Hydrobiidae, commonly known as mud snails, is a large cosmopolitan family of very small freshwater and brackish water snails with an operculum; they are in the order Littorinimorpha.
Alzoniella is a genus of minute freshwater spring snails, aquatic gastropod mollusks or micromollusks in the family Hydrobiidae.
Moitessieria simoniana is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusc or micromollusc in the family Moitessieriidae. This species is found in France and Spain.
Platyla is a genus of very small land snails with an operculum, terrestrial gastropod molluscs or micromolluscs in the family Aciculidae.
Mercuria similis is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
Moitessieriidae is a family of small freshwater snails, aquatic gastropod molluscs in the superfamily Truncatelloidea.
Islamia is a genus of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.
Tudorella is a genus of land snails, terrestrial gastropod mollusks in the family Pomatiidae.
Euthria marianae is a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks.
Euthria is a genus of sea snails, marine gastropod mollusks in the whelk family Tudiclidae.
Alzoniella marianae is a species of very small aquatic snail, a spring snail, an operculate gastropod mollusc in the family Hydrobiidae.
Sardopaladilhia buccina is a species of very small aquatic snail, an operculate gastropod mollusc in the family Moitessieriidae.
Sardopaladilhia distorta is a species of very small aquatic snail, an operculate gastropod mollusc in the family Moitessieriidae.
Sardopaladilhia marianae is a species of very small aquatic snail, an operculate gastropod mollusc in the family Moitessieriidae.
Sardopaladilhia subdistorta is a species of very small aquatic snail, an operculate gastropod mollusc in the family Moitessieriidae.
Canariellidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.
Sadleriana fluminensis is a land snail from the family Hydrobiidae.
Azecidae is a family of small and very small air-breathing land snails, terrestrial gastropod mollusks in the superfamily Azecoidea.
