FIGURES 23–43 in Cymatosirella Dąbek, Witkowski & Sabbe gen. nov., a new marine benthic diatom genus (Bacillariophyta) belonging to the family Cymatosiraceae

FIGURES 23–43: Cymatosirella benguelensis Dąbek & Witkowski sp. nov., Lamberts Bay, South Africa. All images originate from the holotype slide SZCZ 17497. Figs 23–33: LM images. Scale bar = 10 µm. Figs 32, 33: Living cells with plastids. Figs 34–39, 41, 42: SEM images. Figs 40, 43: TEM images. Figs 34–36: Frustule in girdle view with complete cingulum. Bands with one row of poroids (arrowhead). Fig. 37: External view of valve. Note the simple occlusions closing areolae and spines on the valve face. Figs 38, 39: Internal view of the valve and ocelluli. Fig. 40: Valve with occlusions (arrowhead) and spines (arrow). Fig. 41: Ocellulus composed of 13 porelli (3 central porelli). Figs. 42, 43: Central, bulged part of the valve face surrounded by one row of poroids and spines. Fig. 43: Detail of valve showing occlusions (arrowhead) and spines (arrow).