Paryphanta superba (Powell, 1930) Powelliphanta superba is a species of large, carnivorous land snail in the family Rhytididae, which is endemic to the South Island of New Zealand.

Five subspecies are recognised,[1] all of which are classified by the New Zealand Department of Conservation as being Nationally Endangered.

[2] Powelliphanta superba was originally described as Paryphanta superba by Arthur William Baden Powell in 1930.

[3] The paratype specimens are located at Auckland War Memorial Museum.

[3] There are five subspecies of P. superba: The eggs are oval and seldom constant in dimensions 14 by 12 millimetres (0.55 in × 0.47 in).