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Re: Giant flightless birds
In a message dated 5/11/99 6:05:56 AM, email@example.com writes:
<< What I can't readily see is why T_Rex (if it was always terrestrial) had
lost the opposable quality of its digits. Again, it seems to make more sense
that a terrestrial animal would always be in need of good grasping ability of
its forelimbs for the procurement of prey. The only reason for loss of such
ability, (that I can visualize) would be that the condition was inherited
from an Avian ancestor that itself had lost the third digit. >>
Did you consider T. Rex's jaws? They look like fairly useful prey grasping
devices. Maybe they obsoleted the hands as "second-best."
And consider crocodiles and birds. What do they use for prey grasping?
Yet they are phylogenetically on either side of T. Rex. Care to interpolate?
-- Tom Hopp