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