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.

Ecology

In Europe it requires high levels of calcium and clean water.

References

  1. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 17 May 2007.
  2. Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
  3. 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.
  4. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2
  5. 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
  6. 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