Fig. 2. SEM. Hypothecal view. Plate 1p long and pentagonal. 1p=posterior intercalary plate.
Fig. 3. SEM. Two pore sizes on plates: large (arrowheads) and small (arrows).
Fig. 4. SEM. Po off-center with slit-like apical pore, adjacent to plate 2'. Po long, curved and narrow. Po=apical pore plate.
Fig. 5. SEM. Hypothecal view. Vo, Vp and Rp (asterisk) on cingulum. Vo situated on Vp, adjacent to Rp. Sulcus hidden and recessed, adjacent to plate 2''''. Rp=ridged plate; Vo=valve opening; Vp=valve plate.
Fig. 6. SEM. Arrangement of Vo, Vp and Rp (asterisk) plates.
Fig. 7. Line drawing. Thecal plate arrangement.
Fig. 8. LM.
Fig. 9. LM.