A new species of Dactylosporina (Physalacriaceae, Agaricales) from Japan

• Several specimens of the genus Dactylosporina were found in Japanese herbariums.
• New species Dactylosporina brunneomarginata was described and illustrated.
• This species has pileo-, caulo-, and cheilocystidia filled with oily content.
• It differs from previously described similar species in macro- and microscopically.
• This is the first report on Dactylosporina from Asia.

Dactylosporina brunneomarginata sp. nov., belonging to the family Physalacriaceae (Agaricales) is described and illustrated. This fungus differs from previously described species of Dactylosporina macroscopically by its viscid pileus and stipe surface when wet, the lamellae with dark brown edges, and microscopically by its gloeocystidioid pileo-, cheilo-, and caulocystidia with olive to yellow-brown oily content. This is the first report on Dactylosporina from Asia.