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.
Architectonicidae, common name the staircase shells or sundials, are a family of sea snails, marine gastropod mollusks in the informal group "Lower Heterobranchia" of the clade Heterobranchia.
Mathildidae is a family of small sea snails, marine gastropod molluscs in the superfamily Mathildoidea of the informal group of the Lower Heterobranchia.
Omalogyra is a genus of minute marine gastropod molluscs in the family Omalogyridae.
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.
Murchisonellidae is a taxonomic family of sea snails, marine opisthobranch gastropod mollusks in the superfamily Murchisonelloidea.
The Hyalogyrinidae is a taxonomic family of sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia.
The Cimidae is a taxonomic family of sea snails, marine gastropod mollusks in the infraclass Lower Heterobranchia.
Skenea is a genus of small to minute sea snails, marine gastropod mollusks in the family Skeneidae.
Ammonicera is a genus of minute sea snails, marine gastropod molluscs or micromollusks in the family Omalogyridae.
Ammonicera minortalis is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera japonica is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera mcleani is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera mexicana is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera sleursi is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera sucina is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera lignea is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera plana is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera san is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Ammonicera rota is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
