asexual fungi R.T.Moore (1980) - fungi
   Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
     Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
       Class Dothideomycetes O.E. Erikss. & Winka (1997)
         Subclass Pleosporomycetidae C.L. Schoch, Spatafora, Crous & Shoemaker (2007)
           Order Pleosporales Luttr. ex M.E.Barr (1987)
             Family Leptosphaeriaceae M.E.Barr (1987)
               Anamorph genus Alternariaster E.G. Simmons (2007)