Division Eumycota see Kingdom Eumycota
   Subdivision Phycomycophytina
     1 Class Chytridiomycetes Cejp (1957), nom. inval. see Class Chytridiomycetes Moebius (1929)
     2 Class Hyphochytridiomycetes Alexop. (1962), nom. inval., orth. inval. see Class Hyphochytriomycetes Alexop. (1962), nom. inval.
     3 Class Trichomycetes Alexop. (1962) see Suborder Trichomycina Cavalier-Smith, 2012
     4 Class Oomycetes G.Winter (1880) - oomycetes see Class Peronosporea
     5 Class Zygomycetes G.Winter (1880) see Class Zygomycetes Caval.-Sm. (1998)