Abstract: Cryptomonads exist in many types of freshwater.Cryptomonas ovata Ehrenberg,Cryptomonas erosa Ehrenberg are the most common species in Chinese reports.In fact,cryptomonads diversity was often overlooked because of the absence of Cryptophyta taxonomic articles in Chinese research,and the reports about cryptomonads may be incorrect.Samples were collected in various areas of Lake Donghu in Wuhan from 2009 to 2010.Eight cryptomonads species belonging to four genera were identified,specifically Cryptomonas ovata Ehrenberg,Cryptomonas erosa Ehrenberg,Cryptomonas pyrenoidifera Geitler,Cryptomonas parapyrenoidifera Skuja,Cryptomonas marssonii Skuja,Campylomonas reflexa(Skuja) Hill,Storeatula rhinosa Kugrens,Clay & Lee and Komma caudate(Geitler) Hill.Both Cryptomonas parapyrenoidifera Skuja and Storeatula rhinosa Kugrens,Clay & Lee were new records in China.Chroomonas acuta UtermÖhl,as the synonym of Komma caudate(Geitler) Hill,has been reported several times before in China.