Cyonosaurus is an extinct genus of gorgonopsian therapsid from the Late Permian to Early Triassic.
Cyonosaurus was about 0.6-1.1 metres (2 ft and 0 inches to 3 ft and 7 inches) in length with a skull measuring from 9-18 cm in length. The type species and only species discovered so far, C. longiceps, was described in 1937.
