Order Microascales Parasitic on plants; asci evanescent (quickly deteriorating), borne at different levels in perithecia with ostioles, or sometimes with a long necklike structure terminating in a pore; included in subclass Hypocreomycetidae; example genera include Microascus, Petriella, Halosphaeria, Lignincola, and Nimbospora. Order Boliniales
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