portrait

Description:

Durinskia baltica cells are round from the ventral side, slightly dorso-ventrally flattened, 16 - 28 microns long, 15 - 27 microns wide, and approximately 19 microns broad. Thecal plates present: an apical pore, a canal plate, 4 apical plates, 2 anterior intercalary plates, 7 precinguluar plates, 5 cinguluar plates, 4 sulcal plates, 5 postcingular plates, 2 posterior plates. Second apical intercalary plate much larger than the first and extending across the dorsal side. Cingulum 2-3 microns wide, consists of 5 plates, including a transitional plate. The large anterior sulcal plate forming a list over the left sulcal plate. Thecal plates smooth, with scattered pores (about 0.2 microns). Pores form a row along the edge of the cingulum. Nucleus round, in the centre or in the left side of the cell, approximately 7 microns. Reddish stigma, approximately 4 microns long, present in the sulcus. Yellow- brown plastids, 2 - 3 microns diameter, scattered throughout the cell.