The bryophyte flora of Eriechka River upper course (SE Taimyr), with comments on the first record of Pseudoditrichum mirabile in Asia

Abstract

The bryophyte flora of Eriechka River upper course includes 66 species of liverworts and 262 species of mosses. Annotated list provides data on species frequency, habitat characteristics and associated species. Species composition in different habitats is overviewed. Distribution of some rare species, as well as a taxonomic status of Herbertus arcticus are discussed. Pseudoditrichum mirabile Steere & Z.Iwats. is found in Russia for the first time. This is the second worldwide record of this unique species with ambiguous taxonomic position, described in the monotypic family Pseudoditrichaceae. Differences in moss flora between Proterozoic siliceous limestone and Cambrian dolomites poor in silica are observed. Most Seligeria species in the study area were found in ecotopes formed by Proterozoic siliceous limestone. Резюме Бриофлора верховий р. Эриечка включает 66 видов печеночников и 262 вида мхов. Приводится аннотированный список видов, содержащий данные о частоте их встречаемости, занимаемых ими биотопах и сопутствующих видах. Охарактеризованы основные группировки мохообразных района. В исследованной бриофлоре представлен ряд редких видов, обсуждаются особенности их распространения и статус Herbertus arcticus. Pseudoditrichum mirabile Steere & Iwats. приводится впервые для России. Это второе местонахождение в мире этого уникального таксона неясного родства, относимого к монотипному семейству Pseudoditrichaceae. Рассмотрены существенные различия петрофитных бриофлор, формирующихся на кремнеземистых протерозойских и малокремнеземистых кембрийских карбонатных горных породах; в частности, показано, что представители рода Seligeria приурочены только к первым.

Liverworts of Putorana Plateau (East Siberia): an updated checklist

“…We found only one species of Marsupella (M. condensata, new for the plateau), one species of Gymnomitrion (G. concinnatum, also recorded by Zhukova, 1986b) and no Prasanthus. Noticeably, this trait joins the present flora with recently studied hepatic flora of the upper course of Eriechka River (Fedosov et al, 2015). In the latter flora, only one species of Marsupella and two species of Gymnomitrion were recorded, although altitude variation and orography could suggest much larger number of the latter family members.…”

“…Therefore, the summarized list of liverworts known in Putorana Plateau counts 118 taxa. The number of taxa found in our collections is relatively high and comparable with, e.g., Eriechka River (Fedosov et al, 2015) in Anabar Plateau, where thoroughness of collecting and area size was nearly the same. In the latter locality, 66 species of liverworts were recorded.…”

Phylogenetic inference and peristome evolution in haplolepideous mosses, focusing on Pseudoditrichaceae and Ditrichaceaes. l.

“…Although molecular phylogenetic analysis has become a standard tool for solving the taxonomic position of problematic taxa, Pseudoditrichum has not been included in these studies, probably because the existing material was too old for DNA amplification. However, the species was recently collected in northern Siberia (Fedosov et al ., ), allowing the clarification of its phylogenetic position and the testing of the alternative conclusions of Steere & Iwatsuki () and Shaw () regarding its peristome structure, i.e. opposite or pseudo‐opposite.…”

New records of Scapania sphaerifera H.Buch et Tuom. in Europe with description of global distribution and ecology of the species

“…55°46'N) in the south (Sofronova, 2013) where it is known from single locations at the altitudes of about 950 m, up to 67°04'N in the Orulgan Sis Range in the north, where it is rather frequent (Sofronova et al, 2015). The northernmost recently known locations of the species 71°15' are in Taimyr (Fedosov et al, 2015). In the Far East of Russia the species is known from the North in the Magadan Province up to the south of the Primorsky Territory (Choi et al, 2012a) whereas the most southern locality is recorded in South Korea (Choi et al, 2012b).…”

“…The highest known location of the species is in South Siberia in Khamar-Daban (Kamushinskiy Pass, 2048 m alt., http://kpabg.ru/h/?q=node/400726). Scapania sphaerifera is rather basiphilous species, but in its northernmost location it occurs in moist crevices of limestone cliffs (Fedosov et al, 2015) which is quite unusual for the species. Here it grows mixed with Trilophozia quinquedentata.…”