Semperoncis

Semperoncis is a genus of air-breathing sea slugs, a shell-less marine pulmonate gastropod mollusks in the family Onchidiidae.

Species
According to the World Register of Marine Species (WoRMS), the following species with a valid name are included within the genus Semperoncis:
 * Semperoncis glabra (Semper, 1885)
 * Semperoncis huberti (Labbé, 1934) (nomen dubium)
 * Semperoncis montana (Plate, 1893)