Tryonia alamosae, common name the Alamosa springsnail, is a species of small freshwater snail, an aquatic prosobranch gastropod mollusk in the family Hydrobiidae.
The fossil record of this family extends back to the Early Carboniferous.
Marstonia ogmorhaphe, common names the royal marstonia or royal springsnail, is a minute species of freshwater snail, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae, the mud snails.
The armored marstonia, scientific name Marstonia pachyta, also known as Pyrgulopsis pachyta, is a species of freshwater snail, an aquatic gastropod mollusk in the family Hydrobiidae.
Littoridinops palustris, a species of very small aquatic snail, an operculate gastropod mollusk in the family Hydrobiidae.
Wekiwa hydrobe is a species of gastropod in the Hydrobiidae family