Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Sordariomycetidae O.E. Erikss. & Winka (1997)
         Order Diaporthales Nannf. (1932)
           Family Valsaceae Tul. & C.Tul. (1861) see Family Cytosporaceae Fr. (1825)
             Genus Amphiporthe Petr. (1971), nom. protect.