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Images

O.heptagona2.tif (Fig. 2. SEM. Hypothecal view. Plate 1p pentagonal and dorso-ventrally elongate. 1p=posterior intercalary plate.)
O.heptagona3.tif (Fig. 3. SEM. Thecal surface smooth with small scattered round pores (arrowheads).)
O.heptagona4.tif (Fig. 4. SEM. Po long and narrow, with curved slit-like apical pore; adjacent to plate 2'. Mucous present in form of narrow strands.)
O.heptagona5.tif (Fig. 5. SEM. Antapical view: hypotheca. Plate 1p central, large, roughly pentagonal, and narrows dorsally.)
O.heptagona6.tif (Fig. 6. SEM. Ventral view of cell revealing location of Vo (arrow), Vp and Rp (asterisk) in sulcus and cingulum. Sulcus small and recessed. Detritus attached to cell surface. Rp=ridged plate; Vo=ventral opening; Vp=ventral plate.)
O.heptagona7.tif (Fig. 7. SEM. Close up of Fig. 6. Rp (asterisk) adjacent to plate 2''''.)
oheptao10.tif (Fig. 8. Line drawing. Epithecal plate tabulation and apical pore region.)
oheptao11.tif (Fig. 9. Line drawing. Hypothecal plate tabulation.)
O.heptagona10.tif (Fig. 10. LM.)
O.heptagona11.tif (Fig. 11. LM.)

Ostreopsis heptagona