Trichothallus F. Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 85 (1925).
MycoBank number: MB 10300; Index Fungorum number: IF 10300; Facesoffungi number: FoF 06939; 2 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species – Trichothallus hawaiiensis F. Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 85 (1925).
Notes – The genus was established in Trichopeltinaceae (= Trichopeltinaceae) by Stevens (1925) to accommodate the single species T. hawaiiensis. Petrak (1951) excluded the genus from Trichopeltaceae based on the characters of its recognized setae (“tragerartige Hyphen”) and phragmoconidia. Hughes (1965) stated that the component hyphae of Trichothallus have a parallel arrangement and do not diverge at right angles on the margins as they do in Trichopeltis reptans (Trichopeltaceae). Rossman et al. (2016) concluded that Plokamidomyces and Trichopeltheca are synonyms of Trichothallus.