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Showing results for tags 'pachycephalosaurid'.
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From the album: Hell Creek / Lance Formations
A river-worn, shed Ornithischian dinosaur tooth found in a channel deposit. Despite its rough shape, the prominent central ridge and denticles make me think it's Pachycephalosaurid.- 1 comment
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Got this interesting piece of bone from a collection of Aguja Formation material collected in Texas. It was in a bag with a label that said "Pachycephalosaurus skull spike". While I know the genus label isn't accurate, my research indicates that there is pachycephalosaurid (Texacephale langstoni) material described from this formation. I see there are also ankylosaurids, ceratopsians, and nodosaurids as well. I figure the two notches in the bone could help with identification, or just be erosion on a random piece of spike shaped bone. I appreciate any input!
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My Jurassic Park: Pachycephalosaurid Domes & Teeth from Hell Creek Fm
Troodon posted a topic in Member Collections
Genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex in MT, SD and WY and all are found in the Hell Creek and Lance Formations although my specimens are just from the HC. I've identified these domes based on my, best guess, using accepted convention, however, in 2007 Horner presented a theory which proposed that Dracorex hogwartsia and Stygimoloch spinifer are growth stages of Pachycephalosaurus wyomingensis and represent an ontogenetic series of P. wyomingensis with Dracorex being the youngest. Pachycephalosaurid indet.: I think the shape is that of a P. wyomingensis but not certain, why I labeled it indet. Braincase cavities visible in ventral view Views: Dorsal, Left Lateral, Ventral Stegoceras sp.: Braincase cavities very evident in ventral view. Views: Dorsal, Left Lateral, Ventral Pachycephalosaurus wyomingensis: Interesting partial dome. One gets a great view on how thick these domes were, this one is a whopping 4 inches. A closeup of the structure of the layer beneath the outer surface is quite interesting. Views: Lateral, Dorsal, Ventral, Closeup- 37 replies
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