Physella acuta

Taxobox
name = "Physella acuta"


image_caption = "Physella acuta"
image_width = 225px
status = NE
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Orthogastropoda
superordo = Heterobranchia
ordo = Pulmonata
superfamilia = Planorboidea
familia = Physidae
genus = "Physella"
species = "P. acuta"
binomial = "Physella acuta"
binomial_authority = (Draparnaud, 1805)

"Physella acuta" common name the European physa, is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae.

These snails eat algae, diatoms and other detritus.

hell 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.

Distribution and conservation status

* IUCN red list - not evaluated (NE) [2006 IUCN Red List of Threatened Species. . Cited 30 April 2007.]

Native to Europe.

* Czech Republic - not evaluated (NE) [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)]
* Germany [ [http://www.mollbase.de/sh/physidae/physella_acuta_atl.htm MollBase - Physella acuta - Spitze Blasenschnecke - Atlas 1991 ] ]
* Netherlands [cite web|url=http://www.anemoon.org/anm/voorlopige-kaarten/zoetwatermollusken/wetenschappelijk/physella-acuta |title=Physella acuta|year=2005]

* United States - nonindigenous [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]

References

External links

* http://www.aquarium-kosmos.de/inhalt/50/blasenschnecken-physella-acuta
* [http://www.pesticideinfo.org/List_AquireAll.jsp?Species=899 PAN Pesticides Database - Chemical Toxicity Studies on Physella acuta]