Ajellomycetaceae Arachnomycetaceae Arthrodermataceae Ascosphaeraceae Gymnoascaceae Onygenaceae Eremascaceae The Onygenales are an order of fungi in the class Eurotiomycetes and division Ascomycota.

The order's last common ancestor is estimated to have lived 150 million years ago.

[1] Onygenales can consume and break down keratin, the main component of the outer layer of skin.

Many are dimorphic, and can change from mold to yeast form depending on their environment.

The Onygenales are important as emerging human pathogens because of the rising rates of immunosuppression due to live-organ transplant, HIV/AIDS, and autoimmune disorders such as lupus erythematosus.