Perotrochus
Perotrochus is a genus of large sea snails with gills and an operculum, marine gastropod mollusks in the family Pleurotomariidae, the slit snails, (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Description. The shell has a conical shape. The base is not umbilicated. The whorls are striate or granulate. The anal fasciole is submedian or below the middle. The slit is short. Species. Extant. According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus "Perotrochus":