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Re: Sauropod ancestry?

In a message dated 7/18/00 12:01:02 PM EST, tmk@dinosauricon.com 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).