Pisidium pseudosphaerium

Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.

Pisidium pseudosphaerium
Photo of external view of the left valve of Pisidium pseudosphaerium
Photo of external umbilical view of both valves of Pisidium pseudosphaerium. (Left valve is on the lef, right valve is on the right.)
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Sphaeriida
Family:	Sphaeriidae
Genus:	Pisidium
Species:	P. pseudosphaerium
Binomial name
Pisidium pseudosphaerium Favre, 1927

Description

The 2.5-3.2mm shell is a flattened, regular, slightly angulated oval shape with low central umbos. The surface is silky with very fine concentric striations. In colour it is straw-yellow with scattered red-brown deposits.

Distribution

Its native distribution is central European and western European.

• Czech Republic - in Bohemia, in Moravia,^[2] critically endangered (CR)^[3]
• Germany - critically endangered (vom Aussterben bedroht) ^[4]
• Nordic countries: Denmark, Finland (near threatened^[5]), Norway and Sweden (not recorded in Faroes, Iceland)^[6]
• Great Britain and Ireland^[7]