FIGURES 128–135 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 128–135. Scanning electron micrographs of tripolar Entogoniopsis lineolata from dredging DODO-123-D1, Mascarene Ridge, Indian Ocean. Fig. 128: External valve view. Location of rimoportulae indicated by arrow. Note spinules arranged in irregular rings on the valve face (arrowhead). Fig. 129: Detail of a polar elevation summit, showing a fractured pseudocellus. Fig. 130: Oblique external view of the specimen in Fig. 128. Note the convexity of the valve face and small thickenings on the hyaline marginal ridge (arrow). Fig. 131: Oblique internal view. Note the irregular ring of rimoportulae, indicated by arrow. Fig. 132: Detail showing a series of marginal internal costae, and a slight inward expansion of the hyaline margin of the mantle (arrowhead). Fig. 133: Detail of the specimen in Fig. 131, showing fractured, non-buttressed external tubes of the rimoportulae, arranged in an irregular ring. Note the spinules, indicated by the arrowhead. Fig. 134: Detail showing internal openings of the rimoportulae, arranged in an irregular ring. Fig. 135: Detail of the mantle, showing elongated areolae immediately below the hyaline marginal ridge (arrow), and rows of granules located between the rows of areolae (arrowhead).