Phylum Heterokonta Caval.-Sm. (1986) see Superphylum Heterokonta Caval.-Sm. (1986)
   Subphylum Ochrista Caval.-Sm. (1986), orth. inval. see Phylum Ochrista Caval.-Sm. (1995)
     Infraphylum Raphidoista Caval.-Sm. (1986)
       Superclass Dictyochia Haeckel (1894)
         Class Pelagophycea Andersen & Saunders, 1993, nom. emend. see Class Pelagophyceae R.A. Andersen & G.W.Saunders (1993)
           Order Pelagomonadales Andersen & Saunders (1993)
             Family Pelagomonadaceae R.A. Andersen & G.W.Saunders, in Andersen et al. (1993)
               1 Genus Pelagomonas R.A. Andersen & G.W.Saunders (1993)