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.

Graphical Abstract

中文翻译：

---

为了表彰弗朗兹·奥伯温克勒（Franz Oberwinkler），新属的两个新物种和近缘蔷薇科的重要修订版（Exobasidiales，Basidiomycota）

Brachybasidiaceae科是22种已知的植物寄生微真菌科，属于Exobasidiales，Basidiomycota。在这个科中，最大的科迪亚属（Kordyana）的种在气孔开口上方发育出basidia球。基底细胞起源于真菌基质填充气孔下腔。菊科的物种通常会感染菊科的物种。在新热带地区的野外工作中，真菌的形态类似于科尔迪纳菌。被发现在Goeppertia spp上。（syn。Calathea spp。，Marantaceae），即在巴拿马的G. panamensis和G. propinqua上在玻利维亚。根据不同的寄主家族以及ITS和LSU rDNA区域的分子序列数据，提出了这些标本作为科学新属Marantokordyana的代表。在两个宿主物种标本代表了两个新物种，M. oberwinkleriana上G. panamensis和M. boliviana上G.园竹。它们的基底大小和形状，ITS和LSU rDNA区域的分子序列数据以及寄主植物的种类不同。过去，Franz Oberwinkler和他在德国蒂宾根大学的合作者开展的调查显着提高了对近距离蕨科的了解。然而，在物种层面上，由于文献中几个现有名称的物种描述不完整，标本稀缺以及缺少许多分类单元和其他条形码区域的序列数据，我们的知识仍然很贫乏。尤其是科迪亚（Kordyana）物种和狄氏菌属（Dicellomyces）物种需要修订。

图形概要