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.

Extant
According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Perotrochus:
 * † Perotrochus allani Marwick, 1928
 * Perotrochus amabilis (Bayer, 1963)
 * Perotrochus anseeuwi Kanazawa & Goto, 1991
 * Perotrochus atlanticus Rios & Matthews, 1968
 * Perotrochus caledonicus Bouchet & Métivier, 1982
 * Perotrochus charlestonensis Askew, 1987
 * Perotrochus deforgesi Métivier, 1990
 * Perotrochus lucaya Bayer, 1965
 * † Perotrochus maoriensis (Wilckens, 1922)
 * † Perotrochus marwicki C. A. Fleming, 1970
 * Perotrochus maureri Harasewych & Askew, 1993
 * Perotrochus metivieri Anseeuw & Goto, 1995
 * Perotrochus oishii (Shikama, 1973)
 * Perotrochus pseudogranulosus Anseeuw, Puillandre, Utge & Bouchet, 2015
 * Perotrochus quoyanus (Fischer & Bernardi, 1856)
 * Perotrochus sunderlandorum Petuch & Berschauer, 2017
 * Perotrochus tosatoi Anseeuw, Goto & Abdi, 2005
 * Perotrochus vicdani Kosuge, 1980
 * Perotrochus wareni Anseeuw, Puillandre, Utge & Bouchet, 2015
 * Species brought into synonymy:
 * Perotrochus africanus (Tomlin, 1948) : synonym of Bayerotrochus africanus (Tomlin, 1948)
 * Perotrochus boucheti Anseeuw & Poppe, 2001 : synonym of Bayerotrochus boucheti (Anseeuw & Poppe, 2001)
 * Perotrochus diliculum Okutani, 1979 : synonym of Bayerotrochus diluculum (Okutani, 1979)
 * Perotrochus gemma F. M. Bayer, 1965 : synonym of Perotrochus quoyanus quoyanus (P. Fischer & Bernardi, 1856)
 * Perotrochus gotoi Anseeuw, 1990 : synonym of Mikadotrochus gotoi (Anseeuw, 1990)
 * Perotrochus hirasei (Pilsbry, 1903) : synonym of Mikadotrochus hirasei (Pilsbry, 1903)
 * Perotrochus indicus Anseeuw, 1999 : synonym of Bayerotrochus indicus (Anseeuw, 1999)
 * † Perotrochus masoni P. A. Maxwell, 1978 : synonym of † Bayerotrochus masoni (P. A. Maxwell, 1978)
 * Perotrochus midas Bayer, 1965 : synonym of Bayerotrochus midas (Bayer, 1965)
 * Perotrochus poppei Anseeuw, 2003 : synonym of Bayerotrochus poppei Anseeuw, 2003
 * Perotrochus pyramus Bayer, 1967 : synonym of Bayerotrochus pyramus (Bayer, 1967)
 * Perotrochus tangaroanus Bouchet & Métivier, 1982 : synonym of Bayerotrochus tangaroanus (Bouchet & Métivier, 1982)
 * Perotrochus teramachii Kuroda, 1955 : synonym of Bayerotrochus teramachii (Kuroda, 1955)
 * Perotrochus westralis (Whitehead, 1987) : synonym of Bayerotrochus westralis (Whitehead, 1987)

Fossil

 * †P. allani, Red Bluff Tuff, New Zealand
 * †P. brachoi, Otekaike Limestone, New Zealand
 * †P. eocenicus, Kattachi Formation, Japan
 * †P. isseli Roverato 1900, Sassello (SV), Tertiary Piedmont Basin, Italy
 * †P. masoni Maxwell 1978, Otekaike Limestone, New Zealand (synonym of † Bayerotrochus masoni (P. A. Maxwell, 1978))
 * †P. sismondai, Alzey Formation, Germany
 * †P. (Perotrochus) hanoverensis, Castle Hayne Formation, North Carolina
 * †P. (Entemnotrochus), Capay Formation, California and Swan Cay Formation, Panama
 * †Pleurotomaria (Entemnotrochus) baldwini, P. (E.) schencki & P. (E.) siletzensis, Siletz River Volcanics, Oregon