Kingdom Protoctista Hogg, 1860
   Phylum Cryptophyta Caval.-Sm. (1986) - cryptomonads see Superclass Cryptomonada Cavalier-Smith, 2004
     Class Cryptophyceae F.E. Fritsch (1927)
       Order Cryptomonadales Pascher (1913)
         Genus Cryptomonas Ehrenb. (1831)
           1 Cryptomonas maculata R.W. Butcher
           2 Cryptomonas erosa Ehrenb. (1832)
           3 Cryptomonas obovata
           4 Cryptomonas ovata Ehrenb. (1832)
           5 Cryptomonas rufescens