| Physella | |
|---|---|
| |
| A live individual of Physella acuta | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superorder: | Hygrophila |
| Family: | Physidae |
| Tribe: | Physellini |
| Genus: | Physella Haldeman, 18421 |
Physella is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae.
These snails eat algae, diatoms and other detritus.
Shell description
Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side.
The shells of Physella species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent.
Species
Species in the genus include:
- Physella acuta (Draparnaud, 1805) - Pewter Physa,2 type species, synonyms: Physella heterostropha (Say, 1817), Physella integra (Haldeman, 1841)3
- Physella ancillaria (Say, 1825)
- Physella bermudezi (Aguayo, 1935) - Lowdome Physa2
- Physella bottimeri (Clench, 1924) - Comanche Physa2
- Physella boucardi (Crosse & P. Fischer, 1881) - Desert Physa2
- Physella columbiana (Hemphill, 1890) - Rotund Physa2
- Physella conoidea (P. Fischer & Crosse, 1886) - Texas Physa2
- Physella cooperi (Tryon, 1865) - Olive Physa2
- Physella costata (Newcomb, 1861) - Ornate Physa2
- Physella cubensis (Pfeiffer, 1839)
- Physella globosa (Haldeman, 1841) - Globose Physa2
- Physella gyrina (Say, 1821)
- Physella hendersoni (Clench, 1925)
- Physella hordacea (I. Lea, 1864) - Grain Physa2
- Physella humerosa (Gould, 1855) - Corkscrew Physa2
- Physella johnsoni (Clench, 1926) - Banff Springs Snail2
- Physella lordi (Baird, 1863) - Twisted Physa2
- Physella magnalacustris (Walker, 1901)
- Physella mexicana (Philippi, 1841) - Polished Physa2
- Physella microstriata (Chamberlin & E. G. Berry, 1930)
- Physella natricina Taylor, 1988
- Physella osculans (Haldeman, 1841) - Cayuse Physa2
- Physella parkeri (Currier, 1881) - Broadshoulder Physa2
- Physella propinqua (Tryon, 1865) - Rocky Mountain Physa2
- Physella sayi
- Physella spelunca (Turner & Clench, 1974)
- Physella squalida (Morelet, 1851) - Squalid Physa2
- Physella traski (I. Lea, 1864) - Sculpted Physa2
- Physella utahensis (Clench, 1925)
- Physella vinosa (Gould, 1847) - Banded Physa2
- Physella virgata (Gould, 1855)
- Physella virginea (Gould, 1847) - Sunset Physa2
- Physella winnipegensis ..., 20044
- Physella wrighti Te & Clarke, 1985
- Physella zionis (Pilsbry, 1926)
References
References
- Haldeman, S. S. 1842-1847. A monograph of the freshwater univalve Mollusca of the United States, including notices of species in other parts of North America. pp. [9 parts], [40 plates]. Philadelphia.
- "Physella". NatureServe Explorer, accessed 9 April 2010.
- Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate Physa acuta are not reproductively isolated from American Physa heterostopha or Physa integra". Invertebrate Biology 121: 226-234.
- (2004) Visaya 1(2).