Belonopsis excelsior (P. Karst.) Rehm, the type species of Belonopsis, is characterized by extremely long ascospores (42–50 μm length) with multi-septa (Rehm 1896) and has been accommodated in several genera, such as Belonium (Boudier 1907) and Niptera Fr. (Dennis 1972). Dennis (1972) transferred some species of Belonopsis that occur on submerged grasses to Niptera including Belonopsis excelsior but withheld any taxonomic treatment for other terrestrial species of Belonopsis. Currently, Species Fungorum adopts “Belonium” excelsior (P. Karst.) Boud. However, the genus Belonium is also taxonomically problematic, and Baral (1994) pointed out that the generic name “Belonium” is used contrary to the nomenclatural rules and proposed to abandon the ambiguously used “Belonium” by transferring only the type species, Belonium graminis (Desm.) Sacc., to Cejpia Velen. (Incertae sedis, but closely related to Pyrenopezizaceae and Mollisiaceae), and the remaining species to Pyrenopeziza Fuckel. Therefore, applying “Belonium” to Belonopsis excelsior seems inappropriate even if the species is different from other Belonopsis species.