Gonyosoma

Gonyosoma is a genus of snakes in the family Colubridae. The genus is endemic to South Asia.

==Description== There are a few distinct morphological characteristics that distinguish Gonyosoma from Elaphe. In scutellation there are 2-3 supralabials that contact the eye, with typically two in G. oxycephalum, and three in G. jansenii. The supralabial at the posterior of the eye is highly arched around the back of the eye. The loreal scale is thin and elongate, and appears stretched between the preocular and the nasal. Other diagnostic features is an elongate left rudimentary lung (70–141 mm), and a distinct hemipenes structure.