Tryonia is a genus of freshwater snails in the family Hydrobiidae. This genus is sometimes placed in the family Cochliopidae
Wendell Lee Minckley was a college professor and leading expert on fish. He spent most of his career at Arizona State University.
Cincinnatia is a genus of very small freshwater snails that have an operculum, aquatic gastropod molluscs in the family Hydrobiidae, the mud snails.
The phantom cave snail or phantom cavesnail is a species of very small freshwater snail with an operculum, an aquatic gastropod in the family Hydrobiidae.
Cochliopa is a genus of freshwater snails, specifically cave snails, aquatic gastropod mollusks in the family Cochliopidae.
Fluminicola is a genus of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae.
Pyrgulopsis is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.
The Jackson lake springsnail, scientific name Pyrgulopsis robusta, is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. The shell is 4.6 to 7.5 millimetres high and 1.48 to 2.10 millimetres wide, which is large for this genus. It has 4.5 to 6.25 whorls, and is clear-white with a tan periostracum.
Brune's tryonia, scientific name Tryonia brunei, is a species of very small freshwater snail that has a gill and an operculum, an aquatic gastropod mollusks in the family Hydrobiidae. This species is endemic to the United States (Texas). It was formerly listed as Threatened in 1993/1994 and Data Deficient since 1996 until it was changed to Critically Endangered and possibly extinct in 2012; this is because it is found only in Phantom Lake, Balmorhea Lake, has range of less than 100 km², and was last observed in 1993. A 1991 report by the United States Fish and Wildlife Service also listed it as Endangered and they also later noted the unknown population. It is found in firm substratum and on mud before modification.
Amnicolidae is a family of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea.
Cochliopidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks.
The Socorro springsnail, scientific name Pyrgulopsis neomexicana, is an endangered species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae, the mud snails.
Marstonia is a genus of freshwater snails with a gill and an operculum, aquatic gastropod molluscs in the family Hydrobiidae.
Marstonia comalensis is a species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae. It is found in south central Texas, United States.
Floridobia is a genus of very small freshwater snails that have an operculum, in the family Hydrobiidae, the mud snails.
Eremopyprgus is a genus of very small freshwater snails, aquatic gastropod mollusks in the family Cochliopidae.
Chorrobius is a genus of very small freshwater snails, aquatic gastropod mollusks in the family Cochliopidae.
Pseudotryonia is a genus of gastropods belonging to the family Cochliopidae.
