Pisidium conventus
| Pisidium conventus | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Sphaeriida |
| Family: | Sphaeriidae |
| Genus: | Pisidium |
| Species: | P. conventus
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| Binomial name | |
| Pisidium conventus Clessin, 1877
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Pisidium conventus, the arctic-alpine pea clam, is a species of freshwater bivalve from the family Sphaeriidae.
Description
[edit]The small (2.2–2.8 mm.) shell is oval in shape and thin and fragile. It is broad and flattened (laterally compressed) with flattened umbos near the midpoint. The colour is yellowish-white and the periostracum (surface) is silky with fine, concentric striation.
Ecology
[edit]P. conventus is a relict of colder climatic periods found only in deep, cold, upland lakes.
Distribution and conservation status
[edit]- Not listed in IUCN red list – not evaluated (NE)[1]
- Germany – endangered (gefährdet)[2]
- Poland – vulnerable (VU)[3]
- Nordic countries: Faroes, Finland, Norway and Sweden (not in Denmark, Iceland)[4]
- Great Britain and Ireland[5]
References
[edit]- ^ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 30 May 2007.
- ^ Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
- ^ Pisidium conventus - Polish Red Data Book of Animals
- ^ 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) [1].
External links
[edit]- Pisidium conventus at Animalbase taxonomy,short description, biology,status (threats)
- Polish Red Data Book
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