Austropyrgus dyerianus is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusk or micromollusk in the Hydrobiidae family. This species is endemic to Australia.
The Blue Spring aphaostracon or Blue Spring hydrobe, scientific name Aphaostracon asthenes, is a species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Cochliopidae.
The Wekiwa hydrobe or Wekiwa springs aphaostracon, scientific name Aphaostracon monas, is a species of small freshwater snail, and aquatic gastropod mollusk in the family Cochliopidae.
The Fenney Spring hydrobe. scientific name Aphaostracon xynoelictum, is a species of very small freshwater snails that have an operculum, aquatic operculate gastropod mollusks in the family Hydrobiidae.
The crystal siltsnail, also known as the helicoid spring snail, scientific name Floridobia helicogyra, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
The Ichetucknee siltsnail, also known as the sand grain snail, scientific name Floridobia mica, is a species of small freshwater snail, an aquatic gastropod in the family Hydrobiidae. This species is endemic to Ichetucknee Springs in Florida.
The pygmy siltsnail, scientific name Floridobia parva, is a species of very small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to Blue Spring in Florida.
The ponderous siltsnail or ponderous spring snail, scientific name Floridobia ponderosa, is a species of small freshwater snail, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to Palm Spring in Florida.
The Seminole siltsnail or Seminole spring snail, scientific name Floridobia vanhyningi, is a species of small freshwater snail, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to Seminole Springs in Florida, United States.
The Wekiwa siltsnail or Wekiwa spring snail, scientific name Floridobia wekiwae, is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the Wekiwa Springs State Park in Florida, for which it is named.
Marstonia castor, common name the beaver pond marstonia, is a species of very small freshwater snail with a gill and an operculum, an aquatic operculate gastropod mollusc in the family Hydrobiidae. This species was endemic to a very limited area of the US state of Georgia, mostly to streams and creeks around Lake Blackshear.
The Crystal Spring springsnail, scientific name Pyrgulopsis crystalis, is a species of small freshwater snail, an aquatic gastropod mollusk in the family Hydrobiidae.
The Davis County springsnail, scientific name Pyrgulopsis davisi, is a species of small freshwater snails with a gill and an operculum, aquatic gastropod mollusk in the family Hydrobiidae.
The Gila springsnail, scientific name Pyrgulopsis gilae, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
The fossil springsnail, scientific name Pyrgulopsis simplex, is a species of minute freshwater spring snails, aquatic gastropod mollusks or micromollusks in the family Hydrobiidae. This species is endemic to the United States.
The brown springsnail, scientific name Pyrgulopsis sola, is a species of very small freshwater snail that has a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to Arizona, the United States.
The Diamond Y springsnail, scientific name Tryonia adamantina, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
Marstonia is a genus of freshwater snails with a gill and an operculum, aquatic gastropod molluscs in the family Hydrobiidae.
Floridobia is a genus of very small freshwater snails that have an operculum, in the family Hydrobiidae, the mud snails.
