Ignatova E.A.1, Kurbatova L.E.2, Kuznetsova O.I.3, Ivanov O.V.4, Shevock J.R.5, Carter B.6, Ignatov M.S.3 2015. The genus Scouleria (Bryophyta) in Russia revisited // Arctoa. Vol. 24: 47–66 [in English].

1 Moscow State University, Biological Faculty, Geobotany Dept., Moscow 119234 Russia; e-mail: arctoa@list.ru

2 V.L. Komarov Botanical Institute Rus. Acad. Sci., Prof. Popov Str., 2, St. Petersburg, 197376 Russia; e-mail: korablik-l@mail.ru

3 Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276 Russia; e-mails: oikuznets@gmail.com & misha_ignatov@list.ru

4 P.N. Lebedev’ Institue of Physics of Russ. Acad. Sci., Leninsky 53, Mosсow 119991 Russia; e-mail: ivanov@td.lpi.ru

5 Department of Botany, California Academy of Sciences (CAS), 55 Music Concourse Drive, Golden Gate Park San Francisco, CA 94118 U.S.A. E-mail: jshevock@calacademy.org

6 Department of Biology, Duke University, Durham, North Carolina 27708, U.S.A.; e-mail: benjamincarter125@gmail.com

Keywords: Scouleria, aquatic mosses, Russia, taxonomy, phylogeny, phytogeography, ITS, rpl32-trnL

Abstract. Circumscription of Scouleria species in Russia is revised basing on the molecular phylogenetic analysis and morphological study. Scouleria rschewinii is found to have mainly western distribution in the lower course of Yenissey River in Krasnoyarsk Territory, Vilyui River and upper course of Lena River in Yakutia, and Vitim River in Irkutsk Province, but with few disjunct localities in Kolyma and Omoloj Rivers in NE Yakutia and Anadyr River in Chukotka. Scouleria pulcherrima is more frequent and occurs from Taimyr to Chukotka and from Baikal Lake area to the Amur River region. The traditionally used characters for differentiation of taxa are overlapping, while DNA sequence data (nuclear ITS and chloroplastic rpl32-trnL) and additional morphological characters (cell wall shining in polarized light, degree of peristome reduction, pattern of columella adjoing to operculum) appear to be fairly stable.

doi: 10.15298/arctoa.24.09

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