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Re: carcharodontine furculae
On Fri, 21 Apr 2000, Mickey Mortimer wrote:
> 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 Unpublished Masters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).