E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Pisidium rotundatum is widespread in Canada south of the tree line, also occurring in the northern tier of US states and south in the Rocky Mountains to Mexico (Clarke, 1981). It is most common in ponds, bogs, lagoons, floodplains, and large and small lakes with substrates consisting of mud, marly clay, sand or, occasionally, gravel. It also occurs in temporary ponds (Mackie, 2007). It usually takes shelter among dead leaves of trees (Herrington, 1962).

Note Author: Ian Gardiner