Kucera J. 1, Ignatova E.A. 2, Ignatov M.S. 2,3, Fedorova A.V. 3, Kuznetsova O.I. 3, Fedosov V.E. 2,4 2021. Rauiella thuidioides, sp. nov. (Leskeaceae, Musci), a new species from the Russian Far East // Arctoa. Vol. 30: 425–433 [in English].

1 – Faculty of Science, Department of Botany, University of South Bohemia, České Budějovice, Czech Republic; e-mail: kucera@prf.jcu.cz. ORCID (JK) 0000-0002-0230-5997

2 – Lomonosov Moscow State University, Biological Faculty, Geobotany Dept., Leninskie Gory Str. 1-12, Moscow 119991 Russia; e-mail: arctoa@list.ru. ORCID (EI) 0000-0001-6287-5660

3 – Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya Str., 4, Moscow 127276 Russia; e-mails: misha_ignatov@list.ru; oikuznets@gmail.com; alina_77777@mail.ru. Orcid (MI) 0000-0001-6096-6315, (OK) 0000-0002-5513-1329, (AF) 0000-0001-7362-2124.

4 – Botanical Garden-Institute, FEB RAS, Makovskogo Street, 142, Vladivostok, 690024, Russia; e-mail: fedosov_v@mail.ru. ORCID (VF) 0000-0002-5331-6346

KEYWORDS: Hypnales, molecular barcoding, cryptic diversity

ABSTRACT. Molecular barcoding of a morphologically unfamiliar thuidiaceous moss, known so far from two specimens collected in the Sikhote-Alin mountain range suggested the affinity with the genus Rauiella. Subsequent evaluation in a broader phylogenetic context of Leskeaceae s.lat. using nuclear ribosomal ITS and chloroplast trnF-trnS region confirmed that the plants which morphologically substantially differ from known representatives of Rauiella are molecularly likewise distinctive. It is therefore described and illustrated here as a new species, Rauiella thuidioides. We further discuss the morphological differences from its congeners and other similar taxa, as well as its ecology and geographical affinities. Finally, we also touch the delimitation of the genus Rauiella and advocate the synonymy of Thuidiaceae with Leskeaceae.

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Doi 10.15298/arctoa.30.28