The braincase of Apatosaurus (Dinosauria, Sauropoda) based on computed tomography of a new specimen, with comments on variation and evolution in sauropod neuroanatomy. (American Museum novitates, no. 3677)

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dc.contributor.authorBalanoff, Amy M.
dc.contributor.authorBever, Gabe S.
dc.contributor.authorIkejiri, Takehito.
dc.date.accessioned2010-03-09T19:40:35Z
dc.date.available2010-03-09T19:40:35Z
dc.date.issued2010
dc.description29 p. : ill. ; 26 cm. "March 4, 2010." Includes bibliographical references (p. 26-29).en
dc.description.abstractWe describe a previously unreported braincase of the sauropod dinosaur Apatosaurus from the Cactus Park Quarry, Morrison Formation of western Colorado using high-resolution X-ray computed tomography. The digital nature of these data allowed us to prepare and describe the first three-dimensional rendering of the endocranial space in this historically important dinosaur species. Results are compared with a range of taxa drawn from across the sauropod tree revealing previously underappreciated variation in the sauropod neurocranium. Examples of variable characters include the degree of cerebral and pontine flexure, the morphology of the parietal body and superior sagittal sinus and their relationship with the overlying dermal roof, and the conformation of several cranial nerve foramina. We provide preliminary evolutionary hypotheses and discussion for many of these features. The recognition that considerable variation is present in the sauropod neurocranium hopefully will encourage more detailed descriptions of this anatomically complex region, as well as facilitating a synthetic review of the sauropodomorph braincase as these descriptions become available.en
dc.format.extent10149288 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/6040
dc.language.isoen_USen
dc.publisherNew York, NY : American Museum of Natural History.en
dc.relation.ispartofseriesAmerican Museum novitates, no. 3677.en
dc.subjectApatosaurus.en
dc.subjectSkull.en
dc.subjectColorado.en
dc.titleThe braincase of Apatosaurus (Dinosauria, Sauropoda) based on computed tomography of a new specimen, with comments on variation and evolution in sauropod neuroanatomy. (American Museum novitates, no. 3677)en

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