organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Phylum Oomycota Arx (1967)
         Class Oomycetes G.Winter (1880) - oomycetes see Class Peronosporea
           Order Leptomitales Kanouse (1927)
             1 Family Apodachlyellaceae M.W. Dick (1986)
             2 Family Ducellieriaceae M.W. Dick (2001)
             3 Genus Blastulidium Pérez (1903), incertae sedis
             4 Family Leptolegniellaceae M.W. Dick (1971)
             5 Family Leptomitaceae Kütz. (1843)