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RE: carcharodontine furculae



> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> AM Yates
>
> >
> > Tykoski, R.S.  1998.  The osteology of Syntarsus kayentakatae and its
> > implications for ceratosaurid phylogeny.  Unpublished Masters
> > Thesis,University of Texas at Austin, 217 pp.
> >
> > Therefore, the most inclusive clade with furculae would be the
> Eutheropoda,
> > which may equal Theropoda depending on the position of Eoraptor and
> > herrerasaurids.  The furcula has been lost in several lineages though,
> > including Carnotaurus, Segisaurus, Pelecanimimus (and probably other
> > ornithomimosaurs), Sinosauropteryx and Sinornithoides.
>
> Further preparation on Segisaurus has revealed that the clavicles were
> fused into a furcula in that specimen as well. Furthermore the the
> ventral ends of the clavicles of Sinornithoides are broken so they could
> be the two ends of a furcula whose midsection is missing (especially
> since Troodon furculae have been described).

Furthermore, it is not at all clear that the Carnotaurus clavicular element
ISN'T broken: the midline part of the element (fused or otherwise) is not
clearly preserved.

Incidentally, where is the name "Eutheropoda" published, and what is its
definition?

                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
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