Vincularia roraimae (Zygnematophyceae, Desmidiales), gen. et sp. nov. from the top of Mt. Roraima, Venezuela

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Abstract:

Venezuelan table-top Mountains (tepuis) are known to be unique ecological ecosystems with high incidence of endemic species. During the years 2000 and 2006, samples of algae from various types of habitats (moist rock walls, small rock pools, peat bogs, small streams and waterfalls) were collected on the top of Mt. Roraima in order to investigate the algal and cyanobacterial flora of this table-top mountain. We found Vincularia roraimae, a new desmid genus and species in small streams on the summit of Roraima Tepui. Cells of this alga are of Cosmarium -type shape, but are apically attached to thick, colourless mucilaginous fibers. The name Vincularia is derived from the Latin word vinculum (bundle), as the fibers produced by the cells appear to "grow" in bundles.

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0029-5035/2009/0088-0049

Publication date: February 1, 2009

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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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