FIGURES 130–135 in Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov.

FIGURES 130–135. Anorthoneis arthus-bertrandii De Stefano & C. Pennesi, sp. nov., SEM images. (130) External view of sternum valve; (131) Detail of sternum valve showing the presence of vestigial perforations in hyaline-like central area; (132). Detail of the sternum valve mantle showing biseriate striae close to the valve margin; (133) Internal view of sternum valve; (134) Detail of the sternum valve (internally) showing the eccentric central area with vestigial perforations; (135) Detail of circular areolae internally occluded by rota-like vela. Figs 130, 133 = 5 μm; Fig. 134 = 2 μm; Figs 131, 132, 135 = 1 μm.