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Cyanobacteria genera, potentially toxins producers in Mediterranean artificial lakes: (a,b): different species of Dolichospermum from Lake Bidighinzu; (c,d): different species of Microcystis from Lake Liscia and Lake Monte Lerno; (e,f): different species of Aphanizomenon, in single tricome from Lake Temo and in fascicle of tricomes from Lake Liscia. A: heterocyst, B: akinete; C: vegetative cells; bar 50 µm.
