Tryonia is a genus of freshwater snails in the family Hydrobiidae. This genus is sometimes placed in the family Cochliopidae.
Snails of this genus are very small with narrow shells. Females brood young within the genital tract. Species usually live in springs. The genus is differentiated from others by the structure of the male and female reproductive systems.
Most of these snails occur in western North America, especially the Chihuahuan Desert. There are also species known in Florida and Guatemala.
Species
Species include:
References
External links
- Myers, P., et al. 2014. Tryonia. The Animal Diversity Web.
- Hershler, R. (1999). A systematic review of the hydrobiid snails (Gastropoda: Rissoidea) of the Great Basin, western United States. Part II. Genera Colligyrus, Fluminicola, Pristinicola, and Tryonia". The Veliger 42(4) 306-37.
- Hershler, R. & F. G. Thompson. (1987). North American Hydrobiidae (Gastropoda: Rissoacea): redescription and the systematic relationships of Tryonia Stimpson, 1865 and Pyrgulopsis Call and Pilsbry, 1886. The Nautilus 101(1) 25-32.
- Stimpson, W. (1865). Researches upon the Hydrobiinae and allied forms chiefly made upon materials in the museum of the Smithsonian Institution. Smithsonian Miscellaneous Collections 7 (201): 1-59. page 48.
- Thompson F.G. (2011) An annotated checklist and bibliography of the land and freshwater snails of México and central America. Florida Museum of Natural History, Bulletin 50(1): 1-299.