Proposal of a new family fam. nov. () based on phylogeny of and .

During a field survey of cultivated mushroom diseases, and , causal agents of pileus rot or white mould disease were detected, which resulted in up to 80% of yield losses. Multi-locus phylogenic analysis revealed that the fungi were affiliated in a distinct clade in . We further constructed a phylogenetic tree with broader sampling in and estimated the divergence times. The and clades were estimated to have diverged from around 129 MYA and fam. nov is herein proposed to accommodate species in this clade. Two new genera, i.e. and were introduced based on morphological characteristics and phylogenic relationships of longispora and , respectively. Five new combinations - , and - were proposed.