''Perotrochus'' is a genus of large

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

s with gills and an operculum,

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusks in the family

Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of the subclass Vetigastropoda. This family is a very ancient lineage; there were numerous species in the geological pas ...

, 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

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s 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'':WoRMS : Perotrochus; accessed : 9 September 2010
/ref> * † '' Perotrochus allani'' Marwick, 1928 * ''

Perotrochus amabilis ''Perotrochus amabilis'', common name the lovely slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae. Description The length of the shell varies between 50 mm and 93 mm. Distribution This ...

'' (

Bayer Bayer AG (, commonly pronounced ; ) is a German multinational corporation, multinational pharmaceutical and biotechnology company and one of the largest pharmaceutical companies in the world. Headquartered in Leverkusen, Bayer's areas of busi ...

, 1963) * ''

Perotrochus anseeuwi ''Perotrochus anseeuwi'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Perotrochus anseeuwi'' Kanazawa & Goto, 1991. Accessed through: World Register of Marine S ...

'' Kanazawa & Goto, 1991 * '' Perotrochus atlanticus'' Rios & Matthews, 1968 * ''

Perotrochus caledonicus ''Perotrochus caledonicus'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Mikadotrochus caledonicus'' (Bouchet & Métivier, 1982). Accessed through: World Regist ...

'' Bouchet & Métivier, 1982 * ''

Perotrochus charlestonensis ''Bayerotrochus charlestonensis'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleuroto ...

'' Askew, 1987 * ''

Perotrochus deforgesi ''Perotrochus deforgesi'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Perotrochus deforgesi''. Accessed through: World Register of Marine Species at http://www ...

'' Métivier, 1990 * ''

Perotrochus lucaya ''Perotrochus lucaya'', common name the Lucayan slit shell, is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods i ...

, 1965 * † '' Perotrochus maoriensis'' (Wilckens, 1922) * † '' Perotrochus marwicki'' C. A. Fleming, 1970 * ''

Perotrochus maureri ''Perotrochus maureri'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea ...

'' Harasewych & Askew, 1993 * ''

Perotrochus metivieri ''Perotrochus metivieri'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioide ...

'' Anseeuw & Goto, 1995 * ''

Perotrochus oishii ''Perotrochus oishii'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Perotrochus oishii'' (Shikama, 1973). Accessed through: World Register of Marine Species at ...

'' (Shikama, 1973) * ''

Perotrochus pseudogranulosus ''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 ...

'' Anseeuw, Puillandre, Utge & Bouchet, 2015 * ''

Perotrochus quoyanus ''Perotrochus quoyanus'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P.; Rosenberg, G. (2012). ''Perotrochus quoyanus'' (P. Fischer & Bernardi, 1856). Accessed through: Wor ...

'' ( Fischer & Bernardi, 1856) * ''

Perotrochus sunderlandorum ''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 ...

'' Petuch & Berschauer, 2017 * ''

Perotrochus tosatoi ''Perotrochus tosatoi'' is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of t ...

'' Anseeuw, Goto & Abdi, 2005 * ''

Perotrochus vicdani ''Perotrochus vicdani'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea ...

'' Kosuge, 1980 * ''

Perotrochus wareni ''Perotrochus'' is a genus of large sea snails with gills and an operculum (gastropod), operculum, marine (ocean), marine gastropod mollusks in the family Pleurotomariidae, the slit snails, (according to the Taxonomy of the Gastropoda (Bouchet & ...

'' Anseeuw, Puillandre, Utge & Bouchet, 2015 ;Species brought into synonymy: * ''Perotrochus africanus'' (Tomlin, 1948): synonym of ''

Bayerotrochus africanus ''Bayerotrochus africanus'', common name the South African slit shell, is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae. Description The shell grows to a length of 120 mm. Distribution This species is ...

'' (Tomlin, 1948) * ''Perotrochus boucheti'' Anseeuw & Poppe, 2001: synonym of ''

Bayerotrochus boucheti ''Bayerotrochus boucheti'' is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of ...

'' (Anseeuw & Poppe, 2001) * ''Perotrochus diliculum'' Okutani, 1979: synonym of ''

Bayerotrochus diluculum ''Bayerotrochus diluculum'', common name the dawn slit shell, is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Bayerotrochus diluculum'' (Okutani, 1979). Accesse ...

'' (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 ''Mikadotrochus gotoi'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Mikadotrochus gotoi'' (Anseeuw, 1990). Accessed through: World Register of Marine Species a ...

