Sequence analysis of the D1/D2 domain of 26S rDNA was conducted upon seven Arthroascus strains from different geographic localities. The European and Asian species Arthroascus schoenii was documented from the North-American continent and from the Island of Hawaii. We discuss the heterogeneity of the genus Saccharomycopsis sensu Kurtzman and Robnett 1995. On the basis of molecular and genetic data the genus Arthroascus von Arx is reinstated.
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