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Eucyclidae is a family of gastropods in the superfamily Seguenzioidea.
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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.
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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.
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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.