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Re: CROCODYLOMORPH ENDOTHERMY

To: Multiple recipients of list <dinosaur@lepomis.psych.upenn.edu>
Subject: Re: CROCODYLOMORPH ENDOTHERMY
From: Dinogeorge@aol.com
Date: Fri, 26 Jan 1996 13:20:59 -0500
Reply-to: Dinogeorge@aol.com
Sender: dinosaur@lepomis.psych.upenn.edu

In a message dated 96-01-26 06:44:07 EST, Robert.J.Meyerson@uwrf.edu (Rob
Meyerson) writes:

>A four-chambered heart is a very efficent structure.  Since it has been my
>observation that extreme efficency is an endotherm feature, couldn't we
>conclude
>that thecodontians were endotherms?
>
>Besides, how could they have out-competed therapsids (largely considered to
>be
>endotherms) if thecodonts were ectotherms?
>
>

Ectotherms are the top predators in several environments even now. Who's to
say which groups would have been on top when endothermy was in the first
stages of its development?

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