FIGURES 6–15 in Two new Orthoseira species (Bacillariophyceae) from lava tubes on Île Amsterdam and Big Island (Hawai΄i)

FIGURES 6–15. Orthoseira verleyenii Van de Vijver sp. nov. Light microscope images. Figs 6–9 Valve views showing the variability in the extent of the hyaline central area. Figs 10–15. Details of the central area with an increasing number of carinoportulae (from 1 in Fig. 10 up to 6 in Fig. 15). Scale bar represents 10 µm.