[Taxacom] New systematics book

[Curtis Clark]

On 2013-09-09 8:09 AM, Fred Schueler wrote:
> * if reptilia is a grade, "Birds are descended from Reptiles" is just a
> way of saying "endothermy is an avian apomorphy."

Aye, there's the rub. The evidence of endothermy in non-avian dinosaurs 
is pervasive if not conclusive. One by one, the synapomorphies of 
"birds" fall deeper into the theropods as we learn more.

-- 
Curtis Clark        http://www.csupomona.edu/~jcclark
Biological Sciences                   +1 909 869 4140
Cal Poly Pomona, Pomona CA 91768