FIGURE 34 in A morphometric diagnosis using continuous characters of Pinnunavis edkuensis, sp. nov. (Bacillariophyta: Bacillariophyceae), a brackish-marine species from Egypt

FIGURE 34. The distribution of proximal interstriae distances along semi-valve transects in Pinnunavis edkuensis, P. yarrensis, P. zalatii ("aegyptiaca" subset) and the Port Elizabeth sample. Each quadratic regression line represents a single valve based on c. 50–140 proximal interstriae distances. Transect distance is measured in µm from the transapical axis. Taxon means are indicated by triangles at transect locations x = 0, 10 and 20 µm. Each of the 3 graphic insets (a)–(c) shows for the 3 species the interstriae distances at transect locations x = 0, 10 and 20 µm, respectively, regressed against valve length. The axis in the inset graphs are the same as on the larger plot. The Port Elizabeth sample was not part of the anova, its means were not plotted in the larger graph, and it was not plotted in the insets. A traditional striae density scale is provided on the right side of the plot.