FIGURE 46–49 in The diatom genus Ctenophora: A discussion on its morphology, relationships, and some species

FIGURE 46–49: SEM micrographs, Ctenophora saxonica, Fig. 46, internal view of pole, with rimoportula, ocellulimbus, and striae; Fig. 47, detail of central area from valve and girdle view (arrows); Fig. 48, whole valve in girdle view; Fig. 49, details of VC and copula at pole, plain arrows indicating open bands and dashed arrows their ornamentation. Scale bars = 1μm (Fig. 46), = 2μm (Figs 47, 49), = 10μm (Fig. 48).