Riomyces Ferrer et al.
Index Fungorum number: IF561099
Sexual morph: Ascomata on submerged wood, immersed to erumpent in the substrate, globose to subglobose, membranous, black, ostiolate. Neck short, dark brown. Hamathecium composed of globose, hyaline, deliquescent cells. Asci unitunicate, broadly cylindrical, thin-walled, short-pedicellate, lacking an apical pore and other apical structures, eight-spored, uniseriate. Ascospores ellipsoidal-fusiform, hyaline, septate, not constricted at septa, thick-walled, surrounded by a gelatinous sheath. Asexual morph: Undetermined
Notes: Riomyces was introduced by Ferrer et al. (2012) to accommodate a single species R. rotundus, based on morphology and phylogenetic analyses of LSU sequence data. It was found on submerged decaying wood in freshwater in Costa Rica
Type species: Riomyces rotundus A. Ferrer, A.N. Mill., Sarmiento & Shearer
Zhang H, Dong W, Hyde KD, Maharachchikumbura SSN, Hongsanan S, Bhat DJ, Al-Sadi AM, Zhang D (2017a) Towards a natural classification of Annulatascaceae-like taxa: introducing Atractosporales ord. nov. and six new families. Fungal Divers 85:75–110
Ferrer A, Miller AN, Sarmiento C, Shearer CA. (2012) Three new genera representing novel lineages of Sordariomycetidae (Sordariomycetes, Ascomycota) from tropical freshwater habitats in Costa Rica. Mycologia 104, 865–879.