Comments

A. External valve view in SEM. The concentrically undulate valve face is visible. The mantle area of the valve is also visible along with girdle bands. The external openings of the marginal strutted processes (msp) are present, and appear as simple pores along the valve mantle. “Tear drop” shaped areas are sunken in to the valve face. The punctae and the external openings of the central strutted process are contained within these “tear drop” shaped depressions. Scale bar equals ten microns.

Determination annotations

Other Annotations