Comments

A. Internal valve view in SEM. The central strutted processes (csp) are visible in the internally depressed portion of the valve face central area undulation. The marginal strutted processes (msp) can also be seen on every costa, except the costa bearing the labiate process. The !abiate process (lp) is also visible on the valve mantle, and generally occurs singularly in this species. Crib are absent in this species. Scale bar equals ten microns.

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