chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Cryptista Caval.-Sm. (1986) [monotypic] see Phylum Cryptista Caval.-Sm. (1990), orth. inval.
       Phylum Cryptista Caval.-Sm. (1990), orth. inval. see Phylum Cryptista Cavalier-Smith, 1986
         Subphylum Cryptomonada Caval.-Sm. (2004) see Superclass Cryptomonada Cavalier-Smith, 2004
           Class Cryptophyceae F.E. Fritsch (1927)
             1 Genus Guillardia D.R.A. Hill & R. Wetherbee (1990)