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A taxonomic revision of the genus Mastigolejeunea (Marchantiophyta: Lejeuneaceae)

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A world-wide revision of the liverwort genus Mastigolejeunea leads to the recognition of 18 species, including 16 extant and 2 fossil ones. Of 103 further species described in the genus, one is reduced to varietal level and 25 are transferred to other genera; 95 species (80%) are synonyms. Mastigolejeunea is closely related to Thysananthus; both genera share thick stems without hyalodermis, absence of Frullania-type branches, convolute leaves, elongate cells, cordate trigones, segmented oil bodies, undivided underleaves, gynoecia with 1–2 lejeunoid innovations, 3-keeled perianths, a non-arcticulate seta and absence of specialized means of asexual reproduction. The principal difference between the two is in the perianth, which is entire in Mastigolejeunea and toothed in Thysananthus. A key to the species of Mastigolejeunea is provided and each species is fully described and illustrated, with complete synonymy and details on habitat and distribution. The genus is pantropical with three species occurring in the New World, five in Africa, six in Australia and ten in Southeast Asia; one species, M. gradsteinii (Malaysia), is endemic. The species grow on bark or rock in moist tropical forests to about 1500 m elevation (exceptionally 3100 m). Several species are mainly restricted to the forest canopy and two are only known from limestone rock.
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Keywords: LEJEUNEACEAE; MASTIGOLEJEUNEA; TAXONOMY; THYSANANTHUS; TROPICAL LIVERWORTS

Document Type: Research Article

Publication date: 2014-11-01

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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