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中文摘要：
本文报道了采自新疆维吾尔自治区的桥弯藻科（硅藻门）中国新记录植物11种3变种,分别为Amphora mexi-canavar.major（Cleve）A.Cleve,Amphora twenteanaKrammer,Encyonema cespitosumK櫣tzing,Encyonema silesiacumvar.ventriformisKrammer,Cymbopleura albanicaKrammer et Miho,Cymbopleura apiculataKrammer,Cymbopleura schwe-ickerdtiiCholoky,Cymbella compacta strup,Cymbella diversaKrammer,Cymbella excisavar.subcapitataKrammer,Cymbella hantzschianaKrammer,Cymbella scutarianaKrammer,Cymbella subhelveticaKrammer,Cymbella vulgataKram-mer。对其分类学特征进行了详细的描述,并给出了它们的生境特征。
英文摘要：
Xinjiang Uygur Autonomous Region is located in Northwestern China,the largest area in all the province-level administrative regions of China,and it has especial geographic position and peculiar climate characteristic.Algae resources are very abundance in this region,but the research of algae flora is relative weakness.Diatom samples were collected in July and August,2001,from Xinjiang Province and obtained from a wide variety of habitats in the investigated area as lakes,rivers,springs,streams,swamps,ponds and temporary waters.Samples were fixed in 4% formalin and kept in the Herbarium of the Biology Department of Shanghai Normal University.Microscope slides were prepared by acid digestion method and mounted in Canada balsam or Hyrax gum.Light microscope observations were conducted using a Nikon E-800 DIC microscope at magnification x 1000 and a Nikon digital camera DXM1200.In the observation,eleven species and three varieties of Cymbellaceae（Bacillariophyta） are new records of China,they are Amphora mexicana var.major（Cleve） A.Cleve,Amphora twenteana Krammer,Encyonema cespitosum Kütz.,Encyonema silesiacum var.ventriformis Krammer,Cymbopleura albanica Krammer et Miho,Cymbopleura apiculata Krammer,Cymbopleura schweickerdtii Choloky,Cymbella compacta strup,Cymbella diversa Krammer,Cymbella excisa var.subcapitata Krammer,Cymbella hantzschiana Krammer,Cymbella scutariana Krammer,Cymbella subhelvetica Krammer and Cymbella vulgata Krammer.The taxonomic characters and habitat were described.The study will provide basic data for diatom resource investigation of China.
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