Studies on silica-scaled chrysophytes from the Daxinganling Mountains and Wudalianchi Lake Regions, China

Twenty one phytoplankton samples containing chrysophytes were collected in July 2009 and August 2011 in Daxinganling Mountains and Wudalianchi Lake Regions located in Northeast China. Forty two species and two varieties of silica-scaled chrysophytes have been identified by means of transmission electron microscopy, nine of them belonging to Paraphysomonadaceae and thirty-five to Synurales. Chrysosphaerella longispina, Spiniferomonas abei, Paraphysomonas eiffelii, Mallomonas maculata, M. lelymene, M. pumilio, M. eoa, M. torquata, Tesselaria lapponica, Synura bjoerkii are reported for the first time in China. Chrysosphaerella longispina, Mallomonas punctifera, M. multiunca, M. torquata, Tesselaria lapponica, Synura bjoerkii are distributed in the northern temperature region. The geographical distribution and ecological characteristics of the silica-scaled chrysophytes collected from these regions are discussed.