Sinonyx ("Chinese Claw") was a wolf-like ungulate Mesonychid mammal from the late Paleocene of China that lived about 56 million years ago. It was an early primitive form of mesonychid, which some experts regard as a distinctive group of carnivorous condylarths, which gave rise to artiodactyls. Sinonyx was discovered in the Anhui province, China (30°54′N 120°54′E / 30.9°N 120.9°E, paleocoordinates 33°54′N 113°36′E / 33.9°N 113.6°E).