Pflanzenreich Haeckel (1866) - plants
   Division Euthallophyta
     Subdivision Schizophyta
       Class Schizophyceae Cohn (1879) - blue-green algae see Class Schizophyceae Knoblauch 1890
         Subclass Psilonemateae
           1 Family Oscillatoriaceae Engl. (1898), nom. cons. see Family Oscillatoriaceae Engler 1898 nom. cons.
           2 Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
           3 Family Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886
           4 Family Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.