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Tracks of dinosaurs, mammals, and reptiles from the Late Cretaceous Wapiti Formation, Alberta, Canada



From: Ben Creisler
bcreisler@gmail.com

A new online paper:

Federico Fanti, Phil R. Bell & Robin L. Sissons (2013)
A diverse, high-latitude ichnofauna from the Late Cretaceous Wapiti
Formation, Alberta, Canada.
Cretaceous Research (advance online publication)
http://dx.doi.org/10.1016/j.cretres.2012.12.010
http://www.sciencedirect.com/science/article/pii/S0195667113000086



The Wapiti Formation in west-central Alberta preserves one of the most
diverse Late Cretaceous terrestrial track records yet identified in
Canada. At least seven morphotypes are recognized and attributed to
mammals, small reptiles or amphibians, tyrannosaurids, medium-sized
theropods, hadrosaurids, and ankylosaurs. Most tracks occur isolated
on slump blocks associated with latest Campanian (Wapiti Formation
unit 4) exposures found along Pipestone Creek and Red Willow River.
With the possible exception of hadrosaurids, tracks provide some of
the most compelling evidence for the occurrence of such taxa within
the Wapiti Formation ecosystem. The apparent absence of ceratopsian
tracks is surprising considering their bones are abundantly preserved
in nearby monodominant bonebeds. The overall faunal signal represented
by the Wapiti Formation trackmakers is typical of and consistent with
other coeval assemblages in similar environments. The Wapiti Formation
tracks, combined with the known fossil bone record, provide another
data point in a growing palaeobiogeographical picture of the dinosaur
faunas of high-latitude northwestern North America during the Late
Cretaceous.