The Chaetosphaeriaceae are a family of fungi in the Ascomycota, class Sordariomycetes. The family was circumscribed by Martina Réblová, Margaret Elizabeth Barr Bigelow, and Gary Samuels in 1999. Species in the family have a cosmopolitan distribution, and are found in both temperate and tropical climates. Fossils of the Chaetosphaeriaceae are known from the Carboniferous, Eocene, Oligocene, Miocene and more recent sediments.

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