Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs. The great majority of species of pyrams are micromolluscs.
Turbonillinae is a subfamily of mostly minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.
Cerithiopsidae is a family of very small sea snails in the informal group Ptenoglossa. Members of this family are known as cerithiopsids.
Cirsonella is a genus of small sea snails, marine gastropod molluscs in the family Skeneidae.
Newtoniellidae is a family of minute sea snails, marine gastropod mollusks or micromollusks in the superfamily Triphoroidea. It contains the following subfamilies :
Lioglyphostoma is a genus of sea snails, marine gastropod mollusks in the family Pseudomelatomidae.
Leptothyra is a genus of sea snails, marine gastropod mollusks in the family Colloniidae.
Melanella is a genus of very small ectoparasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Seila is a genus of minute sea snails, marine gastropod molluscs or micromolluscs in the family Cerithiopsidae.
Opalia is a genus of small sea snails, marine gastropod mollusks in the family Epitoniidae, commonly known as wentletraps.
Rissoella is a genus of minute sea snails, marine gastropods, in the family Rissoellidae.
Cerithiopsis is a genus of very small sea snails, marine gastropod mollusks or micromollusks in the family Cerithiopsidae.
Niso is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Cerithiella is a genus of minute sea snails, marine gastropod molluscs in the family Newtoniellidae.
Horaiclavidae is a family of predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.
Cerithiopsidella is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae. It was described by Paul Bartsch in 1911.
Aclis is a genus of small sea snails, marine gastropod mollusks in the family Eulimidae.
Nisiturris is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.
Oparopsis is a genus of very small sea snails, marine gastropod molluscs in the family Cerithiopsidae.
