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Latitudinal distribution of historic diarrhetic shellfish poisoning (DSP) outbreaks in Chile, associated with D. acuta and D. acuminata. Asterisks indicate sites where cell maxima occurred during the two most severe events of D. acuta in Aysén region in summer 2018 (* 664,000 cells L−1) and 1991 (** 7000 cells L−1).
