Lanistes

Lanistes is a genus of freshwater snails which have a gill and an operculum, aquatic gastropod mollusks in the family Ampullariidae, the apple snails.[7]

Lanistes
Lanistes bernardianus (Morelet, 1860)
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
informal group Architaenioglossa
Superfamily:
Ampullarioidea
Family:
Ampullariidae
Subfamily:
Ampullariinae
Tribe:
Ampullariini
Genus:
Lanistes

Montfort, 1810[1]
Type species
Lanistes carinatus (Olivier, 1804).
Diversity[2][3][4]
21 extant species
and at least 10 fossil species
Synonyms
  • Ampullaria (Lanistes)
  • Lanistes (Meladomus) Swainson, 1840
  • Lanistes (Plesiolanistes) Berthold, 1991
  • Lanistes (Prolanistes) Schütt in Schütt & Besenecker, 1973 · accepted, alternate representation
  • Leroya Grandidier, 1887[5]
  • Meladomus Swainson, 1840[6]
  • Meladomus (Bolteniana) Bourguignat, 1889
  • Meladomus (Lanistes)
  • Meladomus (Libyciana) Bourguignat, 1889
  • Meladomus (Meladomus) Swainson, 1840 (formerly used as subgenus of Lanistes)
  • Meladomus (Nyassana) Bourguignat, 1889
  • Meladomus (Olivaceana) Bourguignat, 1889
  • Meladomus (Purpuriana) Bourguignat, 1889

Distribution

The distribution of the genus Lanistes includes Africa and Madagascar.[3]

Description

Lanistes has a unique anatomy among the Ampullariidae: it has a "hyperstrophic" sinistral shell.[8] This means that the body of the snail is dextral (as in all other ampullariids), but the shell appears to be sinistral.[8] However the sinistral appearance stems from the fact that the rotation of the shell as it grows is in an upward direction rather than the usual downward direction.[8]

Species

Three[3] subgenera have been recognized, based on shell differences: Lanistes sensu stricto, Meladomus and Leroya. These subgenera are not used in recent works.[3]

Extant species within the genus Lanistes include:

  • Lanistes alexandri (Bourguignat, 1889)[3]
  • Lanistes ambiguus Martens, 1866
  • Lanistes bernardianus (Morelet, 1860)
  • Lanistes beseneckeri Schütt in Schütt & Besenecker, 1973 †
  • Lanistes bicarinatus Germain, 1907[3]
  • Lanistes bloyeti (Bourguignat, 1889)
  • Lanistes boltenianus (Röding, 1798) - synonym: Lanistes carinatus (Olivier, 1804)[9]
  • Lanistes chaperi (Kobelt, 1912)
  • Lanistes ciliatus Martens, 1878[2][3]
  • Lanistes congicus O. Boettger, 1891[2][3]
  • Lanistes deguerryanus (Bourguignat, 1889)
  • Lanistes ellipticus Martens, 1866[2][3]
  • Lanistes farleri Craven, 1880[2][3]
  • Lanistes fultoni (Kobelt, 1912)
  • Lanistes grasseti (Morelet, 1863)[3]
  • Lanistes graueri Thiele, 1911[2][3]
  • Lanistes intortus Martens, 1877[2][3]
  • Lanistes jouberti (Bourguignat, 1888)
  • Lanistes letourneuxi (Bourguignat, 1879)
  • Lanistes libycus (Morelet, 1848)[2][3]
    • Lanistes libycus var. albersi
    • Lanistes libycus form bernardianus[3] or as Lanistes bernardianus (Morelet, 1860)[2]
  • Lanistes magnus Furtado, 1886
  • Lanistes nasutus Mandahl-Barth, 1972[2][3]
  • Lanistes neavei Melvill & Standen, 1907[2][3]
  • Lanistes neritoides Brown & Berthold, 1990[2][3]
  • Lanistes nitidissimus (Bourguignat, 1889)
  • Lanistes nsendweensis (Dupuis & Putzeys, 1901)[3]
  • Lanistes nyassanus Dohrn, 1865[3]
  • Lanistes ovatus (Olivier, 1804)
  • Lanistes ovum Peters in Troschel, 1845[3] - synonyms: Lanistes magnus Furtado; Lanistes olivaceus (Sowerby); Lanistes procerus; Lanistes elatior Martens, 1866; Lanistes ovum bangweolicus Haas, 1936; Lanistes connollyi Pain, 1954[3] Lanistes ovum adansoni; Lanistes olivaceus var. ambiguus
  • Lanistes palustris (Morelet, 1864)
  • Lanistes pfeifferi (Bourguignat, 1879)
  • Lanistes pilsbryi Walker, 1925
  • Lanistes pseudoceratodes (Wenz, 1928)[2]
  • Lanistes purpureus (Jonas, 1839)[2][3]
  • Lanistes solidus Smith, 1877[2][3]
  • Lanistes stuhlmanni Martens, 1897[2][3]
  • Lanistes varicus (Müller, 1774) - synonyms: Lanistes adansoni Kobelt, 1911; Lanistes millestriatus Pilsbry & Bequaert, 1927[3]

Fossil species within the genus Lanistes include:

  • † Lanistes asellus van Damme & Pickford, 1995[4]
  • † Lanistes bishopi Gautier[4]
  • † Lanistes gautieri van Damme & Pickford, 1995[4]
  • † Lanistes gigas van Damme & Pickford, 1995[4]
  • † Lanistes hadotoi van Damme & Pickford, 1995[4]
  • † Lanistes heynderycxi van Damme & Pickford, 1995[4]
  • † Lanistes nkondoensis van Damme & Pickford, 1995[4]
  • † Lanistes olukaensis[4]
  • † Lanistes senuti van Damme & Pickford, 1995[4]
  • † Lanistes trochiformis van Damme & Pickford, 1995[4]
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References
  1. Montfort P. D. de (1810). Conch. Syst. 2: 122.
  2. "Lanistes". The apple snail website, accessed 16 May 2011.
  3. Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN 0-7484-0026-5.
  4. van Damme D. & Pickford M. (1995). "The late Cenozoic ampullariidae (mollusca, gastropoda) of the Albertine Rift Valley (Uganda-Zaire)". Hydrobiologia 316(1): 1-32. doi:10.1007/BF00019372.
  5. Grandidier (1887). Bull. Soc. malac. France 4: 191.
  6. Swainson (1840). Treat. Malacol., page 340.
  7. Bouchet, P.; Neubauer, Thomas A. (2015). Lanistes Montfort, 1810. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=820447 on 2015-11-11
  8. "Shell". The apple snail website, accessed 16 May 2011.
  9. Bouchet, P. (2016). Lanistes boltenianus (Röding, 1798). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=843296 on 2017-06-06
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