Xylariomycetidae

Xylariomycetidae is a subclass of sac fungi.

Orders
As accepted by Wijayawardene et al. 2020;
 * Amphisphaeriales (15 families)
 * Amphisphaeriaceae (4)
 * Apiosporaceae (4)
 * Beltraniaceae (9)
 * Castanediellaceae (1)
 * Clypeophysalosporaceae (4)
 * Hyponectriaceae (17)
 * Iodosphaeriaceae (1)
 * Melogrammataceae (1)
 * Oxydothidaceae (1)
 * Phlogicylindriaceae (3)
 * Pseudomassariaceae (4)
 * Pseudosporidesmiaceae (1)
 * Pseudotruncatellaceae (1)
 * Sporocadaceae (35)
 * Vialaeaceae (1)
 * Delonicicolales
 * Delonicicolaceae (2 genera)
 * Leptosilliaceae (1)
 * Xylariales (ca 20 families)
 * Anungitiomycetaceae (3)
 * Barrmaeliaceae (2)
 * Cainiaceae (10)
 * Clypeosphaeriaceae (7)
 * Coniocessiaceae (2)
 * Diatrypaceae (22)
 * Fasciatisporaceae (1)
 * Graphostromataceae (5)
 * Hansfordiaceae (1)
 * Hypoxylaceae (18)
 * Induratiaceae (2)
 * Lopadostomataceae (4)
 * Microdochiaceae (3)
 * Polystigmataceae (1)
 * Nothodactylariaceae (1)
 * Requienellaceae (4)
 * Vamsapriyaceae (1)
 * Xyladictyochaetaceae (2)
 * Xylariaceae (38)
 * Zygosporiaceae (1)