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> From: firstname.lastname@example.org
> Date: Sat, 22 Apr 2000 09:14:16 -0400 (EDT)
> To: email@example.com
> "The problem of the aramdillo model for excavating eggs is that this
> mammal has forarms adapted for digging: large elbow (olecronon) for
> muscles, massive upper arm (humerus) with enlarged muscles, elongated
> claws for digging. None of the mammals from the Mesozoic known to date
> have any of these features.
Armadillos certainly are dependent upon these features. But a mammal
preying on a dinosaur nest would not be. Such an animal needs only to
excavated a loose, sandy matrix, or loose vegetation. Armadillos must
move hard packed soil. So, I agree that known Mesozoic forms could not
construct a tunnel network beneath a dinosaur nest. I do, however, feel
they could remove enough nest material to expose eggs and dispatch them in
the manner of armadillos (assuming armadillos merely knock them together).
May I forward any reply to the dino list?