Snails are members of the molluscan class Gastropoda which have coiled shells in the adult stage. Molluscs are the second largest invertebrate group in abundance next only to insects
Like some of the lower vertebrates such as amphibians and reptiles, land snails also shows very high percentage of endemicity. 204 species out of 269 species are endemic, which is almost 76% of the land snail fauna of Western Ghats. Western Ghats harbours 92% and 41% of the family and genera respectively occur in India
Indrella ampulla (Benson) is a monotypic Ariophantid genus endemic to wet forests in the Western Ghats, India. The shell is delicate being mostly protinaceous with a relatively low calcium carbonate content; the body exhibits dymantic colour polymorphism..