Phormidium is a common genus of cyanobacteria with a cosmopolitan distribution. This genus is in the family Oscillatoriaceae. Species in this genus will produce a range of cyanotoxins. Under favorable conditions, Phormidium forms continuous and large mats, which are documented to harbor various species of bacteria or algae.
As a result of recent genetic analyses, several new genera were erected from this genus, e.g. Potamolinea.
↑McAllister, Tara G.; Wood, Susanna A.; Hawes, Ian (May 2016). "The rise of toxic benthic Phormidium proliferations: A review of their taxonomy, distribution, toxin content and factors regulating prevalence and increased severity". Harmful Algae. 55: 282–294. doi:10.1016/j.hal.2016.04.002. PMID28073542.
↑Martins, Mariéllen Dornelles; Branco, Luis Henrique Zanini (2016). "Potamolinea gen. Nov. (Oscillatoriales, Cyanobacteria): A phylogenetically and ecologically coherent cyanobacterial genus". International Journal of Systematic and Evolutionary Microbiology. 66 (9): 3632–3641. doi:10.1099/ijsem.0.001243. hdl:11449/173597. PMID27307052.