Pisidium pulchellum

Pisidium pulchellum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Sphaeriida
Family:	Sphaeriidae
Genus:	Pisidium
Species:	P. pulchellum
Binomial name
Pisidium pulchellum Jenyns, 1832

Pisidium pulchellum , the iridescent pea mussel, is a minute species of pea clam, a freshwater bivalve in the family Sphaeriidae.

Pisidium hibernicum and P. pulchellum in Danmarks Fauna

Description

The 3.5–4 mm shell is tumid (swollen), oblique-oval shell. The umbos are broad well and well behind the midpoint. The surface (periostracum) is glossy with regular concentric ribbing. The colour is grey to cream tinged and pinkvor orange from the animal inside.

Distribution and conservation status

• Not listed in IUCN red list – not evaluated (NE)[1]
• Germany – critically endangered (vom Aussterben bedroht) [2]
• Nordic countries: Denmark, Finland, Iceland, Norway and Sweden (not in Faroes)[3]
• Great Britain and Ireland[4]

References

1. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 30 May 2007.
2. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
3. 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
4. Roy Anderson ,2005 An annotated list of the non-marine molluscs of Britain and Ireland Journal of Conchology, 38 (6): 607–637, (published 2005) [1].

External links

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