Induratiaceae Samarak., Thongbai, K.D. Hyde & M. Stadler, Fungal Divers. (in press)

MycoBank number: MB 833443; Index Fungorum number: IF 833443; Facesoffungi number: FoF 06905; 29 species.

Saprobic on dead wood, leaves, endophytic on leaves, stems and barks. Sexual morph: Stromata scattered, solitary or rarely pair-wise, globose to subglobose, barely raised above the host surface, visible as light brown-black, carbonaceous spots, immersed to semi-immersed in host tissue, attached to substrate with a broad base, with a single ascomata per stroma. Clypeus black, thick-walled, short, comprising dark fungal hyphae and host epidermal cells. Ostiole papillate, centric. Peridium wide at base, composed of two layers; inner layer hyline, thin walled cells of textura angularis; outer layer yellowish brown, thick walled cells of textura angularis. Paraphyses hyaline, smooth, thin-walled, two types; type 1 branched, with short, lateral bridges, aseptate, type 2 infrequently branched, septate. Asci 8-spored, unitunicate, cylindrical, short pedicellate, apically rounded with a J+, apical ring. Ascospores uniseriate, naviculate to ellipsoidal or long fusiform, mostly hyaline, smooth-walled, constricted apiosporous; apical cell conical shape, guttulate with remnant at the top; base cell rarely brown, guttulate with remnant at the base, produce germ tube during the spore germination. Culture charcateristics: White to pale orange, straight, right angle hyphae, wavy or cottony hyphal growth, rope-like with cauliflower- like hyphal bodies, strong odour. Asexual morph: Conidiophores nodulisporium-like (Induratia), abundant, and irregularly branched in the upper part. Conidiogenous cells terminal, solitary or sometimes two celled at the ends of branches, cylindrical, pale brown, bearing inconspicuous denticles. Conidia narrowly ellipsoidal to subglobose, hyaline, smooth, with a flat, wide, basal scar. idriella-like (Emarcea) (Samarakoon et al. 2019b).

Type genusInduratia Samuels, E. Müll. & Petrini

Notes – Samarakoon et al. (2020) introduced Induratiaceae to accommodate genera Emarcea and Induratia (= Muscodor) with apiosporous ascospores. Two novel species collected from northern Thailand revealed their phylogenetic affinity to earlier described Muscodor, Emarcea species and one Induratia sp. SMH 2155. Based on morphology, ITS-LSU-rpb2tub2 phylogeny and gas chromatography coupled with mass spectrometry (GC-MS), Induratiaceae was established in Xylariales (Samarakoon et al. 2020).