Phialide and phialospore ontogeny ofPhialophora lagerbergii(Melin and Nannf.) Conant,Penicillium corylophilumDierckx, and the imperfect state ofCeratocystis paradoxa(Dade) Moreau are illustrated by time-lapse photomicrography, and a unified concept of the phialide is derived.
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