PYRENOMYCETIDAE (or Hymenomycetidae--the Pyrenomycetes): asci borne in a layer; ascocarp a cleistothecium or a perithecium; contains Chaetomiales, Clavicipitales, Coronophorales, Diaportheales, Erysiphales, Hypocreales, Phyllachorales, Sordariales, and Xylariales

• Xylariales: ascocarps perithecia or cleistothecia, persistent, dark, leathery or carbonous; ascus unitunicate and in a hymenium; stroma present or absent. families: Xylariaceae, Diatrypaceae.
  • Diatrypaceae: ascus unitunicate, apex amyloid; stroma present or absent; ascospores allantoid (sausage-shaped)

DiatrypeStroma imbedded in substrate; perithecia present.	Ascus with amyloid apex and sausage shaped ascospores

Eutypa

ascostromata imbedded in wood left: surface view; right: section through ascostromata
Eutypa

classification system (places icons into orders)

index to genera/species