Procalpurnus semistriatus is a species of sea snail, a marine gastropod mollusk in the family Ovulidae, the ovulids, cowry allies or false cowries. References
Pease W. H. (1863). Description of new species of marine shells from the Pacific Islands. Proceedings of the Zoological Society of London. (1862): 240–243. Cate, C. N. 1973. A systematic revision of the recent Cypraeid family Ovulidae. Veliger 15 (supplement): 1–117. Lorenz F. & Fehse D. (2009) The living Ovulidae. A manual of the families of allied cowries: Ovulidae, Pediculariidae and Eocypraeidae. Hackenheim: Conchbooks.