Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Diaporthomycetidae Senan., Maharachch. & K.D.Hyde (2015)
         Order Annulatascales M.J. D'souza, Maharachch. & K.D.Hyde (2015) [monotypic]
           1 Family Annulatascaceae S.W. Wong, K.D.Hyde & E.B.G.Jones (1998)