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) Genus Gammamyces Letcher (2012) [monotypic] Gammamyces ourimbahensisᵀ Letcher