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A new species of Ceratolejeunea Jack & Steph. (Lejeuneaceae, Jungermanniopsida) from a remnant of Amazonian forest in Maranhão, Brazil

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During a study of the bryophytes from Amazonia Maranhense, in a remnant of non-flooded forest in Mirinzal municipality (Maranhão, Brazil), an unknown species of Ceratolejeunea was collected. It showed few morphological differences to Ceratolejeunea laetefusca (Austin) R.M.Schust. in the gametophyte, but characters of the perianth suggested that the species is new for science. This paper aims to describe and illustrate this new species, comparing it with related taxa. Ceratolejeunea maranhensis belongs to the genus Ceratolejeunea by possessing dark pigmented plants (light brown to brown), leaves with basal ocelli, orange-brown pigmented cell walls, and horned perianths. The new species belongs to the subgenus Caduciloba R.M.Schust. because of bifid underleaves and perianth horns not bulbous. It differs from the other members of the genus by possessing perianths with four low horns apically ornamented by 2–3 cilia or lacinia each, and with surface made up by mammillose and thick-walled cells. This unique condition separates the new species from the morphologically closely related Ceratolejeunea laetefusca and C. cubensis (Mont.) Schiffn.
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Keywords: BRAZIL; CERATOLEJEUNEA; JUNGERMANNIOPSIDA; LEJEUNEACEAE; LIVERWORTS; MARANHÃO

Document Type: Research Article

Publication date: 01 November 2012

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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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