chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Chromobiota Caval.-Sm. (1991)
       Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts see Superphylum Heterokonta Caval.-Sm. (1986)
         Phylum Bigyra Caval.-Sm. (1998) see Phylum Bigyra Cavalier-Smith, 1998
           Subphylum Pseudofungi Caval.-Sm. (1986) - pseudofungi see Phylum Pseudofungi Caval.-Sm. (1986)
             Class Oomycetes G.Winter (1880) - oomycetes see Class Peronosporea
               1 Genus Phytophthora de Bary (1876)
               2 Genus Achlya Nees (1823)