Thyridariaceae
Chromolaenomyces Mapook & K.D. Hyde, in Mapook et al., Fungal Diversity 101: 96 (2020).
Index Fungorum number: IF 557333; Facesoffungi number: FoF 07824, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on decaying wood. Sexual morph: Ascomata hysterothecial, superficial or sunken in substrate, oval to elongate, or globose to subglobose, dark brown to black, carbonaceous, glabrous, straight or curved, with a subiculum, with brown hyphae. Ostiole slit-like, with a small to large, flat, crest-like apex. Peridium thick at the sides, broad at the apex and thinner at the base, dark brown, comprising a single stratum of dark brown cells of textura angularis in the inside and thin-walled cells of textura prismatica in the exterior part. Hamathecium comprising cylindrical to filiform pseudoparaphyses in a gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, elongate cylindric-clavate, straight or slightly curved, short-pedicellate, apically rounded, with an ocular chamber. Ascospores overlapping bi-seriate, narrowly fusiform to broadly cylindrical, straight or slightly curved, 1–3-septate, hyaline to pale brown, smooth, surrounded by a narrow appendage like sheath. Asexual morph: Unknown (adapted from Mapook et al. 2020).
Type species: Chromolaenomyces appendiculatus Mapook & K.D. Hyde
Notes: Chromolaenomyces is characterised by hysterothecial, superficial ascomata, elongate cylindric-clavate, straight or slightly curved asci and narrowly fusiform to broadly cylindrical ascospores. Chromolaenomyces is phylogenetically closely related to Thyridariella (Mapook et al. 2020). Chromolaenomyces differs from Thyridariella in having elongate cylindric-clavate asci with a short pedicel and ascospores that are biseriate, arranged irregularly, narrowly fusiform to broadly cylindrical, 1–3-septate with a narrow appendage like sheath, Thyridariella has clavate asci with a moderately long pedicel and ascospores that are uniseriately to biseriately arranged, fusiform to ellipsoidal, and muriform with a gelatinous sheath (Devadatha et al. 2018, Mapook et al. 2020). Chromolaenomyces is morphologically and phylogenetically a distinct genus in Thyridariaceae. Molecular markers available for Chromolaenomyces include ITS, LSU, SSU, TEF-1 and RPB2.
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