Pachycephalosaurus
Pachycephalosaurus was a genus of dinosaur which lived during the last five million years of the Upper Cretaceous. It lived in what is now North America.[2] This member of the Pachycephalosaurid family is known from a single skull and a few thick skull roofs. From this it is estimated that its length was about 4.5 to 5 metres long (about 15 feet).
| Pachycephalosaurus Temporal range: Late Cretaceous (Maastrichtian),
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| Holotype skull of "P. reinheimeri". | |
Scientific classification 
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| Unrecognized taxon (fix): | Pachycephalosaurinae |
| Tribe: | Pachycephalosaurini |
| Genus: | Pachycephalosaurus Brown & Schlaikjer, 1943 |
| Type species | |
| †Troodon wyomingensis Gilmore, 1931
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List
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Pachycephalosaurus was a herbivore. It lived on a mixed diet of leaves, seeds, and fruit. The sharp, serrated teeth would have been very effective for shredding plants.[3]
Pachycephalosaurus Media
Holotype of P. wyomingensis
Pachycephalosaurus wyomingensis skull (AMNH 1696) on display at the American Museum of Natural History.
Illustration of Pachycephalosaurus wyomingensis
Size of Pachycephalosaurus wyomingensis, a genus of Pachycephalosaurid dinosaur that lived in North America in the Cretaceous period, more precisely in the Hell Creek Formation. The human silhouette is from
Several pachycephalosaur relatives discovered from Hell Creek
Casts of three skulls, representing possible growth stages, Museum of the Rockies
Growth series showing reduction of spikes and growth of dome with age, according to Horner and Goodwin
Size of an adult P. wyomingensis (green) and potential growth stages, compared to a human
Paleoart of head-butting subadults
References
- ↑ Giffin, Emily B.. A New Pachycephalosaurid Hell Creek Formation of Montana. Journal of Vertebrate Paleontology 7 (4) (22 January 1988)Taylor & Francis, Ltd.. p. 398–407. doi:10.1080/02724634.1988.10011672. Retrieved 13 November 2020.
- ↑ Giffin, Emily B; Gabriel, Diane L; Johnson Rolf E. 1988. A new Pachycephalosaurid: Hell Creek Formation of Montana. Journal of Vertebrate Paleontology. 7 (4): 398–407.
- ↑ The dinosauria (2004). Berkeley, Calif.: University of California Press. ISBN 978-0-520-94143-4. OCLC 801843269.
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