Viperidae

Hypnale zara is an ovoviviparous species with distinct scale patterns and coloration as described here.

Gloydius ussuriensis is a venomous pitviper found in far east Russia, northeastern China, the Korean Peninsula, and Quelpart Island.

Gloydius himalayanus is a highland pit viper living along southern Himalayan slopes, the only pit viper found in Pakistan.

Gloydius halys is a moderately stout pit viper with a defined physical description and known geographic range across central and East Asia.

Gloydius blomhoffii is one of Japan's most venomous pit vipers, found in a range of Japanese habitats.

Gloydius brevicauda is a short-tailed stout viper found in northeast China and the Korean Peninsula.

This is a description of Gloydius intermedius, covering its physical traits, scalation, coloration and geographic range.

Metlapilcoatlus borealis is a medium-sized viper species first described in 2021, identifiable by specific scale features and unique genetic markers.

Metlapilcoatlus mexicanus is an extremely stout-bodied species ranging from southern Mexico to Panama.

Craspedocephalus borneensis is a Bornean pit viper with variable coloration, found in low-elevation forests.

Craspedocephalus gramineus, the Bamboo Pit Viper, is a venomous arboreal ovoviviparous snake widespread in peninsular India.

Craspedocephalus macrolepis is a large-scaled arboreal viper endemic to high elevation southern Western Ghats, India.

Craspedocephalus malabaricus, the Malabar pit viper, is a venomous snake endemic to the Western Ghats of India.

Craspedocephalus puniceus is a reptile species found across parts of Thailand, Malaysia, and Indonesia with distinct physical and scalation traits.

Craspedocephalus trigonocephalus is an endemic Sri Lankan arboreal, viviparous, sexually dimorphic pit viper.

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