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 Scenedesmaceae Oltmanns
           1 Genus Scenedesmus F.J.F. Meyen (1829)
           2 Genus Crucigenia C. Morren (1830)
           3 Genus Actinastrum Lagerheim (1882)
           4 Genus Coelastrum Nägeli (1849)