1) Class 2) Class plectomycetes 
In general, a group of primitive or reduced ascomycetous forms that have an angiocarpous fructification without an ostiole, the entire interior of which is irregularly penetrated by ascogenous hyphae, with the result that the generally spherical asci, without accompanying paraphyses or other threads, lie scattered irregularly in a pseudoparenchymat...
[n] - class of fungi in which the fruiting body is a cleistothecium (it releases spores only on decay or disintegration)
class Plectomycetes noun class of fungi in which the fruiting body is a cleistothecium (it releases spores only on decay or disintegration)