Fig. 2. SEM. Left valve. Anterior end with distinct flared flattened curved apical collar. Intercalary band smooth.
Fig. 3. SEM. Areolae round to ovoid with smooth margin.
Fig. 4. SEM. Periflagellar area: flagellar pore surrounded by flared periflagellar collar (arrow); adjacent to auxiliary pore. Pores equal in size. f=flagellar pore; a=auxiliary pore.
Fig. 5. Line drawing. Areolae arrangement.
Fig. 6. LM. Left valve. Areolae arrangement.
Fig. 7. LM. Left valve. Areolae arrangement.
Fig. 8. LM. Right valve. Pyrenoid round and central. Intercalary band wide and appears striated. P=pyrenoid.
Fig. 9. LM. Left valve. Anterior flared curved apical collar visible (arrows). Nucleus posterior. N=nucleus.