Pisidium amnicum
| Pisidium amnicum | |
|---|---|
 | |
| Conservation status | |
| NE[1] | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Subclass: | Heterodonta |
| Order: | Veneroida |
| Suborder: | Sphaeriacea |
| Family: | Sphaeriidae |
| Genus: | Pisidium |
| Species: | P. amnicum |
| Binomial name | |
| Pisidium amnicum (O. F. Müller, 1774) | |
Pisidium amnicum is a species of very small freshwater clam. It is sometimes known as the greater European peaclam River pea shell.It is an aquatic bivalve in the family Sphaeriidae.
Description
Although only 9 mm (range 7-11 mm.) in length, this species is considerably larger than most Pisidium species, and has a fairly thick, concentrically ridged shell.This is glossy and triangular oval in shape. The shell is solid, and has broad but not prominent umbos often coated with a dull ferruginous deposit.The colour is grey-white to brown often with a greenish cast.
Distribution
Its native distribution is Palearctic. The species has been introduced to northeastern North America.
- Czech Republic - endangered (EN), endangered in Bohemia (EN), critically endangered in Moravia[2][3]
- Slovakia[3]
- Germany - high endangered (Stark gefährdet) [4]
- Nordic countries: Denmark, Finland, Iceland, Norway and Sweden (not in the Faroe Islands)[5]
- Great Britain and Ireland [6]
Ecology
In Europe it requires high levels of calcium and clean water.
References
- ↑ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 17 May 2007.
- ↑ Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
- ↑ 3.0 3.1 (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.
- ↑ Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
- ↑ Kuiper, J. G. J.; Økland, K. A., Knudsen, J., Koli, L., von Proschwitz, T., and Valovirta, I. (1989), "Geographical distribution of the small mussels (Sphaeriidae) in North Europe (Denmark, Faroes, Finland, Iceland, Norway and Sweden)", 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 amnicum at Animalbase taxonomy, biology,status (threats), images