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Re: Sauropod ancestry?
In a message dated 7/18/00 12:01:02 PM EST, firstname.lastname@example.org writes:
<< Therizinosauroidea simply took an already-existing digit and put it
back in contact with the ground (so to speak). For Sauropoda to have
evolved from Prosauropoda, they would have had to redevelop a digit that
was lost. >>
Not to mention that this was the >first< pedal digit, not the fifth, which
was lost in segnosaurs (only a splint metatarsal V remained).