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RE: Pygostyle

> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> Timothy Williams
>
> "T. Mike Keesey" <tkeese1@gl.umbc.edu> wrote:
>
> >Yeah, and since when are megalosaur[id] arms big?
>
> Since at least the Middle Jurassic.  _Torvosaurus_ and
> _Xuanhanosaurus_ have
> massive antebrachial elements,

Massive, yes, but SHORT.

>and from memory _Eustreptospondylus_ and
> __Marshosaurus_ as well.  Short, but massive.

_Eustrept._ forearms are not known, and the humeri not massive: they are
_Allosaurus_ (or _Dryptosaurus_)-like.

_Marshosaurus_ doesn't have arms (okay, doesn't have arms KNOWN), and it
isn't a basal tetanurine (aka "megalosaur").  It's a... oh, wait, that would
be telling... :-]

> All these can be loosely
> termed "megaloasurs"; _Torvosaurus_ (at least) seems to be very closely
> related to _Megalosaurus_.


                Thomas R. Holtz, Jr.
                Vertebrate Paleontologist
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
                College Park, MD  20742
http://www.geol.umd.edu/~tholtz/tholtz.htm
http://www.geol.umd.edu/~jmerck/eltsite
Phone:  301-405-4084    Email:  tholtz@geol.umd.edu
Fax (Geol):  301-314-9661       Fax (CPS-ELT): 301-405-0796