Ascospore Morphology and Ultrastructure of Species Assigned to the Genus Lipomyces Lodder et Kreger-van Rij

Ascospores of Lipomyces species were examined by transmission electron microscopy. The following four types of ascospore morphology were found in replicas: (i) ascospores with longitudinal ridges; (ii) ascospores with irregular folds; (iii) ascospores with slightly undulating surfaces; and (iv) ascospores with smooth surfaces. In contrast, on the basis of ultrastructure of thin sections, only three types of ascospores were identified.