Paratapinophis

Paratapinophis is a monotypic genus of snake in the subfamily Natricinae of the family Colubridae. The genus contains the sole species Paratapinophis praemaxillaris, also known commonly as Angel's mountain keelback, Angel's stream snake, and the brown stream snake. The species is endemic to Southeast Asia.
Geographic range.
"P. praemaxillaris" is found in China (Yunnan province), northern Laos, and Thailand.
Habitat.
The preferred natural habitats of "P. praemaxillaris" are forest and freshwater wetlands, at altitudes of .
Description.
Dorsally, "P. praemaxillaris" is brown. Ventrally, it is dirty yellowish. The dorsal scales are smooth and are in 19 rows at midbody.
Diet.
"P. praemaxillaris" preys upon aquatic annelids.
Reproduction.
"P. praemaxillaris" is oviparous. The cotypes are hatchlings, each with an egg-tooth and a fresh umbilical scar. Each of these little snakes has a total length of , which includes a tail long.