Roussoella Sacc., Atti dell´Istituto Veneto Scienze, 6: 410 (1888).

MycoBank number: MB 4799; Index Fungorum number: IF 4799; Facesoffungi number: FoF 01689; 33 morphological species (Mapook et al. 2020, Phukhamsakda et al. 2020, Species Fungorum 2020), 22 species with molecular data.

Type species. Roussoella nitidula Sacc. & Paol., Atti Inst. Veneto Sci. lett., ed Arti, Sér. 6 6: 410 (1888).

NotesRoussoella sensu stricto is characterized by uni- to multi-loculate ascostromata, immersed in a clypeus, visible as raised, black dome-shaped or elongate linear on host surface, bitunicate, cylindrical to subcylindrical asci, with brown, 2-celled ornamented ascospores and cytoplea-like asexual morph. The genus mainly occurs on bamboo and palms (Liu et al. 2014, Dai et al. 2017, Thambugala et al. 2017b, Jiang et al. 2019). Roussoella-like is polyphyletic, many genera were established to accommodate Roussoella sensu lato such as Neoroussoella, Pararoussoella and Pseudoroussoella (Liu et al. 2014, Wanasinghe et al. 2018c, Mapook et al. 2020). There are 43 species epithets of Roussoella in Species Fungorum (2020). However, some other species were synonymized under Neoroussoella, Pararoussoella and Pseudoroussoella in Roussoellaceae as well as transferring to other families based on multi-gene phylogeny coupled with morphology (Jaklitsch & Voglmayr 2016, Crous et al. 2019b, Jayasiri et al. 2019, Phukhamsakda et al. 2020).