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Boreonykus, new dromaeosaurid from Late Cretaceous of Alberta
A new paper:
Phil R. Bell & Philip J. Currie (2015)
A high-latitude dromaeosaurid, Boreonykus certekorum, gen. et sp. nov.
(Theropoda), from the upper Campanian Wapiti Formation, west-central
Journal of Vertebrate Paleontology (advance online publication)
Dromaeosaurids were rare components of most Late Cretaceous
terrestrial ecosystems and are poorly known from high palaeolatitudes.
New dromaeosaurid material, including a frontal and associated
postcranial elements, is described from a dense monodominant
ceratopsid bonebed on Pipestone Creek, near the city of Grande Prairie
(Unit 3, Wapiti Formation, upper Campanian), central-western Alberta,
Canada. This stratigraphic interval is significant because it records
a period of terrestrial deposition at a time when much of the western
interior of Canada and the United States was inundated by the Bearpaw
Sea. A phylogenetic analysis recovers Boreonykus certekorum, gen. et
sp. nov., as a derived eudromaeosaur, possibly within
Velociraptorinae. The identification of a new dromaeosaurid from the
Wapiti Formation simultaneously helps fill an important gap in the
record of late Campanian dromaeosaurids, bolsters support for a partly
endemic fauna within the Wapiti Formation, and potentially adds to the
North American record of a predominantly Asian Velociraptorinae.