Cimolopterygidae is an extinct family of ornithurine dinosaurs known from the Late Cretaceous epoch.[2] Remains attributed to cimolopterygids have been found in the 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]
| Cimolopterygidae Temporal range: Late Cretaceous,
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| Left coracoid of a Cimolopteryx rara | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Avialae |
| Clade: | Ornithurae |
| Family: | †Cimolopterygidae Brodkorb, 1963 |
| Type species | |
| †Cimolopteryx rara Marsh, 1892
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| Genera[1] | |
References
edit- ^ 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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