Crosbysaurus
Genus of reptiles
Crosbysaurus is a genus of extinct archosauromorph that lived in the Late Triassic of Arizona, New Mexico, North Carolina, Texas, and Utah. It is known from the Chinle Formation and Dockum Group rock units from the southwestern United States. The type species is C. harrisae, and the only known material includes teeth. 11 specimens are known, each including a single tooth.
Crosbysaurus was originally identified as an ornithischian dinosaur by Andrew Heckert when it was first described in 2004. Further work has shown that it is likely an archosauromorph based on the features of its teeth, and it may belong to Archosauriformes. The taxon is likely valid as it differs from other genera from the same region known from teeth like Revueltosaurus, Tecovasaurus, Krzyzanowskisaurus, Lucianosaurus, and Protecovasaurus.
01Description
The teeth of Crosbysaurus are triangular in outline with serrations on both edges. Almost all specimens have "compound denticles"; serrations with their own subdivisions. The serrations on the trailing (posterior/distal) edge of the tooth are always larger than the leading (anterior/mesial) edge. The teeth are small, approximately 3-5 millimeters tall. Owing to their blunt outline it is presumed that Crosbysaurus was a herbivore.
Sources and credits
This article is adapted from the Wikipedia article “Crosbysaurus”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Crosbysaurus referred.png by Robert Gay, Isabella Aude, CC BY 4.0
- Crosbysaurus hypothetical.png by Robert Gay, CC BY 4.0
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