[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Removing segnosaurs from ...

In a message dated 95-08-30 19:03:32 EDT, Thomas_R_HOLTZ@umail.umd.edu (th81)

>So goes one phylogeny.  Another would have the tetradactyl pes of
>herrerasaurids, theropods, prosauropods, and ornithischians being primitive,
>with sauropod feet a "reversal" of sorts.  

I'm always suspicious of reversals that involve regaining a previously lost
feature, such as a digit: the Panda's thumb problem, if you know what I mean.