First record of Stigmatomyces (Ascomycota: Laboulbeniales) on Drosophilidae from Japan.

Three Stigmatomyces species were detected on five drosophilid species from Japan. We report Stigmatomyces majewskii on Drosophila rufa and Drosophila suzukii , Stigmatomyces scaptodrosophilae on Scaptodrosophila coracina and Scaptodrosophila subtilis , and Stigmatomyces sacaptomyzae on Scaptomyza graminum . Except for Scaptomyza graminum , each of these species is a newly identified Stigmatomyces host. Our discovery that D. suzukii is a host of S. majewskii may provide new pest management approaches for this global agricultural pest insect.