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Re: Lumpers and Splitters
On Sun, 29 Oct 1995 RaptorRKC@aol.com wrote:
> Why, suddenly, are some species of Aublysodon placed into
> a new genus, Sinraptor?.
Like the taxonomy of all other groups of organisms,that of dinosaurs is
plagued by poor descriptions and names based on poor, non-diagnostic
material. Most of this happened early on in the feild but the practice
seems to continue. In this case Aublysodon mirandus was based on teeth.
Although the unserrated D - shaped premaxillary teeth seem to be
distinctive and obviously belong to primitive tyrrannosaurs it is far
from certain how many species of these "Aublysodontines" exist. Indeed
when the group is better understood it will be next to impossible to
decide which one the holotype teeth belong to.This makes
Aublysodon mirandus a nomina dubium (a dubious name that cannot applied
to any other fossil other than the holotype) Therefore G.O. erected the
name Stygvenator (not Sinraptor) for the species "A." molnaris which is
based on diagnostic material
(the Jordan Theropod - a snout of one of these "aublysodontines").
Sinraptor is a newly described genus of large theropod from China, it is
a close relative of Yangchuanosaurus.