Kingdom Protoctista Hogg, 1860
   Phylum Chytridiomycota Arx (1967), nom. inval. see Phylum Chytridiomycota Doweld (2001)
     1 Class Chytridiomycetes Cejp (1957), nom. inval. see Class Chytridiomycetes Moebius (1929)