# 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:
* † 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