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Taxonomy and species diversity of the diatom genus Thalassiosira (Bacillariophyceae) in Zhejiang coastal waters, the East China Sea

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Thalassiosira has been confirmed to be a very common genus in the Chinese coastal waters. However, the related studies were few and the species diversity could not be accessed accurately because most studies were performed under light microscope. For better understanding the morphological taxonomy and species diversity of Thalassiosira along the Zhejiang coastal waters (East China Sea), totally 52 net samples were collected from two locations. Field samples and nine established monoclonal strains were studied by light and electron microscope. The analysis revealed the presence of at least twenty-four species, including three new records for China, T. constricta, T. decipiens and T. fragilis, and eighteen new records for Zhejiang coastal waters. The morphological features of these Thalassiosira species were described, compared with previous illustrations in the literature and some morphological variations were reported and discussed. This study revealed a much higher species diversity of Thalassiosira than our previous understanding off Zhejiang coast and it may then serve as a baseline study for further studies on Thalassiosira in China and adds information to the global occurrence and taxonomy of Thalassiosira in temperate areas.
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Keywords: EAST CHINA SEA; SPECIES DIVERSITY; TAXONOMY; THALASSIOSIRA; ZHEJIANG COAST

Document Type: Research Article

Publication date: November 1, 2014

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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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