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] Genus Castanediella Hern.-Restr., Crous & M.J. Wingf. (2015)