Chitons are marine molluscs of varying size in the class Polyplacophora, formerly known as Amphineura. About 940 extant and 430 fossil species are recognized.
Turbinidae, the turban snails, are a family of small to large marine gastropod molluscs in the superfamily Trochoidea.
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large operculate freshwater snails, aquatic gastropod mollusks.
Neritidae, common name the nerites, is a taxonomic family of small to medium-sized saltwater and freshwater snails which have a gill and a distinctive operculum.
Chiton is a genus of chitons, a polyplacophoran mollusk in the family Chitonidae.
Turritellidae, with the common name "tower shells" or "tower snails", is a taxonomic family of small- to medium-sized sea snails, marine gastropod molluscs in the Sorbeoconcha clade.
Ischnochiton is a genus of polyplacophoran mollusc.
Plaxiphora is a genus of chitons in the family Mopaliidae. It is distributed in the Atlantic, Indian, and Pacific Oceans, primarily in the south-temperate and subantarctic regions.
Onithochiton is a genus of chitons in the subfamily Toniciinae of the family Chitonidae, which is distributed from Australia and New Zealand to South Africa.
Naticidae, common name moon snails or necklace shells, is a family of medium to large-sized predatory sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of the species in this family are mostly globular in shape.
Lottiidae is a family of sea snails, specifically true limpets, marine gastropod mollusks in the superfamily Lottioidea and the clade Patellogastropoda.
Cylichnidae, common name the "chalice bubble snails" or "canoe bubble snails" is a family of sea snails or bubble snails, marine gastropod mollusks in the superfamily Cylichnoidea.
Clavatulidae is a taxonomic family of sea snails, marine gastropod mollusks in the superfamily Conoidea. The family is not well differentiated morphologically.
Rissoella is a genus of minute sea snails, marine gastropods, in the family Rissoellidae.
Ischnochitonidae is a family of polyplacophoran mollusc belonging to the superfamily Chitonoidea.
Mopaliidae is a family of marine molluscs in the class Polyplacophora.
Tonicia is a genus of chitons in the subfamily Toniciinae of the family Chitonidae.
Stenosemus is a genus of polyplacophoran molluscs in the family Ischnochitonidae.
Thermochiton is a genus of polyplacophoran molluscs in the family Ischnochitonidae.
Enoplochiton is a genus of chitons in the family Chitonidae.
