Chaetothyriomycetidae is a subclass of fungi within the Eurotiomycetes. They are collectively termed the black yeasts. The subclass was revised in 2014.
References
Geiser DM, Gueidan C, Miadlikowska J, Lutzoni F, Kauff F, Hofstetter V, Fraker E, Schoch CL, Tibell L, Untereiner WA, Aptroot A, 2006. Eurotiomycetes: Eurotiomycetidae and Chaetothyriomycetidae. Mycologia 98, 1053–1064.