Abstract
During a survey of hyphomycetes from karst areas in Thailand, four stachybotrys-like taxa, viz., Cymostachys garethjonesii sp. nov., Memnoniella oblongispora sp. nov., M. nilagirica comb. nov. and Stachybotrys microspora were identified and are provided with descriptions in this paper. The new species are introduced based on morphological and molecular differences and compared with similar or related taxa. Memnoniella nilagirica and Stachybotrys microspora are new records for Thailand. An annotated checklist of stachybotrys-like taxa in Thailand is provided based on previous publications and database searches.