Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Chytridiomycota Doweld (2001)
     Class Rhizophydiomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
       Order Rhizophydiales Letcher (2006)
         01 Family Alphamycetaceae Letcher (2008)
         02 Family Angulomycetaceae Letcher (2008) [monotypic]
         03 Family Aquamycetaceae Letcher (2008) [monotypic]
         04 Family Batrachochytriaceae Doweld (2013) [monotypic]
         05 Family Coralloidiomycetaceae Doweld (2014) [monotypic]
         06 Family Dinomycetaceae Karpov & Guillou (2014) [monotypic]
         07 Family Globomycetaceae Letcher (2008)
         08 Family Gorgonomycetaceae Letcher (2008) [monotypic]
         09 Family Halomycetaceae Letcher & M.J. Powell (2015)
         10 Family Kappamycetaceae Letcher (2006) [monotypic]
         11 Family Operculomycetaceae Doweld (2014) [monotypic]
         12 Family Pateramycetaceae Letcher (2008) [monotypic]
         13 Family Protrudomycetaceae Letcher (2008) [monotypic]
         14 Family Rhizophydiaceae Letcher (2006) [monotypic]
         15 Family Staurastromycetaceae Van den Wyngaert, K. Seto & K. Rojas (2017) [monotypic]
         16 Family Terramycetaceae Letcher (2006)
         17 Family Uebelmesseromycetaceae M.J. Powell & Letcher (2015) [monotypic]
         18 Genus Homolaphlyctis Longcore, Letcher & T.Y. James (2011), incertae sedis [monotypic]