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Type: Article
Published: 2017-10-24
Page range: 91–107
Abstract views: 15
PDF downloaded: 1

Phylogenetic study of Mastigolejeunea (Marchantiophyta: Lejeuneaceae) and an amended circumscription of the genus Thysananthus

Department of Biology, Faculty of Science, Burapha University, 169, Long-Hard Bangsaen Road, Mueang, 20131, Chonburi, Thailand
Muséum National d’Histoire Naturelle, Cryptogamie, C.P. 39, 57 rue Cuvier, 75231 Paris cedex 05, France
classification liverworts Mastigolejeunea calcarata Mastigolejeunea florea morphology molecular phylogeny Ptychanthoideae Thysananthus subg. Mastigolejeunea Bryophytes

Abstract

Mastigolejeunea is morphologically close to Thysananthus and the separation of these two genera has long been controversial. The relationship between Mastigolejeunea and Thysananthus is assessed based on Bayesian inference and maximum likelihood analyses of plastid psbA-trnH, trnG and trnL-F, and nuclear ITS. Mastigolejeunea was resolved as sister to Thysananthus with moderate support, but M. calcarata was nested in Thysananthus subsect. Anguiformes and M. florea was resolved in Spruceanthus. Because diagnostic morphological features separating Mastigolejeunea from Thysananthus are lacking, Mastigolejeunea is treated as a subgenus of Thysananthus. The latter group becomes the second largest genus of Lejeuneaceae subfam. Ptychanthoideae with 30 species, and is one of the largest genera of liverworts that has been monographed worldwide.