Tosapusia turriformis is a species of sea snail, a marine gastropod mollusk, in the family Costellariidae, the ribbed miters.

[1][2] The length of the shell attains 27.1 mm.

The holotype of the species (MNHN IM-2013-19792), measured 27.15 mm.

[2] This species occurs in the Bismarck Sea, Papua New Guinea.

This Costellariidae-related article is a stub.