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Umbilicaria orientalis – a new species of Umbilicaria subg. Papillophora with an East Asian distribution: morphological delimitation and molecular evidence

Published online by Cambridge University Press:  11 November 2020

Evgeny A. Davydov*
Altai State University – Herbarium (ALTB), Lenin Prosp. 61, Barnaul656049, Russian Federation
Lidia S. Yakovchenko
Federal Scientific Center of the East Asia Terrestrial Biodiversity FEB RAS, Russian Academy of Sciences Far Eastern Branch, Vladivostok, Russian Federation
Irina Urbanavichene
Komarov Botanical Institute RAS, Laboratory of Lichenology and Bryology, Prof. Popov Str. 2, St. Petersburg197376, Russian Federation
Liudmila Konoreva
Komarov Botanical Institute RAS, Laboratory of Lichenology and Bryology, Prof. Popov Str. 2, St. Petersburg197376, Russian Federation Botanical Garden Institute FEB RAS, Vladivostok, Russian Federation Polar-Alpine Botanical Garden and Institute, Kirovsk184256, Russian Federation
Sergey Chesnokov
Komarov Botanical Institute RAS, Laboratory of Lichenology and Bryology, Prof. Popov Str. 2, St. Petersburg197376, Russian Federation Botanical Garden Institute FEB RAS, Vladivostok, Russian Federation
Tatiana Kharpukhaeva
Institute of General and Experimental Biology, Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy Str. 6, Ulan-Ude, Russian Federation
Walter Obermayer
Insitute of Biology, University of Graz, Universitätspl. 3, 8010Graz, Austria
Author for correspondence: Evgeny A. Davydov. E-mail:


Umbilicaria orientalis Davydov sp. nov. is described and phylogenetic analysis (ITS, mtLSU and RPB2) confirmed its distinctness and indicated a sister relationship with U. trabeculata within the U. vellea group. The species is morphologically similar to U. vellea but differs by simple, cylindrical or strap-like rhizinomorphs and by thalloconidia, developing both on the lower surface and on rhizinomorphs, that are 1–2 (rarely 4)–celled or in aggregates of up to 5–6 cells. Umbilicaria orientalis is described from the Russian Far East and is currently known from a wide range of localities in East Asia, from the Far East to South Siberia and Mongolia in the north, to Hebei and Tibet in the south. New sequences of U. americana were obtained; the species represents an independent phylogenetic lineage within Umbilicaria subg. Papillophora. Diagnostic traits and variability of different developmental stages of U. orientalis, as well as its East Asian distribution pattern, are discussed.

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Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of the British Lichen Society

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