Bezgodov A.G.1, Fedorova A.V.2, Fedosov V.E.3,4, Pisarenko O.Yu.5, Spirina U.N.2,6, Ignatov M.S.2,3, Ignatova E.A.3 2026. Crossidium crassinervium (pottiaceae, bryophyta), a new species for Russia // Arctoa. Vol. 35: 40-46 [in English].
1 – Joint Stock Company Kama Research Institute on Complex Deep and Superdeep Borehole Investigations, Krasnoflotskaya str., 15, Perm, 614016, Russia. E-mail: bezgodovs@list.ru. ORCID: 0000-0002-7916-4467
2 – Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya Str., 4, Moscow, 127276, Russia. E-mails: alina_77777@mail.ru; misha_ignatov@list.ru. ORCID: (AF) 0000-0001-6096-6315; (MI) 0000-0001-6096-6315
3 – Lomonosov Moscow State University, Faculty of Biology, Plant Ecology and Geography Dept., Leninskie Gory Str. 1–12, Moscow, 119234, Russia. E-mails: fedosov_v@mail.ru; arctoa@list.ru. ORCID: (VF) 0000-0002-5331-6346; (EI) 0000-0001-6287-5660
4 – Botanical Garden-Institute, Far Eastern Branch of the Russian Academy of Sciences, Makovskogo Street, 142, Vladivostok, 690024, Russia
5 – Central Siberian Botanical Garden, Zolotodolinskaya 101, Novosibirsk 630090 Russia. E-mail: o_pisarenko@mail.ru. ORCID: 0000-0003-4108-4821
6 – Faculty of Biology, Tver State University, Zhelyabova 33, Tver, 170100, Russia. ORCID: 0000-0001-7010-5041
KEYWORDS: mosses, new record, nrITS
ABSTRACT. Crossidium crassinervium is a xeric species occurring in South Europe, North Africa, Middle East, Caucasus, countries of Central Asia (Tadjikstan and Turkmenistan), China, southern states of U.S.A., and Mexico. Here we report the first findings of C. crassinervium in Russia. It was collected in southern Siberia, in Khakassia, in the upper course of the Yenissey River and in Buryatia, East Sayan Mountains. The ITS sequences confirm the closest affinity of Siberian specimens to C. crassinervium, though they differ from those of European plants in a number of substitutions and indels comparable with the differences between European C. crassineurum and C. aberrans.
doi: 10.15298/arctoa.35.04