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Fragilaria flexura sp. nov. (Bacillariophyceae) – A new freshwater diatom from a meso-oligotrophic mountain lake on the Kamchatka Peninsula, Russia

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A new freshwater diatom, Fragilaria flexura sp. nov., was identified from light and scanning electron micrographs of sediment core material from a mountain lake in the Sredinny Mountains of Kamchatka Peninsula (Russia). Fragilaria flexura sp. nov. possesses an unique combination of morphological features, which allows its discrimination from previously identified, similar taxa such as Fragilaria cyclopum and Hannaea arcus. Fragilaria flexura sp. nov. is characterized by its valve outline, which is sickle-shaped and may or may not have a notch-like depression on the ventral margin, narrowly rounded ends and a very large, bilateral, hyaline central area. Fragilaria flexura sp. nov. seems to prefer meso-oligotrophic habitats.
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Keywords: BACILLARIOPHYCEAE; COLD WATER SPECIES; DIATOMS; FRAGILARIA FLEXURA; FRESHWATER; KAMCHATKA; MESO-OLIGOTROPHIC MOUNTAIN LAKES; RUSSIA

Document Type: Research Article

Publication date: 2011-05-01

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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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