Abstract

Septa of Eremothecium ashbyii are complete crosswalls (not plugs) and develop by centripetal growth of the hyphal wall. The structure and behavior of spindle pole bodies appear very similar to those of other hemiascomycetous yeasts. Nuclear divisions within spore sacs appear to be uninuclear meiotic divisions. Spore-delimiting membranes develop around individual lobes of dividing nuclei. Wall material forms between the spore-delimiting membranes and consists of an inner light primary layer and an outer dense secondary layer. Spore sacs of E. ashbyii are interpreted as true hemiasci.

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