Fig. 2. SEM. Hypothecal view. Cell surface smooth with scattered pores (arrows).
Fig. 3. SEM. Cells compressed anterio-posteriorly.
Fig. 4. SEM. Thecal surface smooth; evenly spaced round trichocyst pores with smooth edges.
Fig. 5. SEM. Large Po, long and narrow, associated with plate 2'. Po with raised edge and narrow, curved slit-like apical pore. Po=apical pore plate.
Fig. 6. SEM. Cingulum deep, lipped and narrow (arrowheads).
Fig. 7. SEM. Cingulum inner surface lined with 2 rows of small pores (arrowheads).
Fig. 8. SEM. Ventral surface of cingulum revealing Vo, Vp and Rp (large arrow). Vo elongate and protuberant situated between plates 1'' and 1''''. Rp=ridged plate; Vo=ventral pore; Vp=ventral plate.
Fig. 9. SEM. Vo situated on Vp adjacent to Rp (arrows).
Fig. 10. SEM. Sulcus small and recessed, hidden under plate 1''''. Rp (asterisk) appears as an extension of sulcus. Plate 1'''' with a curved list (arrowhead).
Fig. 11. SEM. Right ventral view. Sulcus unusual, recessed, and adjacent to 1''''. Rp: a protuberant curved plate (arrowheads). Position of flagellar pore area (arrow).
Fig. 12. LM.
Fig. 13. LM.
Fig. 14. LM.
Fig. 15. LM. Nucleus large, spherical and posteriorly.