Pachychilidae Temporal range: Paleogene - recent | |
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Two shells of Pachychilus laevisimus | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Clade: | Caenogastropoda |
Clade: | Sorbeoconcha |
Superfamily: | Cerithioidea |
Family: | Pachychilidae P. Fischer & Crosse, 1892 [1] |
Type genus | |
Pachychilus I. Lea & H. C. Lea, 1851 | |
Diversity [2] [3] | |
191-226 extant species | |
Synonyms | |
Pachychilidae, common name pachychilids, is a taxonomic family of freshwater snails, gastropod molluscs in the clade Sorbeoconcha. [8]
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 (Queensland: Torres Strait Islands).
Pachychilids have an operculum, which is concentric and multispiral.
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 (lay eggs), ovoviviparous or viviparous (retain developing eggs and youngs in special incubatory structures).
The name is derived from a combination of the words 'pachy' (Greek = thick) and the suffix '-chilus' (Greek = Lip), meaning 'thick lipped' - with respect to the thickened aperture of the shell in some species. Most 20th-century authors did not recognize Pachychilidae as an independent family, but affiliated species under different groups, such as Thiaridae and Pleuroceridae. However, recent revisions based on molecular and morphological evidence have proven their independent and distinct status from the former. This family has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). [9]
Genera within the family Pachychilidae include:
A cladogram based on sequences of mitochondrial 16S ribosomal RNA sequences showing phylogenic relations of Pachychilidae: [12]
Pachychilidae |
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Madagasikara is a genus of tropical freshwater snails with an operculum, aquatic gastropod molluscs in the family Pachychilidae.
Pleuroceridae, common name pleurocerids, is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell.
Thiaridae, common name thiarids or trumpet snails, is a family of tropical freshwater snails with an operculum, aquatic gastropod mollusks in the superfamily Cerithioidea.
The Cerithioidea is a superfamily of marine, brackish water and freshwater gastropod containing more than 200 genera. The Cerithoidea are included in the clade Sorbeoconcha. The original name of this superfamily was Cerithiacea, in keeping with common superfamily endings at the time.
Brotia is a genus of Southeast Asian freshwater snails, gastropod molluscs in the taxonomic family Pachychilidae.
Brotia citrina is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Brotia sumatrensis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Brotia verbecki is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Jagora asperata is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae. Jagora asperata is the type species of the genus Jagora.
Jagora is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae.
Sulcospira is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae.
Tylomelania is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae. In the aquarium hobby, snails from this genus are commonly known as "rabbit snails".
Tylomelania neritiformis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania kruimeli is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania zeamais is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania perfecta is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania celebicola is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania wallacei is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Tylomelania mahalonensis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Doryssa consolidata is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.