Kingdom Protoctista Hogg, 1860
   Phylum Chlorophyta Pascher (1914) - green algae
     Class Ulvophyceae K.R. Mattox & K.D. Stewart (1984) - ulvophytes
       1 Order Ulotrichales Borzi
       2 Order Ulvales Blackman & Tansley
       3 Order Siphonocladales (Blackman & Tansley) Oltmanns see Order Cladophorales Haeckel
       4 Order Dasycladales Pascher (1931)
       5 Order Caulerpales Schaffner (1922) see Order Bryopsidales J.H.Schaffn. (1922)