Neritoidea is a taxonomic superfamily of mostly sea snails, nerites and their allies, marine gastropod mollusks in the order Cycloneritida.
Buccinoidea is a taxonomic superfamily of very small to large predatory sea snails, marine gastropod mollusks.
The Ranellidae, common name the triton shells or tritons, are a taxonomic family of small to very large predatory sea snails, marine gastropod mollusks in the order Littorinimorpha.
Chilodontaidae is a taxonomic family of mostly small deepwater sea snails, marine gastropod molluscs in the clade Vetigastropoda.
The Capulidae, the cap snails or cap shells, are a taxonomic family of limpet-like sea snails, marine gastropod molluscs in the clade Littorinimorpha. Capulidae is the only family in the superfamily Capuloidea. According to taxonomy of the Gastropoda by Bouchet & Rocroi (2005) the family Capulidae has no subfamilies.
Cancellariidae, common name the nutmeg snails or nutmeg shells, are a family of small to medium-large sea snails, marine gastropod mollusks in the clade Neogastropoda. Some of the shells of the species in this family resemble a nutmeg seed.
Lepetelloidea is a superfamily of sea snails, small deepwater limpets, marine gastropod mollusks in the clade Vetigastropoda.
Eatoniellidae, commonly known as eatoniellids, are a taxonomic family of minute sea snails, marine gastropod molluscs in the superfamily Cingulopsoidea.
Lottiidae is a family of sea snails, specifically true limpets, marine gastropod mollusks in the superfamily Lottioidea and the clade Patellogastropoda.
Pendromidae is a family of gastropods in the clade Vetigastropoda.
Seguenziidae is a family of very small deepwater sea snails, marine gastropod mollusks in the superfamily Seguenzioidea.
Solariellidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea.
Eucyclidae is a family of gastropods in the superfamily Seguenzioidea.
Provannidae is a family of deep water sea snails, marine gastropod mollusks in the superfmaily Abyssochrysoidea.
Phenacolepadidae is a family of small sea snails or false limpets, marine gastropod mollusks in the clade Cycloneritimorpha.
Cylichnidae, common name the "chalice bubble snails" or "canoe bubble snails" is a family of sea snails or bubble snails, marine gastropod mollusks in the superfamily Cylichnoidea.
Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Pseudolividae is a taxonomic family of medium-sized sea snails, marine gastropod mollusks in the superfamily Pseudolivoidea.
Margaritidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea.
Cocculinida is an order of deepwater limpets, in the subclass Neomphaliones.
