Gymnomitrion fissum (Gymnomitriaceae, Marchantiophyta) — a new species with fissured leaf surface from China

A. D. Potemkin, Yu. S. Mamontov, N. S. Gamova

DOI: https://doi.org/10.31111/nsnr/2017.51.274

Full article

Abstract

Study of selected specimens of Gymnomitrion collected by D. G. Long in Yunnan, China, revealed a new species, G. fissum Mamontov et Potemkin, sp. nov., with a fissured leaf surface. Comparison of SEM images of the leaf surface and leaf cross sections shows that the leaf surface of G. fissum is different from that of other known species with a superficially similar leaf surface, i. e. Mylia taylorii, M. verrucosa s. l. and Trabacellula tumidula. It has fissures around the cell lumen rather than grids and perforations. Outer cell walls of Gymnomitrion fissum are much thicker than in Mylia taylorii, M. verrucosa s. l. and Trabacellula tumidula, and their outer layers tend to be partly or completely caducous. G. fissum is related to the group of species assigned to the former genus Apomarsupella.

Keywords: cuticle, Gymnomitrion fissum, leaf surface, Yunnan, China

Section: Bryophytes

How to cite

Potemkin A. D., Mamontov Yu. S., Gamova N. S. 2017. Gymnomitrion fissum (Gymnomitriaceae, Marchantiophyta) — a new species with fissured leaf surface from China. Novosti Sist. Nizsh. Rast. 51: 274–280. https://doi.org/10.31111/nsnr/2017.51.274

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