Atrociraptor
Atrociraptor | |
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Skeletal diagram showing known remains | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | Saurischia |
Clade: | Theropoda |
Family: | †Dromaeosauridae |
Clade: | †Eudromaeosauria |
Subfamily: | †Saurornitholestinae |
Genus: | †Atrociraptor Currie & Varricchio, 2004 |
Species: | †A. marshalli
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Binomial name | |
†Atrociraptor marshalli Currie & Varricchio, 2004
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Atrociraptor (meaning "savage thief"
The
In 2004 Philip J. Currie and David Varricchio named and described the type species of Atrociraptor: Atrociraptor marshalli. The generic name is derived from the Latin atrox, "savage", and raptor, "seizer". The specific name honours Marshall.[1]
Atrociraptor was a relatively small dromaeosaur, measuring 2 m (6.6 ft) long and weighing 15 kg (33 lb).[5] It differs from Bambiraptor and other Dromaeosaurids in its more isodont dentition—the teeth have different sizes but the same form—and short deep snout. A skull opening, the maxillary fenestra, is relatively large and positioned right above another opening, the promaxillary fenestra, a condition not known from other species.
Atrociraptor was by its describers assigned to the Velociraptorinae within a larger Dromaeosauridae. However, in 2009 Currie published a cladistic analysis showing Atrociraptor to be a member of the Saurornitholestinae.[6] A 2022 study and analysis further vindicates this position and classifies Atrociraptor as a derived saurornitholestine, along with Acheroraptor.[7]
See also
References
- ^ a b Currie, P. J. and D. J. Varricchio (2004). "A new dromaeosaurid from the Horseshoe Canyon Formation (Upper Cretaceous) of Alberta, Canada". Pp. 112–132 in P. J. Currie, E. B. Koppelhus, M. A. Shugar and J. L. Wright. (eds.), Feathered Dragons. Indianapolis: Indiana University Press. [1]
- ^ Larson, D. W., Brinkman, D. B., & Bell, P. R. (2010). Faunal assemblages from the upper Horseshoe Canyon Formation, an early Maastrichtian cool-climate assemblage from Alberta, with special reference to the Albertosaurus sarcophagus bonebed This article is one of a series of papers published in this Special Issue on the theme Albertosaurus. Canadian Journal of Earth Sciences, 47(9), 1159-1181.
- S2CID 220429286.
- ^ Ryan, M. J., P. J. Currie, et al. (1998). "Baby hadrosaurid material associated with an unusually high abundance of Troodon teeth from the Horseshoe Canyon Formation, Upper Cretaceous, Alberta, Canada". Gaia 16: 123–133
- ^ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 136
- ^ N.R. Longrich and P.J. Currie, 2009, "A microraptorine (Dinosauria-Dromaeosauridae) from the Late Cretaceous of North America". Proceedings of the National Academy of Sciences 106: 5002-5007
- S2CID 247039404.