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).

Perotrochus
Apertural view of Perotrochus atlanticus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Pleurotomariida
Superfamily:	Pleurotomarioidea
Family:	Pleurotomariidae
Genus:	Perotrochus Fischer, 1885[1]
Type species
Perotrochus quoyana Fischer & Bernardi, 1856
Synonyms
Pleurotomaria (Perotrochus) Fischer 1885

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.^[2]

Species

Extant

According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Perotrochus:^[3]

• † 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^[4]