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Re: Pterosaur tracks from Alaska

Ben Creisler

A related news item not yet mentioned:

Rare Pterosaur Tracks Discovered in Alaska’s Denali National Park


On Tue, Oct 7, 2014 at 2:45 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> A new online paper:
> A.R. Fiorillo, Y. Kobayashi, P.J. McCarthy, T.C. Wright & C.S. Tomsich (2014)
> Pterosaur tracks from the Lower Cantwell Formation
> (Campanian–Maastrichtian) of Denali National Park, Alaska, USA, with
> comments about landscape heterogeneity and habit preferences.
> Historical Biology (advance online publication)
> DOI:10.1080/08912963.2014.933213
> http://www.tandfonline.com/doi/full/10.1080/08912963.2014.933213#.VDRdlfldXTo
> We report on new records of pterosaur tracks from Alaska. Recent
> palaeontological investigations in the Lower Cantwell Formation of
> Denali National Park, central Alaska Range, Alaska, had resulted
> previously in the discovery of a single pterosaur manus track.
> Subsequent and ongoing investigation has shown that the track record
> for pterosaurs in this region is more robust. These new pterosaur
> records comprise large and small traces. The larger tracks are up to
> approximately 18 cm long and 6 cm wide. The smaller tracks are
> approximately 6 cm long and 4 cm wide. The assemblage of pterosaur
> traces from Denali National Park consists of manus impressions. The
> morphology of the pterosaur traces found in the Lower Cantwell
> Formation compares favourably with the morphology of the ichnogenus
> Pteraichnus. The presence of two very different body sizes of
> pterosaurs, along with the abundant record of fossil bird tracks,
> indicates the presence of ecological complexity among aerial
> vertebrates during the time that the sediments of the Lower Cantwell
> Formation were deposited. Sedimentological and palaeobotanical data,
> combined with the vertebrate ichnology record, offer details into how
> these aerial vertebrates were separated within this heterogenetic
> ecosystem.
> ===
> Also, the following advance paper (posted earlier) is now in open access:
> Fabio M. Dalla Vecchia, Robert Bosch, Josep Fortuny & Àngel Galobart (2014)
> The pterodactyloid pterosaur from the Lower Cretaceous of Brazil at
> the CosmoCaixa Science Museum (Barcelona, Spain).
> Historical Biology (advance online publication)
> DOI:10.1080/08912963.2014.961449
> http://www.tandfonline.com/doi/full/10.1080/08912963.2014.961449#.VC1u-PldXTo