Megalovalvata baicalensis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails. Distribution This species occurs in lake Baikal in depths from 3 to 50 m, and in the Angara River in Russia. The type locality is Lake Baikal ("Baikalsee"). Habitat This snail lives in freshwater habitats. References External links Valvatidae Gastropods described in 1859 Fauna of Lake Baikal