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TAXON

Plant Diversity and Resources

Journal of Systematics and Evolution

Volume 56 Issue 1, Pages 67C75.

Published Online: 14 Dec. 2017

DOI: 10.1111/jse.12293

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Reinerantha foliicola, a new genus and species of Lejeuneaceae subtribe Cololejeuneinae (Marchantiophyta) from Ecuador

S. Robbert Gradstein1*, Rui-Liang Zhu2, Lei Shu2, and Álvaro J. P└rez3

1Mus└um National d'Histoire Naturelle, Institut de Syst└matique Evolution Biodiversit└, Herbier National, 75004 Paris, France

2Department of Biology, School of Life Sciences, East China Normal University, Shanghai 200062, China

3Herbario QCA, Escuela de Ciencias Biol┏gicas, Pontificia Universidad Cat┏lica del Ecuador, Quito, Ecuador

Keywords: Diplasiolejeunea; epiphyllous liverworts; molecular phylogeny; morphology; taxonomy; Tuyamaella; Tuyamaella jackii

Abstract:

Cololejeuneinae is the largest subtribe of the liverwort family Lejeuneaceae and the crown group of the family. The species often grow on the surfaces of living leaves and twigs or in swiftly running waters and many of them possess neotenic gametophytes, considered an adaptation to these extreme habitats. We describe a new, epiphyllous genus and species in Cololejeuneinae from the Western Cordillera of Ecuador, Reinerantha foliicola Gradst. & R.L.Zhu. Analysis of combined molecular datasets with parsimony, maximum likelihood and Bayesian methods revealed Reinerantha in a sister relationship to the large pantropical genus Diplasiolejeunea. Reinerantha differs from Diplasiolejeunea in leaf segmentation, epidermal wall thickening, stylus, male bracts and perianth keels, and is morphologically more similar to the genus Tuyamaella. In the molecular analysis, however, Reinerantha and Tuyamaella were resolved in different clades and not closely related. Tuyamaella is shown to be restricted to Asia; the report of Tuyamaella from South America (Peru) was erroneous and a case of mislabeling.

 

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