FIGURES 122–129 in Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov.

FIGURES 122–129. Anorthoneis vortex specimens from Sterrenburg (1987) cleaned material from Bergen aan Zee, The Netherlands, SEM images. (122) External raphe-sternum valve with asymmetric raphe; (123) Tilted external view (60°) of raphe-sternum valve showing the concave mantle; (124) Internal view of raphe-sternum valve; (125) Tilted external view (60°) of raphe-sternum valve; (126) External coaxial, expanded, pore-like central raphe endings; (127) External expanded, pore-like distal raphe ending terminating in a roundish submarginal hyaline area. Smaller, non-hymenate poroid is present at the end of each biseriate stria close to the valve margin (arrow); (128) Internal, uncinated proximal raphe endings deflected in opposite directions converging on the central nodule; (129) Internal distal raphe ending terminating in a reduced helictoglossa close to the hyaline terminal area. Smaller, not-hymenate poroid is present at the end of each biseriate stria (Arrow). Scale bars: Figs 122, 124, 125 = 5 μm; Fig. 123 = 2 μm; Figs 126–129 = 1 μm.