FIGURE 41–45 in The diatom genus Ctenophora: A discussion on its morphology, relationships, and some species

FIGURE 41–45: SEM micrographs, Ctenophora saxonica, Fig. 41, internal view of whole valve; Fig. 42, detail of buttressed central area; Figs 43, 44, detail of poles, for rimoportula, virgae and vimines; Fig. 45, external detail of pole with narrow sternum, areolae ornamentation, rimoportula (arrow) and ocellulimbus. Scale bars = 2μm (Figs 42, 43, 45), = 1μm (Fig. 44), = 10μm (Fig. 41).