[Taxacom] New systematics book

Curtis Clark lists at curtisclark.org
Mon Sep 9 22:44:03 CDT 2013

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

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