Craspedocephalus puniceus is a venomous pit viper species endemic to Southeast Asia. Common names include: flat-nosed pitviper, flat-nosed pit viper, and ashy pit viper. No subspecies are recognized as being valid.
Adults of Craspedocephalus puniceus may attain a total length of , which includes a prehensile tail long.
Dorsally, C. puniceus is gray, brown, or red, with dark blotches or crossbars, which may merge to form an undulating stripe. On each side of the head, behind the eye, is a light streak. Ventrally, it is powdered with dark brown, and usually has lateral series of yellowish spots. The body length depends on the gender. The adult male body ranges from and the adult female body in length.
Scalation includes 21âÂÂ23 rows of dorsal scales at midbody, 158âÂÂ173 ventral scales, 41âÂÂ56 subcaudal scales, and 10âÂÂ13 supralabial scales. The dorsal scales are weekly keeled, and the anal plate is entire.
Craspedocephalus puniceus can be found on Java and southern Sumatra. Envenomation is still a relatively major issue in certain parts of the world. One major area affected by envenomation is Asia. Through the study of the venom excreted by C. puniceus, we can potentially observe and find the effects of the venom based on the concentration and amount received. Research has shown that the higher the concentration of the venom, the greater the effect on the red blood cells.
Crasspedocephalus puniceus is found in southern Thailand, West and East Malaysia (Sabah and Sarawak), and Indonesia (Borneo, Sumatra, the Mentawai Islands of Siberut and North Pagai, Simalur, and Java). The type locality given is "Java".