T20:24:23Z 2009 2009
dc.description 35 p. : ill., 1 map ; 26 cm. "June 25, 2009." Includes bibliographical references (p. 32-35). en
dc.description.abstract We provide a description of the holotype skull of the unusual oviraptorosaur Incisivosaurus gauthieri. Previous phylogenetic analyses have placed this taxon firmly within Oviraptorosauria near the base of the clade; however, until now only a cursory description of this important specimen was available. The presence of many primitive characteristics (e.g., maxillary and dentary teeth as well as an extended palate and rostrum) indicates that the observed similarities between avians and derived oviraptorids are convergences rather than shared derived characters. In addition, we clarify previous descriptions of several ambiguous anatomical features, most notably of the palate. We also employ computed tomographic (CT) analysis, which allows for a more complete description of the braincase and the reconstruction of an endocranial endocast. CT imagery reveals features that were before unobtainable, such as the presence of a replacement tooth behind the large rodentiform incisor in the premaxilla. This arrangement indicates that although the incisiform teeth of I. gauthieri are morphologically distinct they are replaced in typical archosaurian fashion. en
dc.description.sponsorship American Museum of Natural History. en
dc.format.extent 14997687 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.ispartofseries American Museum novitates, no. 3651. en
dc.subject Incisivosaurus gauthieri. en
dc.subject Skull. en
dc.subject Oviraptorosauria. en
dc.subject China. en
dc.subject Beipiao Shi Region. en
dc.subject Liaoning Sheng. en
dc.title Cranial osteology of the theropod dinosaur Incisivosaurus gauthieri (Theropoda, Oviraptorosauria). (American Museum novitates, no. 3651) en
dc.title.alternative Incisivosaurus gauthieri osteology. en

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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