Re: Lewisuchus, a Dinosauriform

["Mickey Mortimer" <Mickey_Mortimer11@msn.com>]

George Olshevsky wrote-

> Not at all. The so-called "basal sauropodomorphs" (i.e., prosauropods) are
> >more< derived than the sauropods (the phalanges of the fifth pedal digit
are
> reduced to absent among them). Indeed, they may represent a bunch of
> transitional clades between the sauropods and the theropods (and also the
> ornithischians). Also,  I disagree that the fifth digit re-evolved in any
> dinosaur lineage. I think that idea arises from wanting to make the data
fit
> the cladistic analysis rather than vice versa.

So how would you represent your hypothesis in a cladogram?  Like this?
________Sauropoda
|________plateosaurids, massospondylids, melanorosaurids, etc.
 |________Herrerasauridae
  *phalanx V-1 lost here
  |________Thecodontosaurus, Saturnalia
   |________Ornithischia
    |________Lagerpeton, Marasuchus
     |________Guaibasaurus
      |________"Eutheropoda"
And why do you place so much emphasis on phalanx V-1, at the expense of
letting over twenty other characters reverse or parallel?  Do you have other
characters to support your phylogeny?

Mickey Mortimer