Pisidium pseudosphaerium
Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.
| Pisidium pseudosphaerium | |
|---|---|
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| Photo of external view of the left valve of Pisidium pseudosphaerium | |
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| Photo of external umbilical view of both valves of Pisidium pseudosphaerium. (Left valve is on the lef, right valve is on the right.) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Sphaeriida |
| Family: | Sphaeriidae |
| Genus: | Pisidium |
| Species: | P. pseudosphaerium |
| Binomial name | |
| Pisidium pseudosphaerium Favre, 1927 | |
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,[2] critically endangered (CR)[3]
- Germany - critically endangered (vom Aussterben bedroht) [4]
- Nordic countries: Denmark, Finland (near threatened[5]), Norway and Sweden (not recorded in Faroes, Iceland)[6]
- Great Britain and Ireland [7]
References
- Killeen, I. (2011). "Pisidium pseudosphaerium". IUCN Red List of Threatened Species. 2011: e.T155821A4849042. doi:10.2305/IUCN.UK.2011-2.RLTS.T155821A4849042.en.
- (in Czech) 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.
- Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
- Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
- "Threatened and Near Threatened molluscs". www.environment.fi. Finnish Environment Institute. 2001. Archived from the original on 11 May 2013. Retrieved 11 April 2012.
- Kuiper, J. G. J.; Økland, K. A.; Knudsen, J.; Koli, L.; von Proschwitz, T. & Valovirta, I. (1989), "Geographical distribution of the small mussels (Sphaeriidae) in North Europe (Denmark, Faroes, Finland, Iceland, Norway and Sweden)" (PDF), Annales Zoologici Fennici, 26 (2): 73–101
- Roy Anderson ,2005 An annotated list of the non-marine molluscs of Britain and Ireland Journal of Conchology, 38 (6): 607–637, (published 2005) .
External links
- Pisidium pseudosphaerium at Animalbase taxonomy,short description, biology,status (threats), images
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