Ignatova, E.A., L.E. Kurbatova, O.I. Kuznetsova, O.V. Ivanov, J.R. Shevock, B. Carter & M.S. Ignatov. The genus Scouleria (Bryophyta) in Russia
revisited
Arctoa (2015) 24: 47-66
doi: 10.15298/arctoa.24.09
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.