Bysmatrum subsalsum
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Fig. 2. SEM. Dorsal view. Hypotheca trapezoidal. Intercalary bands transversely striated. Cingulum deep, recessed and finely striated.

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Fig. 3. SEM. Apical view: APC. Intercalary plates 2a and 3a separated by plate 3'.

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Fig. 4. SEM. APC with apical pore plate and extended canal plate surrounded by thick smooth and raised margin. Po=apical pore plate; X=canal plate.

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Fig. 5. SEM. Antapical ventral view. Sulcus widens posteriorly. Anapical plates 1'''' and 2'''' indent hypotheca forming two lobes. Sp=sulcal plate.

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Fig. 6. SEM. Lateral ventral view: oblique axis and dorso-ventral compression.

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Fig. 7. LM. Ventral view: broadly rounded cell.

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Fig. 8. LM. Separated thecae. APC visible with apical pore plate and elongated canal plate. Hypothecal sulcal visible.

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Fig. 9. Line drawing. Ventral view: thecal plate arrangement.

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Fig. 10. Line drawing. Ventral view: oblique axis and dorso-ventral compression.

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Fig. 11. Line drawing. Apical view of epitheca with thecal plate designations.

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Fig. 12. Line drawing. Antapical view of hypotheca and sulcus.

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Fig. 13. Line drawing. Epitheca: plates 2a and 3a separated by apical plate 3'.

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