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Arctic dinosaurs from Yukon Territory, Canada



From: Ben Creisler
bcreisler@gmail.com

A new online paper:


David C. Evans, Matthew J. Vavrek, Dennis R. Braman, Nicolás E.
Campione, T. Alexander Dececchi & Grant D. Zazula (2012)
Vertebrate fossils (Dinosauria) from the Bonnet Plume Formation, Yukon
Territory, Canada.
Canadian Journal of Earth Sciences (advance online publication)
doi: 10.1139/e11-064
http://www.nrcresearchpress.com/doi/abs/10.1139/e11-064



Dinosaurs and other terrestrial vertebrates are poorly documented in
the Mesozoic of the Canadian polar region. Here, we provide a complete
review of the Upper Cretaceous (Maastrichtian) vertebrate fauna of the
Bonnet Plume Formation in the northeastern Yukon Territory, Canada,
which includes the description of the first newly collected dinosaur
bones from this unit in almost half a century. Previously reported
fragmentary dinosaur remains collected in the early 1960’s pertain to
an indeterminate hadrosaurid. New material includes a poorly preserved
forelimb bone and a pedal phalanx. These new remains pertain to at
least one species of non-hadrosaurid ornithischian dinosaur, and the
humerus is tentatively referred to a small-bodied basal ornithopod.
The new vertebrate fossils from the Bonnet Plume Formation provide
further evidence of vertebrates from this unit. However, directed
field surveys in 2008 and 2009 suggest that vertebrate fossils are not
abundant. A review of the known localities of terrestrial Mesozoic
vertebrates from the Canadian Arctic indicate that it had a relatively
diverse community of terrestrial vertebrates, including dinosaurs,
during the Late Cretaceous, but emphasizes our limited knowledge of
the Mesozoic Arctic and considerable potential for future exploration
and discovery.