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 Diatrypaceae Nitschke (1869) Genus Libertella Desm. (1830)