: Alona quadrangularis.

The carapace in Alona quadrangularis is highest close to the posterior end. It is a quite common littoral chydorid, which is found in all parts of Norway. The species is rare in acid waters and characterized as moderate acid sensitive.

Alona quadrangularis O.F.M.
Creative Commons Attribution | Bjørn Walseng | Norsk institutt for naturforskning
Kart. Utbredelse i Norge.