Centrosaurus brinkmani, new ceratopsian

[Tim Williams <twilliams_alpha@hotmail.com>]

Ryan, M.R. and Russell, A.P. (2005).  A new centrosaurine ceratopsid from 
the Oldman
Formation of Alberta and its implications for centrosaurine taxonomy and 
systematics.  Can. J. Earth Sci. 42: 1369?1387.


Abstract: "_Centrosaurus brinkmani_ (sp. nov) is distinguished from 
_Centrosaurus apertus_ by key features of its cranial ornamentation, 
including the shape and orientation of the postorbital horn and parietal 
ornamentation at parietal locus 3, the shape of the parietal ornamentation 
at locus 2, and the possession of accessory parietal ossifications developed 
as short spines on the caudal parietal ramus. This species is restricted to 
the Oldman Formation of southern Alberta and is the oldest ceratopsid 
represented by diagnostic material in Canada. Phylogenetic analysis of the 
Centrosaurinae suggests that the development of spike-like ornamentation at 
the parietal locus 3 parietal locus is inversely related to the development 
of the P1 parietal ornamentation."