Re: Eocursor, new basal ornithischian

[David Marjanovic <david.marjanovic@gmx.at>]

> Sacisaurus + Silesaurus are dinosauriforms

(Dinosaurs, too, are dinosauriforms by definition.)

> The characters in these taxa that
> supposedly support a relationship with the ornithischia are based on 
> dental
> characters which can be homoplastic.

That's true, but everything can be homoplastic. Parsimony -- the 
minimization of the assumption of convergence -- is what (currently) keeps 
*Silesaurus* out of Dinosauria and Ornithischia.

> Are there any other characters that support a Sacisaurus/Silesaurus +
> Ornithischia relationship to the exclusion of other dinosauriforms?

Yes, just not enough. One is the ability to pronate the forearm and thus to 
walk quadrupedally with vertical forelimbs.