cylindrospermum cylindrospermum cylindrospermum is a genus of filamentous cyanobacteria found in terrestrial and aquatic environments. in terrestrial ecosystems, cylindrospermum is found in soils, and in aquatic ones, it commonly grows as part of the periphyton on aquatic plants. the genus is heterocystous (nitrogen-fixing) cyanobacteria. cylindrospermum illustration of cylindrospermum stagnale. h, heterocyst; sp, resting spore scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: nostocales family: nostocaceae genus: cylindrospermumkützing ex bornet & flahault, 1886 species c. alatosporum c. badium c. catenatum c. licheniforme c. majus c. marchicum c. michailovskoense c. moravicum c. muscicola c. pellucidum c. siamensis c. skujae c. stagnale illustration of "cylindrospermum stagnale". h, heterocyst; sp, resting spore