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Monoplacophora, meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell now living at the bottom of the deep sea. Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were previously thought to have become extinct over 380 million years ago.
Buccinoidea is a taxonomic superfamily of very small to large predatory sea snails, marine gastropod mollusks.
Trochoidea is a superfamily of small to very large vetigastropod sea snails with gills and an operculum. Species within this superfamily have nacre as the inner shell layer. The families within this superfamily include the Trochidae, the top snails. This superfamily is the largest vetigastropodan superfamily, containing more than 2,000 species.
Cycloneritida is a order of land snails, freshwater snails, and sea snails.
The limacoidei is a taxonomic infraorder of air-breathing land snails, semislugs and slugs, terrestrial pulmonate gastropod molluscs in the suborder Helicina
Scissurelloidea is a taxonomic superfamily of minute sea snails, marine gastropod mollusks or micromollusks in the clade Vetigastropoda.
Viviparoidea is a taxonomic superfamily of freshwater snails, aquatic gastropod mollusks within the informal group Architaenioglossa, which belongs to the clade Caenogastropoda.
The Cingulopsoidea is a superfamily of sea snails, marine gastropod molluscs in the clade Littorinimorpha.
Lottioidea is a superfamily of sea snails or limpets, marine gastropod mollusks in the clade Patellogastropoda, the true limpets.
Neolepetopsoidea is the name of a taxonomic superfamily which is now considered to be a synonym of Lottioidea. Previously Neolepetopsoidea was considered to be a family of sea snails, marine gastropod mollusks within the clade Patellogastropoda.
Ladamarekiidae is an extinct family of Paleozoic fossil molluscs of uncertain position. it is not known if they are sea snails.
Patelliconidae is an extinct family of Paleozoic fossil molluscs. It is not known whether these were Gastropoda or Monoplacophora.
†Archinacellidae is an extinct family of paleozoic molluscs of uncertain position.
†Archaeopragidae is an extinct family of paleozoic molluscs of uncertain position.
Pelagiellidae is an extinct family of Paleozoic fossil marine molluscs.
Tremanotidae is an extinct family of Paleozoic fossil molluscs with isostrophically coiled shells. They occupy an uncertain position taxonomically: it is not known whether they were (gastropods or monoplacophorans.
Isospiridae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.
Palaeozygopleuridae is an extinct taxonomic family of fossil sea snails, marine gastropod molluscs.
Lophospiridae is an extinct taxonomic family of sea snails, marine gastropod molluscs.
Euomphaloidea, originally Euomphalacea, is an extinct superfamily of marine molluscs that lived from the Early Ordovician to the Late Cretaceous, included in the Gastropoda but speculated as instead perhaps Monoplacophora.
References
- ↑ Bouchet, P.; Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).
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