coelosphaerium coelosphaerium coelosphaerium is a genus of cyanobacteria belonging to the family merismopediaceae. coelosphaerium colony of coelosphaerium,g — gas vacuolatescale bar ~10 µm scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: synechococcales family: merismopediaceae genus: coelosphaeriumnägeli, 1849 the species of this genus are found in europe, america and australia. species: coelosphaerium aerugineum lemmerm. coelosphaerium confertum west & g.s.west coelosphaerium dubium grunow coelosphaerium evidenter-marginatum m.t.p.azevedo & sant'anna coelosphaerium goetzei schmdle coelosphaerium kuetzingianum nägeli coelosphaerium limnicolum lund coelosphaerium minutissimum lemmerm. coelosphaerium subarcticum komárek & komárk.-legn.