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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.author Balanoff, Amy M.
dc.contributor.author Bever, Gabe S.
dc.contributor.author Ikejiri, Takehito.
dc.date.accessioned 2010-03-09T19:40:35Z
dc.date.available 2010-03-09T19:40:35Z
dc.date.issued 2010
dc.identifier.uri http://hdl.handle.net/2246/6040
dc.description 29 p. : ill. ; 26 cm. "March 4, 2010." Includes bibliographical references (p. 26-29). en
dc.description.abstract We 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.extent 10149288 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher New York, NY : American Museum of Natural History. en
dc.relation.ispartofseries American Museum novitates, no. 3677. en
dc.subject Apatosaurus. en
dc.subject Skull. en
dc.subject Colorado. en
dc.title 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) 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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