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Temporal range: Late Cretaceous
|Skeletal reconstruction, with missing parts based on related genera|
| †Stenonychosaurus inequalis|
Stenonychosaurus is a genus of troodontid dinosaur from the Late Cretaceous Dinosaur Park Formation of Alberta, Canada. The type and only species, S. inequalis, was named by C.M. Sternberg in 1932, based on a foot, fragments of a hand, and some caudal vertebrae from the Late Cretaceous of Alberta. S. inequalis was reassigned in 1987 by Phil Currie to the genus Troodon, which was reverted by the recognition of Stenonychosaurus as a separate genus from the dubious troodon by Aaron van der Reest and colleagues in 2017.
The recent analyses in 2017 have found the forementioned Troodn genus to being quite undiagnostic and referred several of these specimens belong the genus Stenonychosaurus; which was long believed to be synonymous with Troodon; and remaining specimens to the newly created genus Latenivenatrix.