Opisthotropis hungtai

Opisthotropis hungtai
Holotype male
Paratype female
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Genus:	Opisthotropis
Species:	O. hungtai
Binomial name
Opisthotropis hungtai Wang et al., 2020

Opisthotropis hungtai, also known as Hung-Ta Chang's mountain keelback, is a species of snake in the family Colubridae.^[1] It is a slender, cylindrical snake with a total length of 393.2–511 cm (155–201 in), snout–vent length of 312–413 cm (123–163 in), and tail length of 81.2–180.5 cm (31.97–71.06 in). The upper side of the head is glossy dark with scattered yellow flecking, the chin shields are yellow with brownish-black mottling at the margins, and eyes are black. The body and tail are glossy dark brown with a single yellow spot on each scale, the ventral scales are yellow with brownish-black margins and flecking, and the subcaudal scales yellow with brownish-black margins. Hung-Ta Chang's mountain keelback can be distinguished from other species in its genus by a combination of its measurements, scalation, and coloration.

The species is endemic to mountainous regions in China, where it has been collected from western Guangdong and southeastern Guangxi. It inhabits rocky streams surrounded by dense deciduous forest. It is threatened by the illegal wildlife trade and requires further study to better understand its population size and distribution.