oxyphototroph prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes
     Order Oscillatoriales Schaffner (1922) see Order Oscillatoriales Schaffner 1922
       Family Phormidiaceae Anagn. & Komárek (1988) see Family Oscillatoriaceae Engl. (1898), nom. cons.
         Subfamily Microcoleoideae Hansgirg (1892)
           Form genus Symplocastrum (Gomont) O. Kirchner (1898) see Genus Symplocastrum (Gomont 1892) Kirchner 1898