Pisidium pseudosphaerium explained

Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.

Description

The 2.5-3.2mm shell is a flattened, regular, slightly angulated oval shape with low central umbos. The surface is silky with very fine concentric striations. In colour it is straw-yellow with scattered red-brown deposits.

Distribution

Its native distribution is central European and western European.

• Czech Republic - in Bohemia, in Moravia,^[1] critically endangered (CR)^[2]
• Germany - critically endangered (vom Aussterben bedroht) ^[3]
• Nordic countries: Denmark, Finland (near threatened^[4]), Norway and Sweden (not recorded in Faroes, Iceland)
• Great Britain and Ireland^[5]

External links

• Pisidium pseudosphaerium at Animalbase taxonomy,short description, biology,status (threats), images

Notes and References

1. Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF.
2. Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
3. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109,
4. Web site: Threatened and Near Threatened molluscs . 2001 . www.environment.fi . Finnish Environment Institute . 11 April 2012 . dead . https://web.archive.org/web/20130511195046/http://www.ymparisto.fi/default.asp?node=8662&lan=en . 11 May 2013 .
5. Roy Anderson,2005 An annotated list of the non-marine molluscs of Britain and Ireland Journal of Conchology, 38 (6): 607–637, (published 2005)http://www.conchsoc.org/sites/default/files/MolluscWorld/Anderson-2008.pdf.