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Re: CURSORIAL STEGOSAURS?
In a message dated 7/30/01 6:16:27 PM EST, email@example.com writes:
<< Bipedal ancestry, where the manus served a different function than the
would be a viable explanation/hypothesis for this discrepency. This, and
many other pieces of evidence I have seen in sauropods, suggest to me that
sauropods, too, had a bipedal ancestor. >>
The same kinds of effects would be expected in a terrestrial quadruped
descended from an arboreal quadruped. All that's necessary is that the
forelimbs acquire a somewhat different locomotor function from the hind
limbs, which they would do in an arboreal climber (hind limbs would push,
forelimbs would pull). My own picture of the ancestral sauropod is something
vaguely like a tamandua, about the same size but with a smaller head, longer
neck, and longer tail. Facultative bipedality would certainly be within the
realm of its locomotor repertoire.