Fw: pterosaur femora sprawl

[David Peters <davidpeters@att.net>]

> > > True. But no pterosaurs walked, bipedally or quadrupedally, with a 
> > > horizontal backbone.
> > 
> > Quetzalcoatlus can, due to the remarkable bony support shelves at the 
> > shoulder and elbow that carry the weight when the elbow is raised well 
> > above 
> > the shoulder..  However, that doesn't mean that they did -- walking in that 
> > configuration requires a reversal of the normal direction of the walking 
> > shoulder articulation.
> 
> Every pterosaur could get their backbone horizontal. That's how they rested. 
> As 
> you suggest, walking requires an elevation of the shoulder to align the axes 
> and 
> match the tracks.
> > 

> 
> > 
> > Are you saying that azhdarchids were not soarers? 
> 
> You're reading too much into it. I think the question was about which were 
> the 
> beachcoming taxa, the kind that had flat feet and made prints. 
> 
> 
> > JimC 

DP