life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Eukaryota (Chatton, 1925) see Domain Eukaryota Chatton, 1925
     Superkingdom Metakaryota see Domain Eukaryota Chatton, 1925
       Kingdom Chromista Caval.-Sm. (1981) - chromists
         Subkingdom Euchromista Cavalier-Sm. (1993) see [unranked] Stramenopila
           Infrakingdom Chromobiota Caval.-Sm. (1986)
             Phylum Heterokonta Caval.-Sm. (1986) see Superphylum Heterokonta Caval.-Sm. (1986)
               Subphylum Pseudofungi Caval.-Sm. (1986) - pseudofungi see Phylum Pseudofungi Caval.-Sm. (1986)
                 Class Pythiistea Caval.-Sm. (1986)
                   1 Subclass Oomycetidae Winter (1879)
                   2 Subclass Hyphochytridae Caval.-Sm. (1990), nom. inval. see Subclass Hyphochytriomycetidae M.W.Dick (2001)