living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Thallobionta
         Division Eumycota see Kingdom Eumycota
           Subdivision Mastigomycotina
             Class Oomycetes G.Winter (1880) - oomycetes see Class Peronosporea
               Order Saprolegniales
                 ?Family Leptolegniellaceae M.W. Dick (1971)
                   1 Genus Leptolegniella Huneycutt (1952)
                   2 Genus Brevilegniella M.W. Dick (1961)
                   3 Genus Aphanodictyon Huneycutt ex M.W. Dick (1971)
                   4 Genus Aphanomycapsis see Genus Aphanomycopsis Scherff. (1925)
                   5 Genus Nematophthora Kerry & D.H. Crump (1980)