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Re: pteros have lift-off
Augusto Haro wrote:
> True, do not deny that, but say that you have less steps
> Ornithodira as primitively bipedal (I mean, bipedalism
> appearing at
> the most basal node within Ornithodira) and Pterosauria
> bipedal too,
> than admitting a quadrupedal Pterosauria.
But Augusto, we know from trackways that pterosaurs used quadrupedal
terrestrial locomotion. The question is: did pterosaurs acquire this gait
*before* the advent of aerial locomotion, or only after they became fliers?
Bennett, S.C. (1997). Terrestrial locomotion of pterosaurs: A reconstruction
based on _Pteraichnus_ trackways. J. Vert. Paleontol. 17: 104â113.
Padian, K. (2003). Pterosaur stance and gait and the interpretation of
trackways. Ichnos 10: 115â126.