Ignatova E.A.1, Kuznetsova O.I.2, Fedosov V.E.1,3, Ignatov M.S.1,2 2023. An enigmatic species of Schistidium (Grimmiaceae, Bryophyta) from the Sayan Mountains, Asian Russia // Arctoa. Vol. 32: 189–198 [in English].
1 – Faculty of Biology, Lomonosov Moscow State University, Leninskiye Gory 1-12, Moscow, 119234 Russia. E-mail: arcoa@list.ru; fedosov_v@mail.ru; misha_ignatov@list.ru. ORCID: (EI) 0000-0001-6287-566; (VF) 0000-0002-5331-6346; (MI) 0000-0001-6096-6315;
2 – Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya Str., 4, Moscow 127276 Russia. E-mails: oikuznets@gmail.com. ORCID: (OK) 0000-0002-5513-1329;
3 – Botanical Garden-Institute, FEB RAS, Makovskogo Street, 142, Vladivostok, 690024 Russia.
KEYWORDS: mosses, taxonomy, biogeography, Asian Russia
ABSTRACT. During a field trip to Tunkinskie Goltsy Range, East Sayan Mountains, Republic of Buryatia a peculiar specimen of Schistidium with strongly concave, cucullate leaves was collected from rocks in a temporarily dry stream bed. It was identified as Schistidium chenii (Lin) Cao, Gao & Zhao. This species was previously known from two high mountain localities in China (Tibet and Xinjiang Uygur Autonomous Region). A molecular phylogenetic analysis of the Sayan specimen found its closest relative to be S. occidentale, a widespread western North American species, but recently discovered in Spain. The description based on specimen from Russia is provided; a comparison with S. occidentale and species similar to S. chenii in morphology is given.
doi: 10.15298/arctoa.32.16