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 Actinochrysea Caval.-Sm. (1995) see Class Dictyochophyceae Silva (1980)
           Subclass Pedinellidae Caval.-Sm. (1986) see Class Dictyochophyceae Silva (1980)
             Order Pedinellales Zimmermann et al. (1984)
               Family Pedinellaceae Pascher (1910)
                 Genus Pseudopedinella N. Carter (1937)