Marasmioid and gymnopoid fungi of the Republic of Korea. 6. Marasmius sect. Marasmius

• The paper is a next continuation of a papers series dealing with the genus Marasmius.
• The taxonomic position of taxa based on morphology is confirmed using ITS and LSU.
• One species, M. wisteriae is described as a new one for ascience.
• M. bulliardii, M. rotalis, M. tubulatus, M. ruforotula are new records in Korea.
• A key to the species identification is published.

Species of Marasmius sect. Marasmius (subsect. Marasmius and Sicciformes) collected in South Korea were studied. The detailed morphological descriptions with figures for five species and a key for the identification are provided. Marasmius wisteriae is described as a new species, and M. bulliardii, M. rotalis, M. tubulatus (all in the subsect. Marasmius), and M. ruforotula (subsect. Sicciformes) are newly recorded in Korea. Their taxonomic position was confirmed by the phylogeny based on the internal transcribed spacer (ITS) and nuclear large ribosomal subunit (LSU) rRNA genes.