Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Pezizomycetes O.E. Erikss. & Winka (1997) [monotypic] Order Pezizales J.Schröt. (1894) Family Pyronemataceae Corda (1842) Genus Byssonectria P.Karst. (1881)