The distribution and variation of Synura species (Chrysophyceae) in Connecticut, USA

The genus Synura was found to be an important member of the phytoplankton communities in many Connecticut lakes, present in more than fifty percent of the 113collections made during 1984. Thirteen taxa, including a new forma, Synura petersenii f. truttae, were recorded for the first time in Connecticut waters using SEM. S. petersenii was the most important species, present in forty-one percent of the samples. Evidence for denoting S. petersenii var. glabra as a form, instead of a variety, is presented. Ecological preferences for some species are discussed.