Bivalvia - Cardiida - Sphaeriidae

Parent taxon: Pisidiidae according to W. P. Woodring 1982

Sister taxon: Sphaerium

Subtaxa: Pisidium amnicum, Pisidium atopum, Pisidium casertanum, Pisidium henslowianum, Pisidium medlicottianum, Pisidium pulchellum, Pisidium pusillum

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Ecology: facultatively mobile infaunal suspension feeder