Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Xylariomycetidae O.E. Erikss. & Winka (1997)
         Order Xylariales Nannf. (1932)
           Family Castanediellaceae Hern.-Restr., Guarro & Crous (2017) [monotypic]
             1 Genus Castanediella Hern.-Restr., Crous & M.J. Wingf. (2015)