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
	; Least Concern (IUCN 3.1)(Global,Europe)
	; Critically endangered, possibly extinct (IUCN 3.1) (North & Pan-Africa)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Sphaeriida
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 3.0- to 4.5-mm shell is tumid (swollen). It is more rectangular than other Pisidium species and has broad, swollen umbos which lie behind the midpoint. 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.

Czech Republic –in Bohemia, in Moravia,^[2] vulnerable (VU)^[3]
Slovakia^[2]
Germany – (Arten der Vorwarnliste)^[4]
Nordic countries: Denmark, Faroes, Finland, Iceland, Norway and Sweden^[5]
Great Britain and Ireland^[6]

References

^ Van Damme, D.; Ghamizi, M. (2010). "Pisidium milium (Northern Africa & Pan-Africa assessment)". IUCN Red List of Threatened Species. 2010: e.T155923A4866857. Retrieved 30 June 2024.
^ ^a ^b 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. (in Czech)
^ Red List of the molluscs (Mollusca) of the Czech Republic http://mollusca.sav.sk/malacology/redlist.htm
^ 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.; 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

Pisidium milium at Animalbase taxonomy,short description, biology,status (threats), images
Images at BOLD.

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[IUCN-1] Van Damme, D.; Ghamizi, M. (2010). "Pisidium milium (Northern Africa & Pan-Africa assessment)". IUCN Red List of Threatened Species. 2010: e.T155923A4866857. Retrieved 30 June 2024.

[Horsák_2010-2] 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. (in Czech)

[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

[kuiper1989-5] 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

[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) [1].

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