Re: pterosaur femora sprawl [forelimb sprawl only]

[David Marjanovic <david.marjanovic@gmx.at>]

> [...] the fore limbs are portrayed as sprawling (very sprawling, often 
> with the elbow anterior to the glenoid--

This is not what the tracks of fast-walking pterosaurs show. Tracks of 
pterosaurs trampling around in one spot do show some sprawling, though.

> On the other hand, if continuously quadrupedal, then there had to have 
> been a series of taxa with an increasingly laterally-oriented manus (what 
> would have caused this??).

Flying being a stronger selection pressure than walking. Anyway, walking 
still works, see tracks mentioned above.