Pachychilidae
Pachychilidae, common name pachychilids, is a taxonomic family of freshwater snails, gastropod molluscs in the clade Sorbeoconcha.Distribution
Pachychilids are freshwater snails with a worldwide distribution in the tropics. Representatives are found in South and Central America, Africa, Madagascar, South and South-east Asia and tropical Australia.Description
Pachychilids have an operculum, which is concentric and multispiral.Ecology
All species in the family inhabit freshwater except Faunus ater, which is a brackish water snail found in estuaries and other coastal habitats. Pachychilids are either oviparous, ovoviviparous or viviparous.Genera
Genera within the family Pachychilidae include:
- † Bellatara Strand, 1928 - with only one species Bellatara janus
- Brotia H. Adams, 1866
- Doryssa Swainson, 1840
- † Eginea Pacaud & Harzhauser, 2012
- Faunus de Montfort, 1810 with the only species Faunus ater
- Jagora Köhler & Glaubrecht, 2003
- † Jponsia Pacaud & Harzhauser, 2012
- Madagasikara Köhler & Glaubrecht, 2010 - synonym: Melanatria Bowdich, 1822 auctt.
- † Nodifaunus Olsson, 1944
- Pachychilus I. Lea & H. C. Lea, 1851 - type genus of the family Pachychilidae
- Paracrostoma Cossmann, 1900
- Potadoma Swainson, 1840
- † Pseudobellardia Cox, 1931
- Pseudopotamis Martens, 1894
- Sulcospira Troschel, 1858 - synonym: Adamietta Brandt, 1974
- † Tinnyea Hantken, 1887
- Tylomelania Sarasin & Sarasin, 1897
- † Wingeastonia K. Martin, 1906
;Genera brought into synonymy:
- Acrostoma Brot, 1871: synonym of Paracrostoma Cossmann, 1900
- Antimelania P. Fischer & Crosse, 1892: synonym of Brotia H. Adams, 1866
- Brotella Rovereto, 1899: synonym of Paracrostoma Cossmann, 1900
- Fauninae Cossmann, 1909 : synonym of Pachychilidae P. Fischer & Crosse, 1892
- Melanatria Bowdich, 1822: synonym of Faunus Montfort, 1810
- Oxymelania Crosse & P. Fischer, 1892: synonym of Pachychilus I. Lea & H. C. Lea, 1851
- Pirena Lamarck, 1822: synonym of Faunus Montfort, 1810
- Sphaeromelania Rovereto, 1899: synonym of Pachychilus I. Lea & H. C. Lea, 1851
- Wanga Chen, 1943: synonym of Brotia H. Adams, 1866
Cladogram
A cladogram based on sequences of mitochondrial 16S ribosomal RNA sequences showing phylogenic relations of Pachychilidae:
