A review of the genus Glyphomitrium Brid. (Rhabdoweisiaceae, Bryophyta) in the Russian Far East

ABSTRACT

Introduction

The diversity of the moss genus Glyphomitrium Brid. is concentrated in East Asia. Its range extends to the southern part of the Russian Far East, where its species are rather widespread in hemiboreal coniferous forests. However, the species to which Russian specimens should be assigned remains unclear.

Methods

A morphological survey was conducted, along with a molecular phylogenetic study based on the plastid trnS–trnF and nuclear ITS regions. Of the three lineages identified, two were investigated using species distribution modelling.

Key results

For two of three revealed lineages, the use of the names Glyphomitrium crispifolium Nog. (previously considered to be a rare Japanese endemiс) and G. humillimum (Mitt.) Card. are suggested, whereas the third one, which combines excurrent costae of stem leaves and subulate acumina of the perichaetial leaves, is described as a new species, G. ambiguum Fedosov. In Russia, G. crispifolium is mostly associated with the cooler and more humid climate of hemiboreal forests, whereas G. ambiguum occurs in drier conditions in broadleaved forests. Although the niches of G. crispifolium and G. ambiguum were assessed as being rather similar, their ranges overlap weakly.

Conclusions

Our results suggest the presence of three species of Glyphomitrium at the northern limit of its distribution in Asia. Results of niche distribution modelling show that the two species’ distributions depend on different predictors, and thus this tool appeared helpful for integrative taxonomic purposes. By contrast, the results of the niche similarity/divergence test were inconclusive.

KEYWORDS:

• Biodiversity
• East Asia
• integrative taxonomy
• ITS
• MaxEnt
• mosses
• rps4
• trnL–trnF

View correction statement:

Correction

Acknowledgements

We thank Olga Afonina for her help with the literature, Vadim Bakalin for sending the specimens from VLA and VGBI, Ryszard Ochyra for a detailed discussion of taxonomical and nomenclatural issues, and also Terry MacIntosh and Neil Bell for helpful comments on the manuscript and corrections to the English. We are also grateful to two anonymous reviewers for their helpful comments and suggestions.

Disclosure statement

No potential conflicts of interest were reported by the authors.

Supplemental material

Supplemental material for this article can be accessed here: https://doi.org/10.1080/03736687.2022.2126097.

Additional information

Funding

The SEM work was carried out at the User Facilities Center of M.V. Lomonosov Moscow State University, with the financial support of the Ministry of Science and Higher Education of the Russian Federation. The work was partly supported by RSF Grant # 18-14-00121. A. V. Shkurko and A. V. Fedorova are also grateful for support from the Tsitsin Main Botanical Garden state assignments no. 122011400178-7 and 122020300187-2. The work on the Hirox RH-2000 video microscope was carried out using the equipment of the MSU Shared Research Equipment Center ‘Technologies for obtaining new nanostructured materials and their complex study’ and purchased by MSU within the framework of the Equipment Renovation Program (National Project ‘Science’). We thank the Ministry of Science and Higher Education of the Russian Federation for support and the Center of Collective Use ‘Herbarium MBG RAS’ (grant 075-15-2021-678).

Notes on contributors

Vladimir E. Fedosov

Vladimir E. Fedosov is a bryologist at Moscow State University (Moscow) and the Botanical Garden-Institute, Vladivostok, Russia. His research interests include the phylogenetics, taxonomy, morphological evolution, biogeography and ecology of bryophytes. He has also published the results of several regional bryophyte surveys carried out all over Russia.

Anna V. Shkurko

Anna V. Shkurko is a bryologist at Tsitsin Main Botanical Garden (Moscow), Russia. Her interests include taxonomy and ecology of Sphagnum mosses as well as application of species-distribution modelling for species delimitation.

Elena A. Ignatova

Elena A. Ignatova is a bryologist at Moscow State University (Moscow), Russia. Her research is largely devoted to the biodiversity, taxonomy, anatomy, morphology, development and biogeography of mosses, and also local bryophyte diversity assessments in various areas of East Europe and North Asia.

Alina V. Fedorova

Alina V. Fedorova is a botanist and head bryologist at the Tsitsin Main Botanical Garden (Moscow), Russia. Her research interests include the phylogeny and taxonomy of mosses and vascular plants.

Michael S. Ignatov

Mikhail S. Ignatov is a bryologist at Moscow State University (Moscow) and Tsitsin Main Botanical Garden (Moscow), Russia. His research interests include the phylogenetics, taxonomy, anatomy, morphology, development and biogeography of bryophytes and also fossil mosses. He is the author of numerous reports of regional bryophyte diversity based on surveys carried out all over Russia and further afield.