Cylindrospermopsis is a planktonic genus of filamentous cyanobacteria known for its blooms in eutrophic waters. The type species is the tropical Cylindrospermopsis raciborskii (Woloszynska) Seenayya & Subbaraju. The cyanotoxin cylindrospermopsin was first identified from a species of this genus.[1]
Guiry, M.D.; Guiry, G.M. "Cylindrospermopsis". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.