Chaetothyriaceae Hansf. ex M.E. Barr, Mycologia 71(5): 943 (1979)

MycoBank number: MB 80584; Index Fungorum number: IF 80584Facesoffungi number: FoF 10323;

Epiphytic or saprobic on leaves and stems of various plants in terrestrial habitats. Sexual morph: Ascomata superficial, immersed to erumpent through cracking or splitting of the host tissue, solitary to gregarious, with periphysate ostioles, with or without papilla. Wall of ascoma composed of several layers, outer layers of dark brown cells, inner layers of hyaline to light brown flattened cells. Hamathecium lacking or comprising filiform, hyaline, septate paraphyses. Asci 4−8-spored, bitunicate, fissitunicate, oblong, clavate to nearly cylindrical, oval, sessile or shortly pedicellate, with or without an ocular chamber, forming in a basal layer, often interspersed with and covered by cellular remnants of interthecial tissues. Ascospores overlapping 1-multi-seriate, irregularly arranged, ellipsoid to broadly obovoid, fusiform to cylindrical, hyaline or lightly pigmented, yellowish to brownish, aseptate or 1−2-trans-septate, or muriform, thin-walled, with or without a gelatinous sheath or appendages, guttulate or eguttulate. Asexual morph: Coelomycetous and hyphomycetous.

Type: Chaetothyrium Speg.