Deightonomyces Videira & Crous, in Videira et al., Stud. Mycol. 87: 347 (2017).
Index Fungorum number: IF 822586; Facesoffungi number: FoF 08492, 1 morphological species (Species Fungorum 2021), 1 species with molecular data.
Saprobic on bark. Sexual morph: Unknown. Asexual morph: Mycelium immersed, hyphae pigmented. Stromata immersed, composed of brown, thick-walled hyphal cells. Conidiophores in dense fascicles, arising from stromata, olivaceous brown, smooth, simple, straight, sub cylindrical, slightly geniculate-sinuous. Conidiogenous cells terminal, sub hyaline to pale olivaceous, smooth, proliferating sympodially, conidiogenous loci conspicuous, slightly thickened and darkened. Conidia solitary, ellipsoid-ovoid, obclavate-fusiform, sub cylindrical, aseptate or septate, sub hyaline to pale olivaceous, smooth to verruculose, apex obtuse or subacute, base obconically truncate, hila hardly thickened and somewhat darkened (Adapted from Videira et al. 2017).
Type species: Deightonomyces daleae (Ellis & Kellerm.) Videira & Crous
Notes: Deightonomyces was introduced by Videira and Crous (2017) with D. daleae as type species. Deightonomyces is characterized by immersed stromata, sub hyaline to pale olivaceous conidiogenous cells, obclavate-fusiform aseptate or septate conidia. Videira et al. (2017) mentioned that the strain of P. daleae used in their phylogenetic analyses formed a single lineage and was not a true Passalora species both morphologically and phylogenetically. Deightonomyces is currently treated as a distinct genus in Mycosphaerellaceae.