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Sullivan also rejected attempts by Sereno (1986), in his phylogenetic studies, [15] to re-define Pachycephalosauridae to include only "dome-skulled" species (including Stegoceras and Pachycephalosaurus), while leaving more "basal" species outside that family in Pachycephalosauria. Therefore, Sullivan's use of Pachycephalosauridae is equivalent ...
Sullivan described the new genus Colepiocephale to house the species Stegoceras lambei. He also erected the new genus Hanssuesia to house the species Troodon sternbergi. [3] Artist's restoration of Alaskacephale. 2005. A. O. Averianov, T. Martin, and A. A. Bakirov described the new genus and species Ferganocephale adenticulatum. [13]
The type species, C. lambei, was originally described by Sternberg (in 1945 as Stegoceras lambei [1]), and later renamed by Sullivan in 2003. C. lambei is a domed pachycephalosaur characterized principally by the lack of a lateral and posteriosquamosal shelf, a steeply down-turned parietal , and the presence of two incipient nodes tucked under ...
Pachycephalosaurus is the most famous member of Pachycephalosauria, even if it is not the best-preserved member. The clade also includes Stenopelix, Wannanosaurus, Goyocephale, Stegoceras, Homalocephale, Tylocephale, Sphaerotholus, and Prenocephale.
In 2006, Sullivan argued against the idea that the extent of doming was useful in determining taxonomic affinities between pachycephalosaurs. [32] In 2003, Sullivan found Stegoceras itself to be more basal (or "primitive") than the "fully-domed" members of the subfamily Pachycephalosaurinae, elaborating on conclusions reached by Sereno in 1986.
Alaskacephale was a member of the group Pachycephalosauria, a family of thick-skulled, herbivorous, bipedal dinosaurs that lived during the Cretaceous period in Asia and North America. [7] The last pachycephalosaurs went extinct during the Cretaceous-Paleogene extinction event , the last surviving genus being Pachycephalosaurus itself.
It's hard to believe one of Sex and the City's most shocking deaths is old enough to order itself a Cosmopolitan.. In a show full of unforgettable moments, season 6's episode 18, aptly titled ...
†Pachycephalosauria Marginocephalia ( / ˌ m ɑːr dʒ ə n oʊ s ə ˈ f æ l i ə / Latin: margin-head) is a clade of ornithischian dinosaurs that is characterized by a bony shelf or margin at the back of the skull.