Chaetothyriothecium Hongsanan & K.D. Hyde, Phytotaxa 161(2): 161 (2014).
MycoBank number: MB 804964; Index Fungorum number: IF 804964; Facesoffungi number: FoF 06751; 1 morphological species (Species Fungorum 2020), 1 species with molecular data.
Type species: Chaetothyriothecium elegans Hongsanan & K.D. Hyde, Phytotaxa 161(2): 161 (2014).
Notes: Chaetothyriothecium was introduced with a single species C. elegans, which typically has radial setae growing around a central ostiole. Based on the flattened thyriothecia with cells in a radial arrangement and phylogenetic analyses, Chaetothyriothecium is accommodated in Microthyriaceae. Sequence data of LSU is available for the genus.