Omalogyridae are a family of minute and microscopic sea snails, marine gastropod molluscs or micromolluscs in the informal group Lower Heterobranchia. Adult shells are usually smaller than 1 millimeter.
Chrysallida is a speciose genus of minute sea snails, pyramidellid gastropod mollusks or micromollusks in the family Pyramidellidae within the tribe Chrysallidini.
Notosetia is a genus of minute sea snails or micromolluscs, marine gastropod molluscs in the family Turbinidae.
Liotella is a genus of minute sea snails or micromolluscs, marine gastropod molluscs in the family Skeneidae.
Palazzia is a genus of sea snails, marine gastropod mollusks, unassigned in the superfamily Seguenzioidea.
Skenea is a genus of small to minute sea snails, marine gastropod mollusks in the family Skeneidae.
Minolia is a genus of sea snails, marine gastropod mollusks in the family Solariellidae.
Alvania is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Crisilla is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Rissoina is a large genus of minute sea snails, marine gastropod mollusks or micromollusks, in the family Rissoinidae.
Setia is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Seila is a genus of minute sea snails, marine gastropod molluscs or micromolluscs in the family Cerithiopsidae.
Circulus is a genus of very small and minute sea snails with an operculum, marine gastropod mollusks in the family Vitrinellidae.
Taranis is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
The Skeneidae are a speciose family of minute to small marine gastropod molluscs in the superfamily Trochoidea.
Eulimella is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.
Turbonilla is a large genus of ectoparasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.
Ammonicera is a genus of minute sea snails, marine gastropod molluscs or micromollusks in the family Omalogyridae.
