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Re: Screaming dromaeosaur biplane killers of the air

Jaime Headden wrote-

> They are different from that of enantiornithines, *Boluchia*,
> and basal ornithothoracines, where the furculae are Y-shaped, have broad
> rami that are more C-shaped in section than L-shaped as in *Archaeopteryx*
> and *Microraptor*, or than subcircular (slightly flattened) as in
> *Velociraptor*.

Boluochia does not preserve a furcula.  And as Ornithothoraces is a
node-based clade defined using Iberomesornis and neornithines, "basal
ornithothoracines" with laterally grooved furculae (eg. Protopteryx and
Longipteryx) are not ornithothoracines at all.

Mickey Mortimer