Pflanzenreich Haeckel (1866) - plants
   Division Euthallophyta
     Subdivision Fungi (Jahn & Jahn, 1959)
       Class Phycomycetes Engl. (1892)
         Series Oomycetes
           1 Order Chytridineae
           2 Order Ancylistineae
           3 Order Saprolegniineae
           4 Order Monoblepharidineae
           5 Order Peronosporineae