Cyclodothis Syd. & P. Syd., in Sydow & Sydow, Annls mycol. 11(3): 266 (1913).
Index Fungorum number: IF 1371; Facesoffungi number: FoF 08597, 2 morphological species (Species Fungorum 2021), molecular data unavailable.
Pathogenic on host. Sexual morph: Stromata erumpent through the epidermis, characteristically annular, with numerous densely arranged small perithecioid loculi, wall distinct, dark brown, composed of small cells, ostiolate. Asci clavate, 8-spored, ascospores 3- to 4-stichous, indistinctly paraphysate. Ascospores oblong cylindrical, colorless, straight, slightly inequilateral, ends obtuse, with a single medial septum. Asexual morph: Unknown (Adapted from Sydow and sydow 1913).
Type species: Cyclodothis pulchella Syd. & P. Syd.
Notes: Cyclodothis was introduced by Sydow and Sydow (1913) with C. pulchella as type species. Cyclodothis is characterized by small perithecioid loculi, clavate asci, oblong cylindrical ascospores. Cyclodothis has been treated as a synonym of Mycosphaerella for several years. Aptroot (2006) observed the type specimen and reported that it only contains a coelomycete. The placement of Cyclodothis is uncertain and is currently treated as a doubtful genus in Mycosphaerellaceae.