Cochliopidae Explained

Cochliopidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks.

Paludestrina d'Orbigny, 1840 is an archaic synonym,^[1] and has been placed on the Official Index of Rejected and Invalid Names by ICZN Opinion 2202.^[2]

This family is in the superfamily Truncatelloidea and in the order Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

Description

Cochliopidae snails are characterized by sharp, elongated spire-like structures, and can be found in rivers or brackish water.

2005 taxonomy

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, 1966
• Littoridininae Thiele, 1928
• Semisalsinae Guiusti & Pezzoli, 1980 - synonym: Heleobiini Bernasconi, 1991

Genera

Liu et al. (2001) have recognized 34 genera with more than 260 species within the subfamily Cochliopinae.

Strong et al. (2008)^[3] have recognized 246 freshwater species within Cochliopidae.^[3]

Genera within the family Cochliopidae include:

subfamily Cochliopinae

• Aphaostracon F. G. Thompson, 1968
• Coahuilix Taylor, 1966
• Cochliopa Stimpson, 1865 - type genus of the family Cochliopidae
• Cochliopina Morrison, 1946

subfamily Littoridininae

• Antrobia Hubricht, 1971 - with the only species Antrobia culveri Hubricht, 1971^[4] - Tumbling Creek cavesnail
• Littoridina Souleyet, 1852
• Pseudocaspia Starobogatov, 1972
• Pseudotryonia Hershler, 2001
  • Pseudotryonia adamantina
  • Pseudotryonia alamosae
  • Pseudotryonia brevissima
  • Pseudotryonia grahamae
  • Pseudotryonia mica Hershler, Liu & Landye, 2011^[5]
  • Pseudotryonia pasajae Hershler, Liu & Landye, 2011^[5]

subfamily Semisalsinae - there are three genera in the subfamily Semisalsinae^[6]

• Heleobia Stimpson, 1865^[6]
• Heleobops Thompson, 1968^[6]
• Semisalsa Radoman, 1974^[6]

subfamily ? (either Cochliopinae or Littoridininae)

• Aroapyrgus H. B. Baker, 1931
• Balconorbis Hershler & Longley, 1986
• † Carinulorbis Yen, 1949
• Chorrobius Hershler, Liu & Landye, 2011^[5]
• Dyris Conrad, 1871 - it has extant species and also 26 species in Miocene Pebas Formation
• Emmericiella Pilsbry, 1909
• Eremopyprgus Hershler, 1999^{[7] [8]}
• † Feliconcha Wesselingh, Anderson & Kadolsky, 2006 - two species from Miocene of the Pebas Formation^[9]
  • Feliconcha feliconcha Wesselingh, Anderson & Kadolsky, 2006^[9]
  • Feliconcha reticulata Wesselingh, Anderson & Kadolsky, 2006^[9]
• (probably extant)^[9] Glabertryonia Wesselingh, Anderson & Kadolsky, 2006 - three species^[9]
  • † Glabertryonia glabra Wesselingh, Anderson & Kadolsky, 2006 - from Miocene of the Pebas Formation^[9]
  • † Glabertryonia sp. 1 - from Pliocene of the Las Piedras Formation^[9]
  • (probably extant) Glabertryonia sp. 2 - from Holocene of Surinam, probably extant^[9]
• Juturnia Hershler, Liu & Stockwell, 2002
• Lithococcus Pilsbry, 1911
• Mesobia F. G. Thompson & Hershler, 1991
• Mexipyrgus Taylor, 1966
• Minckleyella Hershler, Liu & Landye, 2011^[5] - with the only species Minckleyella balnearis Hershler, Liu & Landye, 2011^[5]
• Onobops Thompson, 1968^[9]
• Pyrgophorus Ancey, 1888^[9]
• Sioliella Haas, 1949
• Spurwinkia Davis, Mazurkiewicz & Mandracchia, 1982
• Texadina Abbott & Ladd, 1951
• Thalassobia Bourguignat in Mabille, 1877

Cladogram

A cladogram based on sequences of mitochondrial cytochrome-c oxidase I (COI) genes showing phylogenic relations of species within Cochliopidae:^[10]

Further reading

• Hershler R., Davis C. L., Kitting C. L & Liu H.-P. (2007). "Discovery of introduced and cryptogenic cochliopid gastropods in the San Francisco Estuary, California". Journal of Molluscan Studies 73(4): 323-332. PDF.
• Hershler R. & Thompson F. G. (1992). "A Review of the Aquatic Gastropod Subfamily Cochliopinae (Prosobranchia: Hydrobiidae)". Malacological Review, Supplement 5: 1-140. pages 16–18.
• Wilke T., Haase M., Hershler R., Liu H.-P., Misof B. & Ponder W. (2013) Pushing short DNA fragments to the limit: Phylogenetic relationships of ‘hydrobioid’ gastropods (Caenogastropoda: Rissooidea). Molecular Phylogenetics and Evolution, 66: 715-736

External links

• Cochliopidae on WoRMS

Notes and References

1. Book: Bourguignat, Jules René. Iconographie malacologique des animaux mollusques fluviatiles du Lac Tanganika. Impr. Crété. 1888-01-01. fr.
2. MolluscaBase eds. (2021). MolluscaBase. Cochliopidae Tryon, 1866. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=411706 on 2021-05-13
3. Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". Hydrobiologia 595: 149-166. .
4. Kabat A. R. & Hershler R. (1993). "The prosobranch snail family Hydrobiidae (Gastropoda: Rissooidea): review of classification and supraspecific taxa". Smithsonian Contributions to Zoology 547: 1-94. PDF.
5. Hershler R., Liu H.-P. & Landye J. J. (2011). "Two new genera and four new species of freshwater cochliopid gastropods (Rissooidea) from northeastern Mexico". Journal of Molluscan Studies 77(1): 8-23. .
6. Kroll O., Hershler R., Albrecht C., Terrazas E. M., Apaza R., Fuentealba C., Wolff C. & Wilke T. (2012). "The endemic gastropod fauna of Lake Titicaca: correlation between molecular evolution and hydrographic history". Ecology and Evolution 2(7): 1517-1530. .
7. Hershler R., Liu H.-P. & Landye J. J. (2002). "A new species of Eremopyprgus (Hydrobiidae: Cochliopinae) from the Chihuahuan desert, Mexico: Phylogentic relationships and biogeography". Journal of Molluscan Studies 68: 7-13. PDF.
8. Hershler R. (1999). "A systematic review of the hydrobiid snails (Gastropoda: Rissoidea) of the Great Basin, western United States. Part II. Genera Colligyrus, Fluminicola, Pristinicola, and Tryonia". The Veliger 42(4): 306-337. PDF .
9. Wesselingh F. P., Anderson L. C. & Kadolsky D. (2006). "Molluscs from the Miocene Pebas Formation of Peruvian and Colombian Amazonia". Scripta Geologica 1333: 19-290. PDF.
10. Liu H.-P., Hershler R. & Thompson F. G. (2001). "Phylogenetic Relationships of the Cochliopinae (Rissooidea: Hydrobiidae): An Enigmatic Group of Aquatic Gastropods". Molecular Phylogenetics and Evolution 21(1): 17-25. .