FIGURES 108–113 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser

FIGURES 108–113. Scanning electron micrographs of Entogoniopsis squamata from dredging DODO-123-D1, Mascarene Ridge, Indian Ocean. Fig. 108: Oblique external view, showing the conspicuously depressed valve face. Note the rows of areolae on the mantle becoming slightly divergent closer to the poles. Fig. 109: Oblique internal view, showing the depressed valve face and rows of marginal internal costae. Note the sparser areolation within the central area (arrow). Fig. 110: Valve (V) with attached valvocopula (VC) in girdle view. Note the hyaline marginal ridge level with the summits of the polar elevations (arrow). Fig. 111: Detail of the specimen in Fig. 109, showing the pattern of loops ('scales' in Pantocsek's description) formed by the internal costae, and the inwardly expanded hyaline mantle margin. Fig. 112: Oblique internal view of the specimen in Fig. 110, showing the valvocopula attached to the valve by means of clasping devices embracing the internal costae (arrow). Fig. 113: Detail of the specimen in Fig. 110, showing arrowhead-shaped clasping devices.