Extinct family of dinosaurs
Cimolopterygidae is an extinct family of ornithurine dinosaurs known from the Late Cretaceous epoch.[ 2] Frenchman Formation of Saskatchewan , the Lance Formation of Wyoming , the Fox Hills Formation of Colorado , the Hell Creek Formation of Montana , and the Allen Formation of Rio Negro , Argentina . Most date to the end of the Maastrichtian age, about 66 million years ago, though a much earlier species has also been identified from the Campanian -aged Dinosaur Park Formation of Alberta , about 75 million years ago.[ 1] [ 3]
References
^ a b Federico L. Agnolin (2010). "An avian coracoid from the Upper Cretaceous of Patagonia, Argentina" . Stvdia Geologica Salmanticensia . 46 (2): 99–119. ^ Mohr, Sydney R.; Acorn, John H.; Funston, Gregory F.; Currie, Philip J. (February 2021). "An ornithurine bird coracoid from the Late Cretaceous of Alberta, Canada" . Canadian Journal of Earth Sciences . 58 (2): 134–140. Bibcode :2021CaJES..58..134M . doi :10.1139/cjes-2019-0202 . S2CID 225743064 . ^ Hope, S. (2002). "The Mesozoic radiation of Neornithes." Pp. 339-388 in Chiappe, L.M. and Witmer, L. (eds.), Mesozoic Birds: Above the Heads of Dinosaurs.
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