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Re: At long last! Turner, Makovicky & Norell on dromaeosaurids
> But this was difficult for cursorial animals that still had a
> fairly cranial center of mass, and hip-based stride generation, and
> needed a long tail for balance.
Oops, that should be "caudal", not "cranial".
Jaime Headden <firstname.lastname@example.org> wrote:
> Consider at least that, if Senter's analysis is correct (as has been followed
> since), *Incisivosaurus gauthieri* should have a postcrania much like that of
> robusta*: short tail, longish neck, lanky legs, and relatively long arms.
> Compared to the body proportions of microraptorians, which have a very long
> tail to compensate their
> total body length. I'm not quite sure about the effectiveness of even large
> sterna when they are not fused to one another, and if we presume this is the
> adult condition (size
> disparity may suggest this wasn't the case), the shoulder apparatus would
> have been highly unstable for holding the limbs out for any sort of sustained
> flapping or even
But is the shoulder apparatus of _Protarchaeopteryx_ any less stable
than that of _Archaeopteryx_ and _Microraptor_? I wouldn't have
thought so. They're all about the same. It is isn't until the level
of _Jeholornis_ that we see any real reinforcement of the shoulder