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

• Chaetomiales: dark brown to black, ostiolate, perithecium that are covered by hairs.
  • Chaetomiaceae: asci evanescent; phaeoamerospores extruded in a cirrhua. Most species decompose cellulose.

Chaetomium. perithecia with the hair covering the ascocarp; what are their function? the almond-shaped ascospores are usually free in the ascocarp and protrude out of the ascocarp by a gelatinous strand called a cirrhus; what is the function of the cirrhus?

classification system (places icons into orders)

index to genera/species