Hypnale nepa, the Sri Lankan hump-nosed viper, is a venomous pitviper species endemic to Sri Lanka where it is known as මූකලන් තෙලිස්සා (mukalan thelissa) in Sinhala. Earlier thought that Hypnale walli and Hypnale nepa were two distinct species, but it is now accepted that it is the same species and Hypnale walli is a synonym name. Relatively small, they are distinguished by a strongly upturned snout. No subspecies are currently recognized.
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