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Micrographs showing the morphology of the Aspergillus conidiophores exhibited by colonies in Categories 1 and 2. Panels (A,B) show the conidiophore and Hülle cells of colony 34 and represent the morphology of colonies in Category 1 toxic to both sperm cells and PK-15 cells. Panel (C) shows the conidiophores of colony 31 and represents the colonies in Category 2, toxic only to PK-15 cells.
