Ignatova E.A.1, Fedorova A.V.2, Ignatov M.S.1,2 2020. On the genera Isopterygiopsis and Isopterygiella, gen. nov. (Plagiotheciaceae) in Russia // Arctoa. Vol. 29: 49–62 [in English].
1 – Lomonosov Moscow State University, Faculty of Biology, Plant Ecology and Geography Dept., Leninskie Gory 1-12, Moscow 119234 Russia. E-mails: misha_ignatov @list.ru; email@example.com
2 – Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya Str., 4, Moscow 127276 Russia. E-mail: firstname.lastname@example.org
Keywords: mosses, ITS, trnL-F, new genus, new combination
ABSTRACT. The results of molecular phylogenetic analysis and morphological characters suggest that Asian plants previously referred to Isopterygiopsis muelleriana are not conspecific with European plants of this species. The description of Orthothecium catagonioides Broth. clearly fits character combination of Asian plants. This name was synonymized with Isopterygiopsis muelleriana when the genus Isopterygiopsis Z. Iwats. was established. We resurrect it and make a new combination in Isopterygiopsis. Molecular markers also demonstrate that I. muelleriana and I. catagonioides do not group with I. pulchella and I. alpicola. Therefore we establish a new genus, Isopterygiella, for the latter two species. Descriptions of genera Isopterygiella and Isopterygiopsis and their comparison are given; descriptions, illustrations and distribution data are provided for two species of Isopterygiopsis. Isopterygiopsis muelleriana is known in Russia from two localities in the Caucasus and one disjunct locality in the Russian Far East; I. catagonioides is common in Asian Russia, while in its European part it was found only in Polar Urals.