Lichen species, proposed for the Red Data Book of the Republic of North Ossetia - Alania

Thirteen lichen species proposed for the Red Data Book of Republic of North Ossetia – Alania on based of the results of author's field works and analysis of literature information. Among them, seven species are included in the Red Data Book of the Russian Federation (Leptogium burnetiae, Letharia vulpina, Lobaria pulmonaria, Menegazzia terebrata, Nephromopsis laureri, Ricasolia amplissima, Usnea florida). Ten species are rare and vulnerable due to the state of populations in the Republic of North Ossetia-Alania at the current time (Bactrospora dryina, Buellia elegans, Candelariella boleana, Chaenothecopsis trassii, Gyalolechia lenae, Hypotrachyna afrorevoluta, Myelochroa aurulenta, Usnea articulata, U. cornuta, Xalocoa ocellata). Seven rarest lichen Urbanavichus G. P., Urbanavichene I. N. Lichen species, proposed for... 2021; No1: 60–71 61 species in the Republic and in the Caucasus, data on the state of populations of which are currently absent (Ephebe lanata, Lathagrium dichotomum, Pannaria conoplea, Phylliscum demangeonii, Stereocaulon pileatum, Sticta sylvatica, Usnea longissima). Information on distribution in the republic, ecology and proposed categories of the threatened are given. Most of the species (15) were proposed to be included with category 3 “Rare species”, and 9 species – with category 4 “Undefined by status”.