Fig. 2. SEM. Apical view. 1' plate long and narrow. Po with a raised inner elliptical ridge. Cingulum with lists. Strong ridges outline plates along sutures. Po=apical pore plate.
Fig. 3. SEM. Close-up of thecal areolae with large trichocysts (arrow).
Fig. 4. Line drawing.
Fig. 5. SEM. Resting cyst: sperical with numerous tapering spines.
Fig. 6. SEM. Resting cyst: after excystment.