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Re: CNN on Lungs and Feathers

To: dinosaur@usc.edu
Subject: Re: CNN on Lungs and Feathers
From: Stanley Friesen <sarima@ix.netcom.com>
Date: Tue, 06 Jan 1998 19:48:37 -0800
In-reply-to: <199801060555.VAA23443@ava.bcc.orst.edu>
Reply-to: sarima@ix.netcom.com
Sender: owner-dinosaur@usc.edu

At 09:55 PM 1/5/98 -0800, Terry D. Jones wrote:
>
>So by this reasoning turtles, crocs, and lizards--animals with 
>pneumatized vertebrae--also had air sacs?

Do they have true pneumatized vertebrae, or merely excavated vertebrae?
There is a difference.  (Look at the cross-section of an _Allosaurus_
vertebra in Farlow's book to see what I mean).  That sort of structure only
forms where epithelial tissue invades the bone.

--------------
May the peace of God be with you.         sarima@ix.netcom.com
                                          sfriesen@netlock.com

References:
- Re: CNN on Lungs and Feathers
  - From: jonest@ava.bcc.orst.edu (Terry D. Jones)

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