Morphological and molecular evaluation of Japanese Plicanthus R.M.Schust. (Anastrophyllaceae, Marchantiophyta)

Kyousuke AMAMOTO ； Yuya INOUE ； Mu Mu AUNG ； Tomio YAMAGUCHI

《TAIWANIA》 68卷2期 (2023/06) Pp. 250-254+s1

https://doi.org/10.6165/tai.2023.68.250

摘要

Plicanthus birmensis and P. hirtellus have been recognized in Japan. These species could be distinguished by features of ciliate leaf lobes and underleaves, and anatomy of stems. However, intermediate forms between these species can be found in Japan, and the circumscriptions of these species are unclear among Japanese populations. We evaluate morphological and molecular variations in Japanese Plicanthus to address the taxonomic identity of Japanese populations. The Japanese samples identified as P. birmensis, P. hirtellus and intermediate forms between them were nested within a clade. Among Japanese populations no significant correlation between morphological characters and phylogenetic relationships is confirmed, and the diagnostic characters to delimit these two species in Japan should be recognized as infraspecific variation. Thus, we recognize only one species, Plicanthus hirtellus in Japan.

關鍵字

Anastrophyllaceae ； Plicanthus hirtellus ； Plicanthus birmensis ； phylogenetic relationships ； infraspecific variation

參考文獻

Bakalin, V., Vilnet, A., Nguyen, V.S. 2020 Vietnamiella epiphytica – a new genus and species of Anastrophyllaceae (Hepaticae). Bryologist 123(1): 48–63.

Inoue Y., Tsubota, H. 2014 On the systematic position of the genus Timmiella (Dicranidae, Bryopsida) and its allied genera, with the description of a new family Timmiellaceae. Phytotaxa 181(3): 151–162.

Katoh, K., Standley, D.M. 2013 MAFFT multiple sequence alignment software version 7: improvements in performance and usability. Mol. Biol. Evol. 30(4): 772–780.

Kumar, S, Stecher, G., Tamura, K. 2016 MEGA7: Molecular Evolutionary Genetics Analysis Version 7.0 for Bigger Datasets. Mol. Biol. Evol. 33(7): 1870–1874.

Masuzaki, H., Shimamura, M., Furuki, T., Tsubota, H., Yamaguchi, T., Majid, A., Deguchi, H. 2010 Systematic position of the enigmatic liverwort Mizutania (Mizutaniaceae, Marchantiophyta) inferred from molecular phylogenetic analyses. Taxon 59(2): 448–458. (see Supplement)