Phylogenetic placement of a new species of Corynesporopsis from dead acacia wood indicates occurrence of tretic conidiogenesis within Xylariales

A new species of Corynesporopsis from rotting wood of Acacia confusa differs from similar species with one-septate conidia by comparatively short conidiophores and conidia and deeper brown pigmentation of conidiogenous cells than of more proximal cells of the conidiophore. Morphology in culture differs from that in situ mainly by hyaline vegetative hyphae and branched conidiophores. A phylogenetic analysis including a species of Corynesporopsis indicates a close relationship to Xylariales and the occurrence of tretic conidiogenesis in this order. Corynesporopsis quercicola is a new record for Taiwan.