[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: CROCODYLOMORPH ENDOTHERMY

To: Multiple recipients of list <dinosaur@lepomis.psych.upenn.edu>
Subject: Re: CROCODYLOMORPH ENDOTHERMY
From: Robert.J.Meyerson@uwrf.edu (Rob Meyerson)
Date: Thu, 25 Jan 1996 11:39:36 -0500
Reply-to: Robert.J.Meyerson@uwrf.edu
Sender: dinosaur@lepomis.psych.upenn.edu

>"Returned to ectothermy"? As far as I know, all crurotarsan thecodontians
>were always ectotherms. But with four-chambered hearts.

But....

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?

Rob

***
"Don't panic!"

Prev by Date: Re: Life's scale reduction since the Dinosaurs
Next by Date: Re: Re: Abelisaur & Titanosaur migratory routes
Previous by thread: Re: CROCODYLOMORPH ENDOTHERMY
Next by thread: Re: CROCODYLOMORPH ENDOTHERMY
Indexes: