Pflanzenreich Haeckel (1866) - plants
   Division Euthallophyta
     Subdivision Schizophyta
       Class Schizophyceae Cohn (1879) - blue-green algae see Class Schizophyceae Knoblauch 1890
         1 Subclass Coccogoneae
         2 Subclass Hormogoneae
         3 Subclass Psilonemateae
         4 Subclass Trichophoreae