Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Chytridiomycota Doweld (2001)
     Class Polychytriomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
       Order Polychytriales Longcore & D.R. Simmons (2012)
         Family Polychytriaceae Doweld (2014)
           1 Genus Karlingiomyces Sparrow (1960)
           2 Genus Lacustromyces Longcore (1993) [monotypic]
           3 Genus Neokarlingia Longcore & D.R. Simmons (2012) [monotypic]
           4 Genus Polychytrium Ajello (1942) [monotypic]