Scale-bearing Chrysophyceae (Mallomonadaceae and Paraphysomonadaceae) from West Greenland

Phytoplankton samples from twenty-one freshwater localities in the area of Nuuk (Godthåb), West Greenland, have been examined by means of electron microscopy in order to investigate the flora of scale bearing Chrysophyceae. Forty-two taxa of the genera Mallomonas, Synura, Chromophysomonas (Spiniferomonas), Chrysosphaerella and Paraphysomonas have been observed, and thirty-eight of these are illustrated by TEM or SEM micrographs. Thirty-four of the observed taxa, among these all members of the genus Chromophysomonas , are for the first time recorded from Greenland. Chromophysomonas involuta sp.nov. is described. The scale morphology of the Greenlandic specimens is compared with earlier findings from other parts of the world, and the most remarkable features of the chrysophycean flora from the investigated area are discussed.