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Re: Even more on dino metabolics
>Something I forgot in my discussion of dinosaur air-sac systems, and Ruben's
>concern about the lack of large sternal plates in dinosaurs. Of course, we
>now know that some advanced theropods had sternal plates as large as those of
>many birds. In fact, the theropods' sternals are sometimes larger than those
>of flightless birds! In addition, theropods and (as we now know) sauropods
>had gastralia that may have been used to help ventilate abdominal air-sacs.
Don't stop there Greg. Crocs and plesiosaurs also had (or have) gastralia.
Proof-positive that they also had (have) air-sacs?