<< I have never quite understood why _Psittacosaurus_ has something like seven or eight valid species, but _Coelophysis_, _Syntarsus_ (Raath), _Eucoelophysis_, etc. were placed in separate genera. It's aesthetic philosophy, not science sensu stricto. >>
So far nobody has been able to come up with a consistent way to group
together the various species of Psittacosaurus. You either have x species or
x genera. They all look enough alike that the species level is considered
more appropriate.
it beats Psittacosaurus i tell ya;)
-Øyvind M. Padron | |-Amateur Palæontologist |-PaleoArtist | |-For another dinosaur website try: |-http://the_dinosauria.tripod.com