Cochliopidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. Paludestrina is an archaic synonym, and has been placed on the Official Index of Rejected and Invalid Names by ICZN Opinion 2202.
This family is in the superfamily Truncatelloidea and in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
Cochliopidae snails are characterized by sharp, elongated spire-like structures, and can be found in rivers or brackish water.
The family Cochliopidae consists of 3 subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005):
Cochliopinae Tryon, 1866 - synonyms: Mexithaumatinae D. W. Taylor, 1966, Paludiscalinae D. W. Taylor, 1966Littoridininae Thiele, 1928Semisalsinae Guiusti & Pezzoli, 1980 - synonym: Heleobiini Bernasconi, 1991Liu et al. (2001) have recognized 34 genera with more than 260 species within the subfamily Cochliopinae.
Strong et al. (2008) have recognized 246 freshwater species within Cochliopidae.
Genera within the family Cochliopidae include:
subfamily Cochliopinae
Aphaostracon F. G. Thompson, 1968Coahuilix D. W. Taylor, 1966Cochliopa Stimpson, 1865 - type genus of the family CochliopidaeCochliopina Morrison, 1946subfamily Littoridininae
Antrobia Hubricht, 1971 - with the only species Antrobia culveri Hubricht, 1971 - Tumbling Creek cavesnailLittoridina Souleyet, 1852Pseudotryonia Hershler, 2001Pseudotryonia adamantinaPseudotryonia alamosaePseudotryonia brevissimaPseudotryonia grahamaePseudotryonia mica Hershler, Liu & Landye, 2011Pseudotryonia pasajae Hershler, Liu & Landye, 2011subfamily Semisalsinae - there are three genera in the subfamily Semisalsinae
Heleobia Stimpson, 1865Heleobops Thompson, 1968Semisalsa Radoman, 1974subfamily ? (either Cochliopinae or Littoridininae)
Aroapyrgus H. B. Baker, 1931Balconorbis Hershler & Longley, 1986† Carinulorbis Yen, 1949Chorrobius Hershler, Liu & Landye, 2011Dyris Conrad, 1871 - it has extant species and also 26 species in Miocene Pebas FormationEmmericiella Pilsbry, 1909Eremopyprgus Hershler, 1999† Feliconcha Wesselingh, Anderson & Kadolsky, 2006 - two species from Miocene of the Pebas FormationFeliconcha feliconcha Wesselingh, Anderson & Kadolsky, 2006Feliconcha reticulata Wesselingh, Anderson & Kadolsky, 2006(probably extant) Glabertryonia Wesselingh, Anderson & Kadolsky, 2006 - three species† Glabertryonia glabra Wesselingh, Anderson & Kadolsky, 2006 - from Miocene of the Pebas Formation† Glabertryonia sp. 1 - from Pliocene of the Las Piedras Formation(probably extant) Glabertryonia sp. 2 - from Holocene of Surinam, probably extantJuturnia Hershler, Liu & Stockwell, 2002Lithococcus Pilsbry, 1911Mesobia F. G. Thompson & Hershler, 1991Mexipyrgus D. W. Taylor, 1966Minckleyella Hershler, Liu & Landye, 2011 - with the only species Minckleyella balnearis Hershler, Liu & Landye, 2011Onobops Thompson, 1968Pyrgophorus Ancey, 1888Sioliella Haas, 1949Spurwinkia Davis, Mazurkiewicz & Mandracchia, 1982Texadina Abbott & Ladd, 1951Thalassobia Bourguignat in Mabille, 1877A cladogram based on sequences of mitochondrial cytochrome-c oxidase I (COI) genes showing phylogenic relations of species within Cochliopidae:
