Abstract
Fungicolous fungi are able to grow on both cultivable and wild mushrooms as saprotrophs, mycoparasites or symbionts. These taxa are capable of causing deformations or decomposition of mushrooms and can also be potential pathogens on cultivable mushrooms, thereby causing both yield and quality losses. Therefore, accurate identification and investigation of taxonomic diversity of the fungicolous taxa associated with mushrooms would be beneficial for disease management strategies and quarantine purposes in the mushroom industry. During a cultivation trial to grow Phlebopus spongiosus on soil, the mushrooms were contaminated with an Aspergillus species. Multi-locus phylogeny based on combined ITS, tub2, cam and rpb2 sequence data and morphological characters revealed the fungicolous contaminant to be A. quadrilineatus. Herein A. quadrilineatus is described with complete descriptions, illustration and a phylogenetic tree of Aspergillus section Nidulantes to show its placement. This study is the first report of A. quadrilineatus as a fungicolous species on Phlebopus spongiosus.
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