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Africa: widely distributed from the Senegal River to the Chad system (Ref. 3575, 57290), including the Volta and Niger basins and many coastal basins in West Africa (Ref. 57290), up to the Nile (Ref. 3575, 28714) and Congo basins (Ref. 45434, 106290, 111328). In Lower Guinea known from most coastal basins (Ref. 81648). |