Gravitholus

Gravitholus Temporal range: Late Campanian, 75 Ma PreЄ Є O S D C P T J K Pg N ↓
Skull TMP 72.27.01
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Order:	†Ornithischia
Suborder:	†Pachycephalosauria
Family:	†Pachycephalosauridae
Genus:	†Gravitholus Wall & Galton, 1979
Species:	† G. albertae
Binomial name
Gravitholus albertae Wall & Galton, 1979

Gravitholus (meaning 'heavy dome') was a genus of dinosaur from the late Cretaceous period (Campanian stage, around 75 million years ago). It was a pachycephalosaur, a type of dinosaur with a thick skull made of hardened bone. It lived in what is now Alberta, Canada, and was described in 1979 by W. P. Wall and Peter Galton.

The type species is Gravitholus albertae. There is some debate amongst paleontologists as to whether the animal represents a distinct genus, or if it may be synonymous with Stegoceras. Recent publications indicate it may be a valid genus.

See also

• Timeline of pachycephalosaur research

References

• Wall, W.P. & Galton, P.M. (1979). "Notes on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America, with comments on their status as ornithopods". Canadian Journal of Earth Sciences. 16:1176-1186

• Maryanska, T., Chapman, R.E., and Weishampel, D.B. (2004). "Pachycephalosauria". In D. B. Weishampel, P. Dodson & H. Osmólska (eds.), The Dinosauria (second edition). University of California Press, Berkeley 464-477

External links

• Gravitholus at the Paleobiology Database
• Pachycephalosauria at Thescelosaurus!
• Gravitholus on the Dinosaur Mailing List