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Re: Triassic pterosaurs
If anybody has a copy of this paper it would be appreciated.
On 26 April 2013 19:51, Ben Creisler <firstname.lastname@example.org> wrote:
> From: Ben Creisler
> A new online paper:
> Fabio M. Dalla Vecchia (2013)
> Triassic pterosaurs.
> Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their
> Kin: Geological Society Special Publication 379 (advance online
> doi: 10.1144/SP379.14
> Pterosaurs are a clade of highly specialized, volant archosauromorphs
> recorded from the Upper Triassic to the uppermost Cretaceous.
> Problematic remains referred to the Pterosauria are reported from the
> Triassic of Europe and both North and South America, but unequivocal
> pterosaur specimens are only known from the Alps (Italy, Austria and
> Switzerland: Preondactylus buffarinii, Austriadactylus cristatus,
> Peteinosaurus zambellii, Eudimorphodon ranzii, Carniadactylus
> rosenfeldi, Caviramus schesaplanensis and Raeticodactylus
> filisurensis) and Greenland (‘Eudimorphodon’ cromptonellus).
> Pterosaurs are diagnosed mostly by features associated with the advent
> of powered flight. They are generally considered to be archosaurians
> more closely related to dinosaurs than to crocodilians, but
> non-archosaurian positions have also been proposed. There is a lack of
> general agreement about ingroup relationships, particularly among the
> basal pterosaurs. Triassic pterosaurs differ from other
> non-pterodactyloid pterosaurs in features of the dentition and caudal
> vertebral column. A ‘Big Bang’ model for their early history fits
> better with the fossil record: the earliest unequivocal pterosaurs
> show a sudden and geographically limited appearance in the fossil
> record, as well as a relatively high burst of diversity and
> considerable morphologic disparity. Absence of pterosaur remains from
> deposits where they are expected to be found suggests that they had
> not yet evolved in pre-Norian times.