Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Sordariomycetes O.E. Erikss. & Winka (1997) Subclass Diaporthomycetidae Senan., Maharachch. & K.D.Hyde (2015) Order Ophiostomatales Benny & Kimbr. (1980) Family Ophiostomataceae Nannf. (1932) Genus Pesotum J.L. Crane & Schokn. (1973)