A contribution to the study of the lichen biota of Iturup Island (Kuril Islands, Sakhalin Region, Russian Far East)

This paper presents a list of 61 lichen species and one lichenicolous fungus collected in 2022 on Iturup I. Twenty-eight of these are new to the island. Among them Cetrelia monachorum and Ramalina litoralis are new to the Sakhalin Region, Mycobilimbia carneoalbida is new to the Kuril Islands, and four species (Cladonia deformis, Lecanora argopholis, Plectocarpon linitae, and Pseudephebe minuscula) are recorded for the first time on the Southern Kurils. New localities of three species (Bryocaulon pseudosatoanum, Cladonia vulcanii, and Lobaria pulmonaria) listed in the Red Data Book of Russia and the Red Data Book of the Sakhalin Region have been found. For all species, the coordinates of the collection points, substrates, communities, and information on the distribution of the species in the Kurils and the neighboring regions are provided.