FIGURE 3 in A new species of the diatom genus Campylodiscus (Bacillariophyta, Surirellaceae) from Dongtan, Chongming Island, China

FIGURE 3. SEM micrographs of Campylodiscus sinensis, sp. nov. a. External view of the whole valve with two kidney-shaped convexities in central area. b. Internal view of the whole valve with two kidney-shaped depressions in central area. c. Lateral view of the whole valve showing saddle-shape. d. Cingulate view of the whole valve, raphe is raised on a keel. e. Costae with striae formed by a single row of puncta in parallel, and continue in parallel onto the mantle. f. Central area, kidney-shaped convexities with many pyramid-shaped verrucae. g. The raphe is raised on a keel at the valve margin with interruption (arrow). h. Internal view of costae containing double rows of puncta, two types of fibulae on the keel. i. Kidney-shaped depression containing a single row of puncta. j. Detail of the interrupted raphe fissure (arrow). Scale bars are presented directly on the micrographs.