phormidium aerugineo-caeruleum phormidium aerugineo-caeruleum phormidium aerugineo-caeruleum is a species of cyanobacteria in the genus phormidium. phormidium aerugineo-caeruleum scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: oscillatoriales family: oscillatoriaceae genus: phormidium species: p. aerugineo-caeruleum binomial name phormidium aerugineo-caeruleumanagn. & komárek (gomont)