Evaluation of uptake and chronic toxicity of virgin polystyrene microbeads in freshwater zebra mussel Dreissena polymorpha (Mollusca: Bivalvia).

•Few information about microplastic toxicity in freshwaters were available.•Uptake/toxicity of virgin polystyrene microbeads (PMs) were evaluated in zebra mussel.•PMs are concentrated in the gut lumen, tissues and hemolymph of zebra mussel.•PMs induce a low alteration of oxidative status and dopamine level in zebra mussel.•A considerable uptake and low toxicity summarize the effects of PMs in zebra mussel.