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 Microdochiaceae Hern.-Restr., Crous & J.Z. Groenew. (2016) Genus Idriella P.E. Nelson & S. Wilh. (1956)