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Ornithomimid Bonebed from Late Cretaceous of Alberta

From: Ben Creisler

New in PLoS ONE:

Thomas M. Cullen, Michael J. Ryan, Claudia Schröder-Adams, Philip J.
Currie & Yoshitsugu Kobayashi (2013)
An Ornithomimid (Dinosauria) Bonebed from the Late Cretaceous of
Alberta, with Implications for the Behavior, Classification, and
Stratigraphy of North American Ornithomimids.
PLoS ONE 8(3): e58853.

Bonebeds can provide a wealth of anatomical, taphonomic, and
ontogenetic information about the specimens preserved within them, and
can provide evidence for inferred behavior. The material described
here represents the first known bonebed of ornithomimids in North
America, and the fourth record of an ornithomimosaur bonebed in the
world. Partial skeletons representing three individuals are preserved
in this assemblage, each comprising primarily portions of the
posterior postcrania (pelvis, hind limbs and tail). All three
individuals are morphologically similar, although one is larger in
overall size. Given the stratigraphic position of the site, and the
morphology of the postcrania, the preserved material represents a
taxon from the clade containing Ornithomimus and Struthiomimus. Pedal
ungual morphology is examined and found to be too variable to be
useful in distinguishing these species taxonomically. This site
provides additional evidence of gregarious behavior in ornithomimids
and the first probable record of that behavior in North American