Phoma Sacc., Michelia 2 (6): 4 (1880).

MycoBank number: MB 4014; Index Fungorum number: IF 4014; Facesoffungi number: FoF 08229; 2218 morphological species (Species Fungorum 2020), 2 species with molecular data.

Type speciesPhoma herbarum Westend., Bull. Acad. Roy. Sci. Belgique, Cl. Sci. 19: 118 (1852).

Notes – When Aveskamp et al. (2010) refined Didymellaceae, they included phomoid taxa that could not be placed in other sections or genera due to the lack or presence of typical sectional characters. They synonymised fifteen species under this genus. However, Chen et al. (2015) assigned characters of sexual morph (Atradidymella) of Phoma herbarum as the type species of this genus. Species belonging to this genus develop fusiform, one septate ascospores and oblong to cylindrical, ellipsoidal, sometimes fusiform aseptate conidia. There are 3292 records in Index Fungorum (2020) and 2818 associated records in Mycobank (2020). However, most of those names are synonymised under several other genera in Didymellaceae, some are assigned to different families and finally, there are only two species accepted under Phoma (Chen et al. 2015, 2017, Valenzuela-Lopez et al. 2018).