Named By: Maryanska & Osmolska - 1974.
Synonyms: Homalocephale? Sphaerotholus buchholtzae
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Pachycephalosauridae.
Species: P. prenes (type), P. brevis, P. edmontonensis
Size: About 2.4 meters long.
Known locations: Mongolia.
Time period: Campanian of the Cretaceous.
Fossil representation: Mostly skulls and a few fragmentary post cranial remains.
mostly from skulls, Prenocephale seems to have
been a fairly large
that lived in what is now Mongolia. The snout of
Prenocephale is narrower than that of many other
genera, suggesting that it was more of a selective browser.
While Prenocephale is considered to be a valid genus, two others named Sphaerotholus buchholtzae and Homalocephale, have been suggested to be synonyms of Prenocephale. Whereas Prenocephale has a dome on its head, Sphaerotholus buchholtzae and Homalocephale are flatter on top, but the advent of new discoveries in other genera seems to indicate that pachycephalosaurs did not develop the dome structure on their heads until they were adults. With this in mind, many palaeontologists have suggested that Sphaerotholus and Homalocephale are merely the juvenile and sub adult individuals of Prenocephale.
Another pachycephalosaur genus that may have lived alongside Prenocephale is Tylocephale.
- Texacephale langstoni, a new genus of pachycephalosaurid (Dinosauria: Ornithischia) from the upper Campanian Aguja Formation, southern Texas, USA, N. R. Longrich, J. Sankey & D. Tanke - 2010.