I have collected a male specimen of Drosophila (Sophophora) ambigua Pomini bearing a few thalli of Stigmatomyces majewskii H.Dainat, Manier et Balazuc on mouthparts. The fly was identified by Jan Maca (Czechia); the fungi were identified by Walter Rossi (Italy).
Walter Rossi is still working on a large monograph dealing with Laboulbeniales parasitic on the Diptera. He is interested in receiving any fly bearing Laboulbeniales from any corner of the world.
Below you can see a photo and a video of the living specimen.