A new species of Chaetochalara on decaying leaves from Brazil

Chaetochalara mutabilis sp. nov., found on decaying needle-like leaves of Araucaria angustifolia and leaves of Calophyllum brasiliense, is described and illustrated. The new species is characterized by erect septate dark brown setae (most of which develop into distinct single dark brown conidiophores) and cylindrical 1-septate hyaline conidia. A key to Chaetochalara species is also provided.