Re: wing extensor placement on pterosaurs

[John Conway <john.a.conway@gmail.com>]

David Peters wrote:

> Still hanging out here in St. Louis waiting to see how anyone can get 
> metacarpals I-III to move _above_ the wing finger extensor when they are 
> clearly ventral to it in primitive pterosaurs, as demonstrated by 
> Wellnhofer 1991. I think you can't get there from here.

Wait a second Dave - unless I've missed your point - all I see there is 
Wellnhofer drawing the fingers in that position - he doesn't 
"demonstrate" it. Wellnhofer could be wrong (indeed, I think he was 
wrong about this).

> Also, no thoughts on Wellnhofer's reconstruction of  digits I-III 
> torsioned 90 degrees anteriorly on the standard configuration metacarpals?

I vote wrong on that too.

Cheers,
John