Trichosphaeria was established by Fuckel (1870) with the type species T. pilosa collected from rotten wood from Germany. Trichosphaeria species are characterized by globose to subglobose ascomata with setae, unitunicate, 4–8-spored asci with a J-, apical ring, and hyaline, aseptate, ellipsoidal ascospores. Since most Trichosphaeria species were introduced before 1940, molecular data are lacking in this genus. The genus needs recollection and study.