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)
         Family Alphamycetaceae Letcher (2008)
           1 Genus Alphamyces Letcher (2008) [monotypic]
           2 Genus Betamyces Letcher (2012) [monotypic]
           3 Genus Gammamyces Letcher (2012) [monotypic]