
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. 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. 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).