chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Protozoa Goldfuss, 1818 - protozoa
     Infrakingdom Alveolata Cavalier-Smith, 1991 see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Myzozoa Cavalier-Smith & Chao, 2004 see Subphylum Myzozoa Cavalier-Smith & Chao, 2004
         Subphylum Dinozoa Cavalier-Smith, 1981 see Infraphylum Dinozoa Cavalier-Smith, 1981
           Infraphylum Dinoflagellata Bütschli, 1885 see Superclass Dinoflagellata Bütschli, 1885
             Superclass Dinokaryota Fensome et al., 1993
               Class Peridinea Ehrenberg, 1830
                 Subclass Suessioidia Cavalier-Smith, 2004 [monotypic]
                   Order Suessiida Fensome, Taylor, Norris, Sarjeant, Wharton & Williams, 1993 see Order Suessiales Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993)
                     Genus Polarella Montresor, Procaccini & Stoecker, 1999 see Genus Polarella Montresor, Procaccini & Stoecker (1999)