Comments

D. Internal valve mantle area in SEM. The marginal strutted processes can be seen on every primary costa. The primary costa connect the valve face margin/ mantle junction and the across the marginal annulus. The secondary costae connect the valve face margin/ mantle junction and the outer most portion of the marginal annulus. The marginal strutted processes. The labiate process is present on the valve face and is generally reduced. Scale bar equals one micron.

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