Re: Warm-Blooded debate

[NJPharris@aol.com]

In a message dated 97-06-18 19:22:03 EDT, Dinogeorge@aol.com writes:

> Since crocs >almost< have four-chambered hearts, 

Or indeed formerly had them...

>  and birds have them, we can
>  use the Extant Phylogenetic Bracket to argue that all dinosaurs, which are
>  phylogenetically between crocs and birds, had them. 

True.

>  This, rather than
>  endothermy--which developed much later, perhaps only in the theropod
lineage
>  that eventually evolved into birds--

Whose words are these?  If they are yours, how do you know this?

>  was necessarily responsible for
>  dinosaurs' erect stance and cruising ability.

Nevertheless, can you name me a fully erect, fully four-chambered-hearted,
ectothermic animal?

NP