different between perithecium vs pseudothecium

English

perithecium (plural perithecia)

(mycology) An ascocarp shaped like a skittle or ball, distinguished by a small pore, the ostiole, through which the spores are released one by one when ripe.

pseudo- +? thecium

pseudothecium (plural pseudothecia)

An ascocarp resembling a perithecium but whose asci are not regularly organised into a hymenium and are bitunicate, having a double wall which expands when it takes up water and shoots the enclosed spores out suddenly to disperse them.

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