Pisidium hibernicum

Pisidium hibernicum is a species of freshwater bivalve from the family Sphaeriidae.

Pisidium hibernicum and P. pulchellum in Danmarks Fauna

Pisidium hibernicum
External view of valve of Pisidium hibernicum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Sphaeriida
Family:	Sphaeriidae
Genus:	Pisidium
Species:	P. hibernicum
Binomial name
Pisidium hibernicum Westerlund, 1894[1]

Description

The 2.5-3.5mm. shell is very inflated (convex) hence the common name Globular Pea Shell. The central umbos is prominent. The periostracum (surface) is silky glossy and sculptured by fine, regular striae. In colour it is greyish to brownish white often with scattered red-brown mineral deposits.

Distribution

Its native distribution is Palearctic.

• Czech Republic – endangered (EN), endangered in Bohemia (EN), critically endangered in Moravia^[2][3]
• Slovakia^[4][3]
• Germany – endangered (gefährdet)^[5]
• Nordic countries: Denmark, Faroes, Finland, Iceland, Norway and Sweden^[6]
• Great Britain and Ireland^[7]