As a result of lichenological exploration of the Erzi Nature Reserve in the Republic of Ingushetia, North Caucasus, Russia, we report 266 species of lichenized fungi, 13 of lichenicolous fungi and seven of non-lichenized saprophytic fungi, representing 115 genera. Twenty-three species are recorded for the first time for North Caucasus, of which 16 are new for the Caucasus and ten are new for Russia (Arthonia protoparmeliopseos, Aspicilia viridescens, Buellia abstracta, Lecidella viridans, Micarea soralifera, Rinodina straussii, R. tunicata, R. zwackhiana, Schizoxylon alboatrum and Verrucaria fuscoatroides). Of the 16 species new for the Caucasus, seven are recorded for the first time for Asia (Buellia abstracta, Micarea nigella, M. soralifera, Ramonia chrysophaea, Rinodina tunicata, Schizoxylon alboatrum and Verrucaria elevata). In addition, two taxa listed in the Red Data Book of Russia are recorded: Leptogium burnetiae and Usnea florida.
Version of record first published online on 9 November 2017 ahead of inclusion in December 2017 issue.