[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

RE: AT LAST!! Wing Assisted Incline Running (long)



> From: James R. Cunningham [mailto:jrccea@bellsouth.net]
>
> Thomas R. Holtz, Jr. wrote:
>
> > Some of my own thoughts follow:
> > The initial form of the Ostrom version of the cursorial scenario of bird
> > flight was this: the hindlimbs of birds remains a perfectly good running
> > organ, rather than being incorporated into the flight mechanism
> (as in bats
> > and pterosaurs).
>
> I wouldn't bet that in all pterosaurs, the hindlimb is always
> incorporated into the main wing.  In some cases, I would bet that it
> isn't.  However, I would also bet that it is always part of "A" flight
> mechanism.
>
Agreed.  An important question would be what the ancestral condition in
Pterosauria was with regards to degree of incorporation of the hindlimbs in
the wing.

                Thomas R. Holtz, Jr.
                Vertebrate Paleontologist
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
                College Park, MD  20742
http://www.geol.umd.edu/~tholtz/tholtz.htm
http://www.geol.umd.edu/~jmerck/eltsite
Phone:  301-405-4084    Email:  tholtz@geol.umd.edu
Fax (Geol):  301-314-9661       Fax (CPS-ELT): 301-405-0796