New Records of Desmids from Arshan, China

There are various types of marshes in Aershan,Great Xing’an Mountains,and Desmids is abundant there.260 specimens were collected in July 2004,August 2005,October 2005 and May 2006.Among these specimens,8 species and 2 varieties are new records of Desmids in China,they are Cosmarium pachydermum var.incrassatum,C.perforatum,C.protractum,Staurastrum denticulatum,S.dispar,S.furcigerum var.armigera,S.subavicula,S.subcruciatum,Staurodesmus insignis and Euastrum montanum.