Acknowledgements
L. T. Ellis acknowledges the support of the Natural History Museum, London. M. Burghardt acknowledges that his collection of Zygodon oeneus was made under investigation permit 003-2018-IC-FLO-DPAP-MA of the Ecuadorian Ministry of Environment. The work of I. V. Czernyadjeva was supported by Russian Foundation for Basic Research (grants # 18-05-60093) and it was carried out within the framework of the institutional research project (no. АААА-А19-119020690077-4) of the Komarov Botanical Institute of the Russian Academy of Sciences. H. H. Blom, T. Høitomt, T. H. Hofton, and K. Hassel thank Christian Schröck for confirming the identity of Didymodon subandreaeoides. The study by G. Ya. Doroshina was carried out within the framework of the institutional research project (no. АААА-А19-119020690077-4) of the Komarov Botanical Institute of the Russian Academy of Sciences. The study of Fedosov was supported by RSF RSF18-14-00121. The contribution of Michaela Kropik is part of her doctoral thesis on deadwood bryophytes in Austria. She acknowledges the financial support for her thesis by the ÖBf. The contributions by H. Bednarek-Ochyra have been financially supported through the statutory fund of the W. Szafer Institute of Botany of the Polish Academy of Sciences. She is also thankful to the Curator of Bryophyta at BM for kindly allowing her to study the herbarium material. The contributions of V. Plášek and Z. Skoupá are part of research projects of EU structural funding Operational Programme Research and Development for Innovation, project No. CZ.1.05/2.1.00/19.0388 and by the Ministry of Education, Youth and Sports of the Czech Republic in the ‘National Feasibility Program I’, project LO1208 ‘TEWEP’. The field work of M. Lebouvier on Îles Crozet was carried out within the programme 136 ECOBIO of the French Polar Institute (IPEV). S. Ştefănuţ acknowledges the support by project no. RO1567-IBB03/2020 through Institute of Biology Bucharest of Romanian Academy. Natalia E. Koroleva and Sergei Yu. Popov acknowledge the support of RFBR, project number 18-04-01010. Field work was organised by IPEE RAS and K. A. Ermokhina. A. D. Potemkin is grateful to E. A. Ignatova for searching for specimens of Odontoschisma elongatum in MHA and MW. The work of A. D. Potemkin and E. V. Kushnevskaya was supported by the contract for performance of scientific investigation work № PO19-5180 between the company Nord Stream 2 AG and Komarov Botanical Institute of the Russian Academy of Sciences. The study by A. D. Potemkin was carried out in the framework of the institutional research project of Komarov Botanical Institute of the Russian Academy of Sciences ‘Flora and systematics of lichens and bryophytes of Russia and phytogeographically important regions’ (АААА-А19-119020690077-4). The study by G. Ya. Doroshina was carried out within the framework of the institutional research project (no. АААА-А19-119020690077-4) of the Komarov Botanical Institute of the Russian Academy of Sciences. Pedro Drapela, Juan Larraín and María J. Cano thank Bill Buck for making available his collections of Leptodontium proliferum from Cape Horn, which were collected within the framework of the Bryoflora of the Cape Horn Archipelago project funded by the National Science Foundation, U.S.A. The work of O. Yu. Pisarenko pursues biocollection developing USU 440537 and was partly supported by RSF 18-14-00121. The study by A. I. Maksimov was carried out within the framework of the institutional research project 0218-2019-0078, AAAAA-A17-117031710038-6. The study by M. V. Dulin was performed within the scope of the state task No. AAAA-A19-119011790022-1.