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Lanistes
Genus of gastropods From Wikipedia, the free encyclopedia
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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]
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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
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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 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;[citation needed] Lanistes olivaceus var. ambiguus[citation needed]
- 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
External links
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