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Re: Why Air Sacs?



----- Original Message -----
From: "Roberto Takata" <rmtakata@gmail.com>
Sent: Friday, November 17, 2006 8:20 PM

Theropods [...] simply inherited it from a
ancestral saurischian dinosaur which in turn inherited from a
ancestral dinosaur which in turn inherited from a ancestral
dinosauriform organism?

Looks like it.

The ptero hollow bones was lined with air-sacs?

What else? :-)