තෙලිස්සන් ගණය

Species
SpeciesTaxon authorCommon nameGeographic rangeH. hypnaleT(Merrem, 1820)Hump-nosed viperPeninsular India to the Western Ghats as far north as 16° N, and Sri Lanka.H. nepa(Laurenti, 1768)Sri Lankan hump-nosed viperIn Sri Lanka throughout forested areas, from lowland rainforest to over  altitude.H. zara(Gray), 1849Gray's hump-nosed viperSri Lanka.
T) Type species.

A new species called Hypnale sp. Amal, recently described, but not yet given species status.