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Liotiidae is a family of small sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Eucyclidae is a family of gastropods in the superfamily Seguenzioidea.
Bellerophontoidea, common name "bellerophonts", is a superfamily of extinct planospirally-coiled globose molluscs. This superfamily is generally included within the Gastropoda, but may instead be a group of monoplacophorans. The taxon first appeared late in the Cambrian and continued until late in the Triassic.
Euomphalidae is an extinct family of Paleozoic to early Mesozoic marine molluscs which may be gastropods with anisostrophically coiled shells . The shells show a selenizone.
Porcellioidea is an extinct superfamily of small to large sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.
†Archinacellidae is an extinct family of paleozoic molluscs of uncertain position.
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.
Sinuitidae is an extinct family of Paleozoic molluscs of uncertain position. They had isostrophically coiled shells.
Ptychatractidae is a taxonomic family of sea snails, marine gastropod mollusks in the superfamily Turbinelloidea.
Macluritidae is an extinct family of relatively large, Lower Ordovician to Devonian, macluritacean gastropods(?), hypserstrophically coiled, that is dextral while appearing sinsitral, of which the genus Maclurites is arch-typical. The base of their shells is flat or gently protruding while the upper side is generally concave.
Helicotomidae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).
Lesueurillidae is an extinct family of paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).
†Holopeidae is an extinct family of paleozoic gastropod mollusks. These molluscs were stationary epifaunal suspension feeders.
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.
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.
Pilina is an extinct genus of paleozoic monoplacophorans in the family Tryblidiidae.
This overview lists proposed changes in the taxonomy of gastropods at the family level and above since 2005, when the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) was published. In other words, these are recent updates in the way various groups of snails and slugs are classified.
References
- ↑ Wangberg-Eriksson K. (1964). "Isospira reticulata n. sp. from the Upper Ordovician Boda Limestone, Sweden". Geologiska Föreningen i Stockholm Förhandlingar86(3): 229-237.
- 1 2 Bouchet, P.; Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).
- ↑ "Isospira". The Paleobiology Database, accessed 26 February 2010.
- ↑ Wagner P. J. (2008). "Paleozoic Gastropod, Monoplacophoran and Rostroconch Database". [ permanent dead link ]
- 1 2 3 "Cyrtonellidae" The Paleobiology Database. Accessed 26 February 2010.