Abstract: András Tartally, Botond SZŰCS & Jon Rune Ebsen M.Sc. András Tartally (contact author), Botond Szűcs, Department of Evolutionary Zoology and Human Biology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary. E-mail: tartally@gmail.com Jon Rune Ebsen, Centre of Social Evolution, Department of Population Biology, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark. Myrmecol. News 10: 123 Rickia wasmannii Cavara, 1899 (Ascomycetes: Laboulbeniales) obligately exploits ants (for a review on Laboulbeniales: Weir & Blackwell 2005; and for one especially on myrmecophilous species: Herraiz & Espadaler 2007). The ants appear to be neutral to the presence of this fungus on their cuticules (A. Tartally, pers. obs.). Myrmica Latreille, 1804 (Hymenoptera: Formicidae) species are reported to be the usual hosts of R. wasmannii (Herraiz & Espadaler 2007). To the best of our knowledge, this fungus has not been reported previously from the Carpathian Basin. The occurrence of R. wasmannii was checked on 5788 Myrmica…