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New records of species of Achnanthidiaceae(Bacillariophyta) in Ganzi,Sichuan,China

Wang Yan-Lu;Yu Pan;Cao Yue;Wang Quan-Xi;You Qing-Min;College of Life Sciences,Shanghai Normal University;  
During an investigation of diatom diversity in the Ganzi Tibetan Autonomous Prefecture,Sichuan Province,China,eight species and one variety of Achnanthidiaceae were identified as new records in China.They included:Achnanthidium atomus Monnier,LangeBertalot Ector,A.straubianum(Lange-Bertalot) Lange-Bertalot,A.pseudoconspicuum(Foged) Jüttner Cox,Eucocconeis aretassi(Manguin) Lange-Bertalot,Planothidium lanceolatum var.minor Cleve,P.oestrupii(Cleve-Euler) Edlund,Psammothidium sacculus(Carter) Bukhtiyarova and P.didymum(Hustedt) Bukhtiyarova Round.The species were observed using light microscopy(LM) and scanning electron microscopy(SEM),with morphological characters and habitats described in detail.
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