Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Lecanoromycetes O.E. Erikss. & Winka (1997)
       Subclass Ostropomycetidae V. Reeb, Lutzoni & Cl.Roux (2004)
         Order Pertusariales M. Choisy ex D.Hawksw. & O.E. Erikss. (1986)
           Family Megasporaceae Lumbsch (1994)
             Genus Megaspora (Clauzade & Cl.Roux) Hafellner & V. Wirth (1987)