Phaeosphaeria I. Miyake, Bot. Mag., Tokyo 23: 93 (1909).

MycoBank number: MB 3951; Index Fungorum number: IF 3951; Facesoffungi number: FoF 00233; 210 morphological species (171 species as Phaeosphaeria, 39 species as Phaeoseptoria; Species Fungorum 2020), 19 species with molecular data.

= Phaeoseptoria Speg., Revta Mus. La Plata 15(2): 39 (1908).

Type speciesPhaeosphaeria oryzae I. Miyake, Bot. Mag., Tokyo 23: 93 (1909).

Notes – Members of Phaeosphaeria are found as saprobes, endophytes or pathogens on various hosts worldwide, especially on monocotyledonous plants (Farr & Rossman 2020). Morphologically, Shoemaker & Babcock (1989b) divided the genus into six subgenera based on differences in ascospore morphology. Recent phylogenetic analysis has shown that Phaeosphaeria is polyphyletic and many Phaeosphaeria sensu lato were treated in different genera in Phaeosphaeriaceae such as Amarenomyces, Juncaceicola, Loratospora, Neosetophoma, Parastagonospora, Phaeopoacea, Pseudophaeosphaeria, Septoriella, as well as in other families in Pleosporales (Quaedvlieg et al. 2013, Ariyawansa et al. 2014d, 2015a, Tanaka et al. 2015a, Hyde et al. 2016, 2017, 2020b, Tennakoon et al. 2016, Thambugala et al. 2017b, Marin-Felix et al. 2019). Quaedvlieg et al. (2013) designated the epitype of Phaeosphaeria oryzae (Material examined – Korea, on leaf of Oryza sativa (Poaceae), collected at Port San Francisco, CA, 29 December 1997, coll. L. Hausch, det. M.E. Palm, BPI 744438, culture ex-epitype CBS 110110 (MBT175330) and synonymized Phaeoseptoria papayae as asexual morph of Phaeosphaeria which is characterized by septoria-like coelomycetous, forming hyaline to brown, cylindrical to subcylindrical conidia (Quaedvlieg et al. 2013, Phookamsak et al. 2014c, Hyde et al. 2017). However, some Phaeosphaeria species also formed coelomycetous asexual morph, with light brown, subglobose to ellipsoidal, or oblong to subcylindrical, (0–)1–2-septate conidia (Crous et al. 2014b, Jayasiri et al. 2019, Phookamsak et al. 2019).