Five new records of Agaricus (Agaricaceae, Basidiomycota) in island regions of Korea

During a mycological field survey in 2021, 45 specimens of the genus Agaricus belonging to different species were collected from four islands in Korea. Based on phylogenetics in conjunction with the morphological examination, five species (Agaricus amoenomyces, Agaricus macropeplus, Agaricus pseudopallens, Agaricus rubripes, and Agaricus tytthocarpus) were reported for the first time from Korea. This study presents morphological descriptions, color photographs, and phylogenetic analyses of these species.