Abstract
A phylogenetic analysis of the leafy liverwort genus Mesoptychia (incl. Leiocolea and Hattoriella), using two chloroplast markers, rbcL and rps4, was performed to clarify the circumscription of the genus and to establish its systematic position within the Jungermanniales. Ten species and one variety of Mesoptychia (out of a total of 17 accepted specific names), together with 85 species from 57 genera representing different lineages of Jungermanniales, were sampled. The results support the monophyly of Mesoptychia and its inclusion within the Jungermanniaceae, which itself forms a clade with the Delavayellaceae. Gymnocolea borealis, previously treated under Leiocolea (= Mesoptychia), is nested in the Anastrophyllaceae. The synonymy of Hattoriella with Mesoptychia is phylogenetically confirmed. Four major clades are identified within Mesoptychia and their circumscriptions and distinguishing morphological features are discussed.
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Acknowledgments
The first author would like to thank SYNTHESYS for financing her visit to the Royal Botanic Garden Edinburgh, UK (RBGE), RBGE and its staff for their collaboration and supply of specimens, the Conservatoire et Jardin botaniques de la Ville de Genève, Switzerland (CJBG) for the laboratory facilities, the staff of the CJBG laboratory for their assistance, Dr. Yamama Naciri (CJBG) for her advice and support, the Association des Amis du Jardin Botanique for financing field trips in the Swiss Alps, the Bourse Augustin Lombard for financing field work in Sweden, the Abisko Scientific Research Station for funding a research visit, Dr. Higuchi (TNS) and Dr. Risto Virtanen (OULU) for specimens, and Drs. Nadir Alvarez (University of Lausanne, Switzerland), Louis Nusbaumer (CJBG) and Camille Truong (CJBG) for their advice and discussions. We thank the two anonymous reviewers for their critical comments.
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Cailliau, A., Long, D.G., Price, M.J. et al. Phylogeny and systematic position of Mesoptychia (Lindb.) A. Evans. Plant Syst Evol 299, 1243–1251 (2013). https://doi.org/10.1007/s00606-013-0792-z
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DOI: https://doi.org/10.1007/s00606-013-0792-z