| Trochonematidae | |
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| Trochonema sp. from the middle Ordovician of the Galena formation of Minnesota | |
| Scientific classification | |
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| Family: | †Trochonematidae |
Trochonematidae is an extinct taxonomic family of fossil sea snails, marine gastropod molluscs in the superfamily Trochonematoidea. [2]
This family has no subfamilies.
The Aplustridae is a taxonomic family of sea snails or bubble snails, marine gastropod mollusks in the superfamily Acteonoidea.
Neritoidea is a taxonomic superfamily of mostly sea snails, nerites and their allies, marine gastropod mollusks in the order Cycloneritida.
Nacellidae is a taxonomic family of sea snails or true limpets, marine gastropod molluscs in the subclass Patellogastropoda.
Polyceroidea is a taxonomic superfamily of sea slugs, specifically dorid nudibranchs, marine gastropod mollusks in the clade Doridacea.
Eucyclidae is a family of gastropods in the superfamily Seguenzioidea.
Sphincterochilidae is a taxonomic family of medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.
Porcellioidea is an extinct superfamily of small to large sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Littorinoidea are a superfamily of both sea snails and land snails which have a gill and an operculum, terrestrial and marine gastropod mollusks in the clade Littorinimorpha.
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.
Olivoidea is a taxonomic superfamily of minute to medium-large predatory sea snails, marine gastropod mollusks in the order Neogastropoda.
Bucaniidae is an extinct family of Paleozoic molluscs of uncertain position possibly being either gastropods or monoplacophorans in the superfamily Bellerophontoidea. The family lived from the Lower Ordovician to the Devonian and have shells in which the apertural margins tend to flare. Most genera have a slit and selenizone, others some modification of this feature.
Sinuitidae is an extinct family of Paleozoic molluscs of uncertain position. They had isostrophically coiled shells.
Cingulopsidae is a family of sea snails, marine gastropod molluscs in the clade Littorinimorpha.
Litiopidae, common name litiopids, is a family of small sea snails, marine gastropod molluscs in the clade Sorbeoconcha.
Omphalocirridae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).
Helicotomidae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).
Sinuopeidae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.
Trochonematoidea is an extinct taxonomic superfamily of fossil sea snails, marine gastropod molluscs.
Rostellariidae is a family of sea snails, marine gastropod molluscs in the clade Littorinimorpha.
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