Mycosphaerellales » Mycosphaerellaceae


Devonomyces Videira & Crous, in Videira et al., Stud. Mycol. 87: 353 (2017).

Index Fungorum number: IF 822695; Facesoffungi number: FoF 08493, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Pathogenic, foliicolous. Sexual morph: Ascomata pseudothecial, amphigenous, subepidermal, becoming erumpent, subglobose to globose, with apical, papillate ostiole; walls of 2–3 layers of medium brown textura angularis, subhymenium of 1–2 layers of hyaline cells. Asci 8-spored, fasciculate, bitunicate, cylindrical to narrowly obovoid, straight or slightly incurved. Ascospores bi- to triseriate, overlapping, hyaline, guttulate, thin-walled, straight, fusoid-ellipsoidal with obtuse ends, medianly uniseptate. Mycelium internal, consisting of septate, branched, hyaline to brown, smooth to verruculose hyphae. Asexual morph: Caespituli sporodochial, situated on a brown stroma consisting of verruculose, brown, globose cells and hyphal elements. Conidiophores rarely pigmented and verruculose in lower part, mostly hyaline and smooth throughout, thick-walled, cylindrical, straight to irregularly curved, septate. Conidiogenous cells terminal, hyaline, smooth, unbranched, straight or slightly curved, proliferating sympodially. Conidia solitary, hyaline, smooth, narrowly obclavate, septate, irregularly curved, rarely straight, apex obtuse, base long obconic-truncate, lateral branches common, secondary conidia forming on most mature primary conidia; conidia aggregated in slimy masses (adapted from Videira et al. 2017).


Type species: Devonomyces endophyticus (Crous & H. Sm. ter) Videira & Crous


Notes: Devonomyces is characterised by pseudothecial, amphigenous ascomata, fasciculate, bitunicate, cylindrical to narrowly obovoid asci and overlapping, hyaline, guttulateuniseptate ascospores. Devonomyces has a pseudocercosporella-like morph but not congeneric with the type of pseudocercosporella. Devonomyces is a distinct and well-supported genus in Mycosphaerellaceae. Molecular markers available for Devonomyces are ITS, LSU, SSU, Actin, BTUB, Calmodulin, RPB2 and TEF-1.


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