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Abstract:
A comparative study of the ultrastructure in sections of the ascospores of six Hanseniaspora species showed three types of spores: (1) hat-shaped in H. valbyensis and H. guilliermondii, (2) spherical with an equatorial or subequatorial ledge, smooth or rough in H. occidentalis and H. uvarum, (3) spherical with warts in H. osmophila and H. vineae. Development and germination of the spores of Hanseniaspora guilliermondii is described in more detail.