Regnum Mycetoideum
   Class Hyphomycetes Fr. (1821) see Class Monilia A.Rich. (1832)
     Order Inomycetes
       Suborder Mucedines
         Mucedineae liberæ Nees
           Botrytides Ehrenb.
             Genus Acrosporium Nees (1816), nom. sanct., nom. rej. see Genus Oidium Link (1824), nom. cons.