Kingdom Fungi R.T.Moore (1980) - fungi Phylum Chytridiomycota Doweld (2001) Class Rhizophlyctidomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic] Order Rhizophlyctidales Letcher (2008) 1 Family Arizonaphlyctidaceae Letcher (2008) [monotypic] 2 Family Borealophlyctidaceae Letcher (2008) [monotypic] 3 Family Rhizophlyctidaceae H.E. Petersen (1909) [monotypic] 4 Family Sonoraphlyctidaceae Letcher (2008) [monotypic]