Ignatov M.S.1,2, Voronkova T.V.1, Spirina U.N.1,3, Polevova S.V.2 2023. Arvildia, an Upper Permian moss and its possible relationships // Arctoa. Vol. 32: 243–260 [in English].
1 – Tsitsin Main Botanical Garden, Russian Academy of Sciences, Botanicheskaya Str., 4, Moscow 127276 Russia. E-mail: misha_ignatov@list.ru; ORCID: (MI) 0000-0001-6096-6315; (TV) 0000-0002-6112-271X; (US) 0000-0001-7010-5041;
2 – Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory Str. 1–12, Moscow 119234 Russia. E-mail: svetlanapolevova@mail.ru. ORCID: (SP) 0000-0003-2127-5639;
3 – Faculty of Biology, Tver State University, Zhelyabova 33, Tver 170100 Russia; e-mail: ulayspirina@mail.ru.
KEYWORDS: bryophytes, Russian Platform, Andreaeales, Dicranales, SEM, TEM, anatomy
ABSTRACT. New collections of a Late Paleozoic moss Arvildia allow us to circumscribe its morphology more precisely than it has been done earlier. Despite of the compression type of the material preservation, it was possible to embed the material from bulk maceration in epon-araldite resin and study it by series of thin and ultrathin sections with light and transmission electron microscopy. The weakly differentiated leaf costa and thick-walled and strongly bulging leaf cells support a possible relationships of Arvildia with Andreaeopsida, rather than with Dicranidae as it was supposed earlier. This study also shows that the cell damage differs in different parts of leaf and therefore such studies of compression highlight some biomechanical properties of moss leaves.
doi: 10.15298/arctoa.32.23