Phaeodimeriellaceae Boonmee, Mapook & K.D. Hyde, in Boonmee et al., Mycosphere 8(10): 1748 (2017).

MycoBank number: MB 553833; Index Fungorum number: IF 553833; Facesoffungi number: FoF 03689, 27 species.

Epiphytic on living leaves, or associated with other fungi on leaves. Sexual morph: Ascomata superficial, solitary or scattered, coriaceous, globose to subglobose, dark brown, surrounded by brown to dark brown mycelium at the base, apical ostiole, with hook-like and dark brown setae. Peridium brown to dark brown cells of textura angularis. Hamathecium comprising cylindrical to filiform, branched, septate, cellular pseudoparaphyses. Asci 8-spored, bitunicate, oval to ellipsoidal, apex rounded, short pedicellate, with a small ocular chamber. Ascospores 2–3-seriate, oblong to broadly fusiform, hyaline when immature and pale brown to brown at maturity, 1-septate, with a mucilaginous sheath. Asexual morph: Coelomycetous. Conidiomata pycnidial, superficial, globose to subglobose. Conidiomatal setae long, hook-like, aseptate, dark brown, with blunt apex. Peridium comprises brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells enteroblastic, monophialidic. Conidia fusiform, hyaline, aseptate, guttulate (adapted from Boonmee et al. 2017).

Type: Phaeodimeriella Speg.

Notes: Mapook et al. (2016a) provided sequence data for Phaeodimeriella cissampeli and P. dilleniae, and indicated that both species clustered in a distinct clade within Dothideomycetes. Although, Mapook et al. (2016a) treated Phaeodimeriella as a genus in Pseudoperisporiaceae, Boonmee et al. (2017) excluded this genus and placed it in Phaeodimeriellaceae.