R: R: Late J Heterodontosaurs (was Re: Sereno's Prosauropoda)

["Alessandro Marisa" <amaris@tin.it>]

-----Messaggio originale-----
Da: Dinogeorge@aol.com <Dinogeorge@aol.com>
A: amaris@tin.it <amaris@tin.it>; dinosaur@usc.edu <dinosaur@usc.edu>;
th81@umail.umd.edu <th81@umail.umd.edu>
Data: venerdì 9 luglio 1999 0.40
Oggetto: Re: R: Late J Heterodontosaurs (was Re: Sereno's Prosauropoda)


>This is best apomorphy uniting H and M. But there are a few problems, such
as
>premax extanding back to lacrimal in Heterodontosaurus and many (though not
>all) advanced ornithopods (probably appeared independently in
>Heterodontosaurus). Also a nice suite of primitive features common to H and
>M, but these aren't phylogenetically interesting.


However, apart from the caniniform teeth, there are other features present
in Heterodontosauridae and Marginocephalia, for example a jugal boss, and a
diastema between the premaxilla and maxilla.
For my opinion Agilisaurus louderbacki are much closer to Euornithopoda than
the Heterodontosauridae.

By
Alessandro Marisa
 "Volunteer of Paleontological Museum of Monfalcone"
Via Achille Grandi n°18
38068 ROVERETO (TN) ITALY
Tel: 039-0464-434658 Email: amaris@tin.it