Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Eurotiomycetes O.E. Erikss. & Winka (1997)
       Subclass Chaetothyriomycetidae Doweld (2001)
         Order Phaeomoniellales K.H. Chen, A.E. Arnold, Gueidan & Lutzoni (2015)
           1 Family Celotheliaceae Lücking, Aptroot & Sipman (2008) [monotypic]
           2 Family Phaeomoniellaceae P.M.Kirk (2015)
           3 Genus Moristroma A.I. Romero & Samuels (1991), incertae sedis