Physella acuta
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| Physella acuta | ||||||||||||||||||||
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 Physella acuta
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NE
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| Physella acuta (Draparnaud, 1805) |
Physella acuta common name the European physa, is a species of small, left-handed orsinistral, air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae.
These snails eat algae, diatoms and other detritus.
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[edit] Shell description
These small snails are quite distinctive, because they have shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then 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.
[edit] Distribution and conservation status
- IUCN red list - not evaluated (NE)[1]
Native to Europe.
- United States - nonindigenous[5]
[edit] References
- ^ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 30 April 2007.
- ^ Beran, L. (2002) Vodní měkkýši České Republiky - rozšíření a jeho změny, stanoviště, šíření, ohrožení a ochrana, červený seznam. Aquatic moluscs of the Czech Republic - distribution and its changes, habitats, dispersal, threat and protection, Red List. - Sborník přírodovědného klubu v Uherském Hradišti, Supplementum 10, 258 pp. (in Czech)
- ^ MollBase - Physella acuta - Spitze Blasenschnecke - Atlas 1991
- ^ Physella acuta (2005).
- ^ Amy Benson. 2007. Physella acuta. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=1025 Revision Date: 4/22/2004
[edit] External links
- http://www.aquarium-kosmos.de/inhalt/50/blasenschnecken-physella-acuta
- PAN Pesticides Database - Chemical Toxicity Studies on Physella acuta
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