Fig. 2. SEM. Apical lateral view. Valves laterally compressed.
Fig. 3. SEM. Periflagellar area. Small shallow depression on right valve. 2 pores present: flagellar pore and auxiliary pore. Adjacent to flagellar pore is small apical spine (single arrow). Adjacent to auxiliary pore is small curved forked periflagellar collar (double arrows). A=auxiliary pore; F=flagellar pore.
Fig. 4. LM. Oval cell. Small anterior spine visible; 2 large pusules (arrows).
Fig. 5. LM. Oval cell. Small anterior spine visible; 2 large pusules (arrows).
Fig. 6. LM. Oval cell with wide intercalary region.
Fig. 7. LM. Triangular shaped cell. Intercalary band transversely striated. Small apical spine visible.
Fig. 8. Line drawing. Oblong cell.
Fig. 9. Line drawing. Triangular shaped cell.
Fig. 10. Line drawing. Broad-based thecal spines.