Stenonychosaurus
Stenonychosaurus is a troodontid known for one of the largest brains, relative to body mass, of any dinosaur. It was about 2.5 m in length and had long legs with large retractable claws on the second toe, similar to dromaeosaurs. Classification of the troodontid family has been convoluted, and it is likely that Stenonychosaurus is the same genus as Troodon.












