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Re: The Ornithodira: A New Hypothesis, or a Revived One?

Jaime Headden wrote-

That *Allosaurus* lacks
> furculae, but *Sinraptor* possesses them shows that
> the structure does not preserve as a result of loss of
> noise suppression in the geneaology, but suggests that
> perhaps there was a functionary purpose nesseccary to
> ankylosis of the clavicular halves or ossification of
> the intraclavicular cartilage or tendons that allowed
> *Sinraptor* to do something, or prevented something
> else from occuring.

What's this you say?  Allosaurus (or at least Morrison allosaurids) has
furculae and the condition in Sinraptor is unknown.

Mickey Mortimer