Sinonyx
Sign in to saveSinonyx ("Chinese claw") is a genus of extinct, superficially wolf-like mesonychid mammals from the late Paleocene of China (about 56 million years ago). It is within the family Mesonychidae, and cladistic analysis of a skull of Sinonyx jiashanensis identifies its closest relative as Ankalagon. S. jiashanensis was discovered in Anhui province, China (, paleocoordinates ), in the Tuijinshan formation.
Article
4 sectionsContents
- Description
- Morphologic similarities between ''Sinonyx'' and cetaceans
- Notes
- References
Sinonyx ("Chinese claw") is a genus of extinct, superficially wolf-like mesonychid mammals from the late Paleocene of China (about 56 million years ago). It is within the family Mesonychidae, and cladistic analysis of a skull of Sinonyx jiashanensis identifies its closest relative as Ankalagon. S. jiashanensis was discovered in Anhui province, China (, paleocoordinates ), in the Tuijinshan formation.
==Description== left|thumb|249x249px|Holotype skull and jaws (IVPP V10760), Paleozoological Museum of China Sinonyx was about 1.5 m (5 ft) long, about the size of a modern grey wolf with a large elongated head, short legs, digitigrade feet adapted for running, and tiny hooves on all of its toes. The tooth count was 3.1.4.3=44, the primitive mammalian number. The canines were long and slender. Compressed teeth with shearing notches in the lower jaw operated against multiple-cusped molars in the upper. The large skull had an extended occipital bone and large sagittal crest that contained the small brain typical of early mammals. The sagittal crest gave expanded attachment for the temporalis muscles; Sinonyx had a powerful bite.