Pisidium milium

Pisidium milium
Drawing of the left valve internal view of Pisidium milium
Drawing from Dansk Fauna showing the valve articulation and the rectangular form
Conservation status
NE[1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Veneroida
Suborder: Sphaeriacea
Family: Sphaeriidae
Genus: Pisidium
Species: P. milium
Binomial name
Pisidium milium
Held, 1836

Pisidium milium is a species of very small freshwater bivalve in the family Sphaeriidae, the fingernail clams and pea clams.

Description

The 3-4.5mm. shell is tumid (swollen). It is more rectangular than other Pisidium and has broad, swollen umbos which lie behind the mid point. The surface (periostracum) is very glossy, with irregular, concentric striae. The colour is yellow to pale brown.

Distribution

The native distribution of this species is Holarctic.

References

  1. ↑ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 17 May 2007.
  2. ↑ 2.0 2.1 (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.
  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. ↑ 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