Pisidium supinum

Pisidium supinum is a species of minute freshwater clam, a pea clam, an aquatic bivalve mollusc in the family Sphaeriidae (the fingernail clams and pea clams.)

Pisidium supinum
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Subclass:	Heterodonta
Order:	Sphaeriida
Family:	Sphaeriidae
Genus:	Pisidium
Species:	P. supinum
Binomial name
Pisidium supinum A. Schmidt, 1851

The shell of this species is 3 to 5 mm in size, and is roughly triangular in shape.

Distribution

Its native distribution is Palearctic.

• Czech Republic – in Bohemia, in Moravia,[2] vulnerable (VU)[3]
• Germany – endangered (gefährdet)[4]
• Nordic countries: Denmark, Finland (endangered[5]), Norway and Sweden (not recorded in Faroes, Iceland)[6]

References

1. Prie, V. (2011). "Pisidium supinum". IUCN Red List of Threatened Species. 2011. Retrieved 11 April 2012.CS1 maint: ref=harv (link)old-form url
2. (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.
3. Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
4. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
5. "Threatened and Near Threatened molluscs". www.environment.fi. Finnish Environment Institute. 2001. Archived from the original on 11 May 2013. Retrieved 11 April 2012.
6. 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