Comments

B. Internal valve view in SEM. The marginal strutted processes are present near the mid point of the valve mantle. The labiate process (lp) is present on the valve mantle and always occurs singularly in this species. Central strutted processes are not present. The costae at the valve face/ mantle junction are slightly thickened and widened forming definite false chambers. The cribra are domed and are arranged in fascicles. Scale bar equals five microns.

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