Dictyonella Höhn. [as ‘Dyctionella’], Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 118: 369 [95 repr.] (1909).

Index Fungorum number: IF 1531; MycoBank number: MB 1531; Facesoffungi number: FoF 12939; 7 morphological species (Species Fungorum 2023), molecular data unavailable.

Epiphytic or saprobic on leaves. Sexual morph: Ascostromata superficial, brown to black, rough, scattered, solitary on lower surface of leaf, hemispherical, pulvinate, surrounded by brown mycelial network forming plectenchymatous tissue, subiculum, multi-loculate each with single ascus and without obvious separating wall layer. Asci 8-spored, bitunicate, globose to subglobose, short pedicellate, apically rounded, with indistinct ocular chamber. Ascospores crowded, muriform, ellipsoid to oblong, hyaline when immature, becoming brown at maturity, obtuse at both ends, slightly constricted at middle septum, smooth-walled. Asexual morph: Undetermined.

Type species – Dictyonella erysiphoides (Rehm) Höhn. [as ‘erisyphoides’], Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 118: 369 [95 repr.] (1909

Notes – Dictyonella was established by Höhnel (1909a). The genus consists of seven species epithets (Index Fungorum 2018), with Dictyonella erysiphoides as the type species. Dictyonella has been subjected to few studies, and there is no recent account. In this study, we exclude Dictyonella from Saccardiaceae and place it in Myriangiales, genus incertae sedis, based on morphology in which ascostromata are pulvinate, asci are irregularly arranged in one or more layers in locules and have minute pedicels and indistinct ocular chambers. Representative species, particularly the type species, need to be recollected for molecular study to clarify their natural classification (Doilom et al. 2018).