Comment on “A high latitude vertebrate fossil assemblage from the Late Cretaceous of west-central Alberta, Canada: Evidence for dinosaur nesting and vertebrate latitudinal gradient” By F. Fanti and T. Miyashita [Palaeogeography, Palaeoclimatology, Palaeoe

A recent paper by Fanti and Miyashita (2009. A high latitude vertebrate fossil assemblage from the Late Cretaceous of west-central Alberta, Canada: Evidence for dinosaur nesting and vertebrate latitudinal gradient. Palaeogeography, Palaeoclimatology, Palaeoecology 275, 37–53) reports on a new assemblage of terrestrial vertebrate fossils from the Campanian (Late Cretaceous) of northern Alberta. In addition to the several dinosaur and microvertebrate specimens reported by Fanti and Miyashita (2009), the new assemblage also contains two mammalian teeth, identified by the authors as pertaining to “Cimolodon sp.” and “Didelphodon sp.” The taxonomic identifications of these teeth are either highly questionable or simply incorrect, and the accompanying descriptions are replete with errors; as a result of these lapses, at least part of the biogeographic conclusions drawn by the authors about the Kleskun Hills Park area is also rendered incorrect. While the discovery of a Late Cretaceous high-latitude vertebrate fauna in Alberta is unquestionably important, the significance of the Kleskun Hills mammalian taxa, both taxonomically and biogeographically, should be reconsidered.