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Re: Re: labels are imaginary

>    How about endothermy, the possesion of feathers (not proven for any 
>dinosaurian group no matter what anyone says) and flight?  Birds have 
>been going thier own way and doing thier own thing evolutionarily since 
>the Jurassic.  
And no one (but Dinogeorge and Thulborn) wants to call traditionally
nonavian dinosaurs members of "Aves".  Aves, Avialae, call it what you will:
this clade is recognized as a distinct taxon WITHIN A MORE INCLUSIVE CLADE
(just as Cetacea is part of Ungulata and Eutheria and Theria and Mammalia,
or Serpentes is part of Squamata and Lepidosauria and Lepidosauromorpha and

Thomas R. Holtz, Jr.
Vertebrate Paleontologist
Dept. of Geology
University of Maryland
College Park, MD  20742
Email:Thomas_R_HOLTZ@umail.umd.edu (th81)
Fax: 301-314-9661