Cercoseptoria Petr., Annls mycol. 23(1/2): 69 (1925).
Index Fungorum number: IF 7543; Facesoffungi number: FoF 09185, 15 morphological species (Species Fungorum 2021), molecular data unavailable.
Pathogenic on host. Asexual morph: Spots circular, definite, small 1–4 mm in diameter; centers pale to ashen; borders red. Sporodochia amphigenous, top-shaped, arising deep within the leaf tissue and erumpent, dark, about 45 μm broad at the top and of slightly greater height from base to top. Conidia resembles those of Septoria measuring about 35 μm long, 2 μm thick. Sexual morph: Unknown (Adapted from Stevens and Dalbey 1919).
Type species: Cercoseptoria chamaesyces (F. Stevens & Dalbey) Petr.
Notes: Cercoseptoria was introduced by Petrak (1925) with C. chamaesyces as type species. Cercoseptoria is characterized by amphigenous sporodochia producing Septoria like conidia. Videira et al. (2017) treated Cercoseptoria as a synonym of Pseudocercospora, but this treatment has not been confirmed with DNA data. Molecular data of the genus is lacking and we consider Cercoseptoria as a doubtful genus in Mycosphaerellaceae.