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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.
Bellerophon is a genus of extinct paleozoic marine molluscs of uncertain position in the family Bellerophontidae.
Potamididae, common name potamidids are a family of small to large brackish water snails that live on mud flats, mangroves and similar habitats. They are amphibious gastropod molluscs in the superfamily Cerithioidea.
Turritellidae, common name the "tower shells" or "tower snails", is a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Sorbeoconcha.
† Bembexia is a genus of fossil sea snails, marine gastropod mollusks. This genus is placed in the subfamily Eotomariinae, of the family Eotomariidae. The shell characters resemble those of Balbinipleura. These snails have been interpreted as herbivorous, probably grazing on algae.
Cirridae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Porcellioidea.
Neritopsidae is a family of small sea snails and freshwater snails in the clade Cycloneritimorpha.
Murchisonioidea is an extinct superfamily of small to large sea snails, marine gastropod mollusks in the clade Vetigastropoda.
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.
Scoliostomatidae is an extinct family of Paleozoic fossil sea snails, marine gastropod mollusks.
Lophospiridae is an extinct taxonomic family of sea snails, marine gastropod molluscs.
Craspedostomatidae is an extinct taxonomic family of fossil sea snails, marine, gastropod mollusks in the clade Neritimorpha.
†Orthonychiidae is an extinct taxonomic family of fossil sea snails, marine, gastropod mollusks in the clade Cyrtoneritimorpha.
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.
Tubospirina is an extinct genus of fossil sea snails, marine gastropod mollusks in the family Craspedostomatidae. These snails were parasitic-carnivores. They lived in the Silurian Period, Pridoli Age.
References
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Frýda J., Ferrová L., Berkyová S. & Frýdová B. (2008). "A new Early Devonian palaeozygopleurid gastropod from the Prague Basin (Bohemia) with notes on the phylogeny of the Loxonematoidea". Bulletin of Geosciences 83(1): 93-100 (1 figure). doi : 10.3140/bull.geosci.2008.01.093.
- ↑ Bouchet, P. & Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).
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