Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Sordariomycetes O.E. Erikss. & Winka (1997) Subclass Hypocreomycetidae O.E. Erikss. & Winka (1997) Order Hypocreales Lindau (1897) Family Niessliaceae Kirschst. (1939) Genus Circioniesslia O.E. Erikss. (2006), orth. inval. see Genus Circinoniesslia Samuels & M.E.Barr (1998)