Fig. 2. SEM. Left valve. Anterior end flat and oblique.
Fig. 3. SEM. Left valve apical region. Surface with large trichocyst pores in distinct pattern; small pores present around cell periphery.
Fig. 4. SEM. Apical valve view. Valve center concave. Periflagellar area smooth with 1 large flagellar pore.
Fig. 5. SEM. Periflagellar area: lateral view. Curved periflagellar collar (large arrow) situated opposite angled periflagellar plate (arrowhead), adjacent to flagellar pore. F=flagellar pore.
Fig. 6. SEM. Periflagellar area: valve view. Prominent curved periflagellar collar (arrowheads) opposite smaller angled periflagellar plate (large arrow). Flagellar pore bordered by periflagellar flange (small arrow).
Fig. 7. SEM. Intercalary band transversely striated and wider in dividing cells.
Fig. 8. SEM. Trichocyst pores in characteristic pattern; round to oblong with smooth edges, and equal size. Small surface pores circular with smooth edges near valve periphery.
Fig. 9. SEM. Theca inner surface smooth. Trichocyst pores round elevated structures (arrowheads). Valve relatively thick.
Fig. 10. LM. Right valve.