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.

University of Galway.

This Cyanobacteria-related article is a stub.