Chaetothyrina Theiss., Annls mycol. 11(6): 495 (1913).

MycoBank number: MB 976; Index Fungorum number: IF 976; Facesoffungi number: FoF 06974; 15 morphological species (Species Fungorum 2020), 4 species with molecular data.

Type speciesChaetothyrina musarum (Speg.) Theiss., Annls mycol. 11(6): 495 (1913).

Chaetothyrium musarum Speg., Anal. Mus. nac. Hist. nat. B. Aires 6: 297 (1898).

Notes – This genus causes flyspeck disease on various plants and fruits. Chaetothyrina was placed in Micropeltidaceae based on its flattened thyriothecium, with interwoven cells (Wu et al. 2011, Hongsanan et al. 2017). Chaetothyrina however, differs from other genera in Micropeltidaceae in having inconspicuous superficial hyphae (sometimes this may be absent), dark brown thyriothecia with setae, and 1-septate ascospores (Reynolds & Gilbert 2005, Singtripop et al. 2016, Hongsanan et al. 2017); Micropeltidaceae species have bluish or greenish to black thyriothecia, with multi-septate ascospores (Wu et al. 2011, Hongsanan et al. 2015a). Phylogenetically, Chaetothyrina clusters within the new family Phaeothecoidiellaceae, Capnodiales (Hongsanan et al. 2017).