6 (2) Hyphae attached to the digestive tract or cuticle 



of arthropods Trichomycetes 



6 (2) Hyphae saprobic or parasitic on algae, phanerogams or other cellulosic materials 7 



7 (6) Sexually formed spores lacking; conidia usually formed in pyc- 



nidia (Fig. 4) or directly on vegetative hyphae . . . . Deuteromycetes (p. 32) 



7 (6) Sexually formed spores present 8 



8 (7) Sexual spores, usually 8 in number, produced endogenously 



within asci Ascomycetes (p. 11) 



10 



