In a message dated 3/11/00 1:27:10 PM EST, twilliams_alpha@hotmail.com writes: << The latest study of _Cosesaurus aviceps_ (that I know of) put it in among the Prolacertiformes. It's "birdy" characters (like the triangular shape of the skull in profile) are very dubious. >> No more dubious than scores of other "characters" used in cladistic analyses.