Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Dothideomycetes O.E. Erikss. & Winka (1997) Family Diademaceae Shoemaker & C.E. Babc. (1992) Genus Diadema Shoemaker & C.E. Babc. (1989)