Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Taphrinomycotina O.E. Erikss. & Winka (1997) - basal ascomycetes Class Archaeorhizomycetes Rosling & T.Y. James (2011) [monotypic] Order Archaeorhizomycetales Rosling & T. James (2011) [monotypic] 1 Family Archaeorhizomycetaceae Rosling & T. James (2011) [monotypic]