chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Chromobiota Caval.-Sm. (1991)
       Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts see Superphylum Heterokonta Caval.-Sm. (1986)
         Phylum Ochrophyta Caval.-Sm. (1995)
           Subphylum Phaeista Caval.-Sm. (1995)
             Infraphylum Hypogyrista Caval.-Sm. (1995) see Superclass Hypogyristia Caval.-Sm. (2006)
               Class Pelagophyceae R.A. Andersen & G.W.Saunders (1993) see Class Dictyochophyceae Silva (1980)
                 1 Genus Pelagomonas R.A. Andersen & G.W.Saunders (1993)
                 2 Genus Sarcinochrysis Geitler (1930)