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Re: Which is Cosesaurus (palatal teeth)
Ken Kinman wrote:
<What about palatal teeth in prolacertiforms? I assume
early prolacertiforms had palatal teeth, so where in
the proposed prolacertiform-to-pterosaur lineage were
the palatal teeth lost?>
Palatal (all the palatal bones have been known to
bear teeth) teeth are lost in a lot of taxa
(independantly) within the Tetrapoda; I assume I could
say most osteichthyians, instead. It is not
inconceivable to suggest a basal archosaur like
*Euparkeria* with small, very sparse platal teeth,
could be one of two lineages that reduce the need for
Larry Febo wrote:
<<So,...Cosesaurus has independently evolved
mesotarsal ankles, and antorbital fenestra that may
not really be antorbital fenestra? .... a
An archosauromorph. The antorbital fenestra is, I
believe, an archosauromorph synapomorphy, or has been
proposed by such. Sorry, no ref. Witmer (1994) I
believe covers the subject -- will check with my copy.
Jaime "James" A. Headden
"Come the path that leads us to our fortune."
Qilong---is temporarily out of service.
Check back soon.
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