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The Brachybasidiaceae are a family of 22 known species of plant-parasitic microfungi belonging to Exobasidiales, Basidiomycota. Within this family, species of the largest genus  Kordyana  develop balls of basidia on top of stomatal openings. Basidial cells originate from fungal stroma filling substomatal chambers. Species of  Kordyana  typically infect species of Commelinaceae. During fieldwork in the neotropics, fungi morphologically similar to  Kordyana  spp. were found on  Goeppertia  spp. (syn.  Calathea  spp., Marantaceae), namely on  G. panamensis  in Panama and on  G. propinqua  in Bolivia. These specimens are proposed as representatives of a genus new to science,  Marantokordyana , based on the distinct host family and molecular sequence data of ITS and LSU rDNA regions. The specimens on the two host species represent two species new to science,  M. oberwinkleriana  on  G. panamensis  and  M. boliviana  on  G. propinqua . They differ by the size and shape of their basidia, molecular sequence data of ITS and LSU rDNA regions, and host plant species. In the past, the understanding of Brachybasidiaceae at order and family level was significantly improved by investigation realized by Franz Oberwinkler and his collaborators at the University of Tübingen, Germany. On species level, however, our knowledge is still very poor due to incomplete species descriptions of several existing names in literature, scarceness of specimens, as well as sequence data lacking for many taxa and for further barcode regions. Especially species of  Kordyana  and species of  Dicellomyces  are in need of revision.

Two new species in a new genus and a critical revision of Brachybasidiaceae (Exobasidiales, Basidiomycota) in honor of Franz Oberwinkler