Potemkin, A.D., Yu.S. Mamontov, E.V. Sofronova & O.I. Kuznetsova. Mesoptychia igiana (S.Hatt.) L.Söderstr. et Váňa (Jungermanniaceae, Marchantiophyta) in Russia
Arctoa (2015) 24: 489-496
Mesoptychia igiana was recorded for the first time for Russia from Republic of Buryatia from South Muya Range of Stanovoye Nagor‘e Uplans, and from Kropotkin Range of East Sayan Mts., on the basis of comparison with protologue and the holotype. This species has been previously known from southern Japan and China only. The species has coarsely and densely papillose cuticle, with strongly protruding hemisphaerical papillae that are not characteristic of the other species of the genus. Description and illustrations of Russian plants, their ecology, differentiation from the other species of the genus and, particularly, from M. kateninii (Schljakov) Potemkin, Mamontov & Sofronova, comb. nov., and distinctions from the holotype are provided. Molecular comparison of rbcL sequences of Siberian specimens of M. igiana has shown their isolated position from the other Mesoptychia species sequences presently deposited in GenBank.