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Pterosaur trackways

Hi, girls and boys!
Although I'm not a specialist in pterosaurs nor trackways, I have made some job
 on some new fossil footprints from Las Hoyas. They will be published someday (
I don't know when; the paper is in the press) in the French journal Geobios.
The prints was very surprising. We found a trackway in the site; we though it w
as a dinosaur trackway (we only see the hindfoot impressions). But we have the
enormous luck that Martin Lockley came to Spain to visit our trackway specialis
t, Joaquin Moratalla. And both of them gone to the fossil site to see the track
way. And they found the hand impressions inmediatly. The dinosaur trackway (som
ething really strange in the bottom of a lake) became the trackway of a crocodi
le walking on the bottom of the lake.
Walking around in the outcrop, Martin found two other impressions. They look ve
ry rare. They are three-fingered, about 30 cm. of lenght, but they are non sime
trical like the theropod impressions. Martin said they are pterosaur hand impre
Joaquin and me started to work on these impressions, in order to try to verify
the idea of Martin. They look like some impressions found in Cerin (France), wh
ose were interpreted like a marine turtle. But analizing the anatomy of the han
d of the pterosaurs, the idea of Martin became the most reasonable to us. And t
hey are identical to those of _Pteraichnus_,  only greaaaaaaaater!
So, we think that Pteraichnus is the trackway of some kind of pterosaur. We hav
e found some other tracks here in Spain, that look like _Pteraichnus_. It looks
 like the pterosaurs were plantigrade in the hindlimb and digitigrade in the fo
relimb, and that they folded up the wing along the forearm, in order to avoid t
he wing touch the floor. Ah! They (some of them at least) were quadrupedal.
See you! Nino.