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Re: Re: Re: Not carnosaurs, this time...
Jonathan Wagner wrote:
> Well, as much as any cladogram can, it certainly does not refute
>such a reference (although it does refute the placement of A. sternbergi in
>Albertasaurus *or* Gorgosaurus (no, TRHJr, size of teeth was not a
>character), but I am somewhat skeptical of this, since it is largely based
>on sexual selectors (lacrimal horns), and the FMNH has a lot on common with
>Dapletosuarus and arctunguis/sarcophagus.
There is an interesting aspect of the ischia of sternbergi and novojilovi
that few have noticed before, but I don't know if it's significant...
>P.S. For all you taxonomists out there, why do we call these the
>Tyrannosauridae, a simple family, when the more similar Ornithomimids get a
Because Barsbold never got around to naming "Tyrannosauria" (although Mike
Brett-Surman and George Olshvesky did).
>I think Tyrannosauridae should be limited to a node-based taxon of the
>most primitive taxon now referred to Albertosaurus + T. rex, and the
>outgroups should be placed in Tyrannosauroidea (all thereopods closer to
>T. rex than to Ornithomimus).
This has been suggested by many authors, most recently Carpenter (in 1992).
> Which then brings up, what do we call the noe of Ornithomimus +
>Tyrannosaurus. Tom Holtz?
No, "Tom Holtz" is not a suitable name for that node, since my dad has
priority over it... :-)
I'd just as soon leave that node unnamed, and use the stem-based
"Arctometatarsalia" for it.
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:firstname.lastname@example.org
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661
"There are some who call me... Tim."