'' (Anseeuw, 1990) * ''Perotrochus hirasei'' (Pilsbry, 1903): synonym of ''

Mikadotrochus hirasei ''Mikadotrochus hirasei'', common name the emperor's slit shell, is a species of large deepwater sea snail, a marine gastropod mollusk in the family (biology), family Pleurotomariidae, the slit snails. Description The shell has a typical trocho ...

'' (Pilsbry, 1903) * ''Perotrochus indicus'' Anseeuw, 1999: synonym of ''

Bayerotrochus indicus ''Bayerotrochus indicus'' is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Bayerotrochus indicus'' (Anseeuw, 1999). Accessed through: World Register of Marine S ...

'' (Anseeuw, 1999) * † ''Perotrochus masoni'' P. A. Maxwell, 1978: synonym of † '' Bayerotrochus masoni'' (P. A. Maxwell, 1978) * ''Perotrochus midas'' Bayer, 1965: synonym of ''

Bayerotrochus midas ''Bayerotrochus midas'', common name ''King Midas's slit shell'', is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods ...

'' (Bayer, 1965) * ''Perotrochus poppei'' Anseeuw, 2003: synonym of ''

Bayerotrochus poppei ''Bayerotrochus poppei'' is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of t ...

'' Anseeuw, 2003 * ''Perotrochus pyramus''

, 1967: synonym of ''

Bayerotrochus pyramus ''Bayerotrochus pyramus'', common name the pyramus slit shell, is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.Bouchet, P. (2012). ''Bayerotrochus pyramus'' (Bayer, 1967). Accessed th ...

'' (Bayer, 1967) * ''Perotrochus tangaroanus'' Bouchet & Métivier, 1982: synonym of ''

Bayerotrochus tangaroanus ''Bayerotrochus tangaroanus'', or Tangaroan slit shell, is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae. Description The shell has a typical trochoid shape with a spire angle of approximately 90 degrees an ...

'' (Bouchet & Métivier, 1982) * ''Perotrochus teramachii'' Kuroda, 1955: synonym of ''

Bayerotrochus teramachii ''Bayerotrochus teramachii'', is a species of sea snail, a marine gastropod mollusc in the family Pleurotomariidae. Description The shell has a depressed turbinate shape with an apical spire angle of approximately 98 degrees, with inflated bo ...

'' (Kuroda, 1955) * ''Perotrochus westralis'' (Whitehead, 1987): synonym of ''

Bayerotrochus westralis ''Bayerotrochus westralis'', commonly known as "Australia's split shell", is a species of sea snail, a marine gastropod mollusk in the family (biology), family Pleurotomariidae. Description The shell has a turbinate shape with an apical spire ...

'' (Whitehead, 1987)

Fossil

* †''P. allani'' , Red Bluff Tuff, New Zealand * †''P. brachoi'' , Otekaike Limestone, New Zealand * †''P. eocenicus'' , Kattachi Formation, Japan * †''P. isseli'' , Sassello (SV), Tertiary Piedmont Basin, Italy * †''P. masoni'' , Otekaike Limestone, New Zealand (synonym of † ''Bayerotrochus masoni'' (P. A. Maxwell, 1978)) * †''P. sismondai'' ,

Alzey Formation The Alzey Formation is a geologic formation in Germany. It preserves fossils dating back to the Paleogene period. See also * List of fossiliferous stratigraphic units in Germany See also * Lists of fossiliferous stratigraphic units in E ...

, Germany * †''P. (Perotrochus) hanoverensis'',

Castle Hayne Formation A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified ...

, North Carolina * †''P. (Entemnotrochus)'',

Capay Formation The Capay Formation is a geologic formation in Yolo County, western Sacramento Valley, California. It preserves fossils dating back to the Paleogene period. See also * List of fossiliferous stratigraphic units in California This article con ...

, California and Swan Cay Formation, Panama * †''Pleurotomaria (Entemnotrochus) baldwini'', ''P. (E.) schencki'' & ''P. (E.) siletzensis'',

Siletz River Volcanics The Siletz River Volcanics, located in the Oregon Coast Range, United States, are a sequence of basaltic pillow lavas that make up part of Siletzia.Fischer, P. (1880-1887). Manuel de conchyliologie et de paléontologie conchyliologique, ou histoire naturelle des mollusques vivants et fossiles suivi d'un Appendice sur les Brachiopodes par D. P. Oehlert. Avec 23 planches contenant 600 figures dessinées par S. P. Woodward.. Paris: F. Savy. Published in 11 parts (fascicules), xxiv + 1369 pp., 23 pls
{{Taxonbar, from=Q3127107 Pleurotomariidae