Phaeothyriolum Syd., Annls mycol. 36(4): 305 (1938).
= Murramarangomyces Crous, in Crous et al., Persoonia 39: 385 (2017).
MycoBank number: MB 3962; Index Fungorum number: IF 3962; Facesoffungi number: FoF 08089; 7 morphological species (Species Fungorum 2020), 4 species with molecular data.
Type species: Phaeothyriolum eucalyptinum Syd.
Notes: Phaeothyriolum was placed in genera incertae sedis in Dothideomycetes in Wijayawardene et al. (2017a). Sequence data of the type species is unavailable. Murramarangomyces based on a single species M. corymbiae was found to be aexual morph of Phaeothyriolum corymbiae. Thus, Murramarangomyces was synonymized under Phaeothyriolum (Crous et al. 2019c). Crous et al. (2019c) indicated that four species of Phaeothyriolum clustered together within Dothideomycetes, but its placement was not assigned. We were unable to obtain a fresh collection of species in this family, so a drawing is provided (Fig. 55)
Fig. 55 Phaeothyriolum corymbiae (redrawn from Crous et al. 2017, CBS H-23281, holotype). a Mycelium becoming fertile conidiogenous cells. b, c Conidigenous cell aggregated in cauliflower-like form. d Conidia