Kingdom Protoctista Hogg, 1860
   Phylum Chlorophyta Pascher (1914) - green algae
     Class Chlorophyceae Wille (1884) - chlorophytes
       Order Chlorococcales Pascher see Order Chlamydomonadales F.E. Fritsch
         Family Hydrodictyaceae Dumort.
           1 Genus Hydrodictyon Roth, nom. cons.
           2 Genus Sorastrum Kützing (1845)
           3 Genus Pediastrum F.J.F. Meyen (1829)
           4 Genus Euastropsis Lagerheim (1895)