FIGURES 69–75 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 69–75. Scanning electron micrographs of Entogoniopsis novazealandica from Oamaru, New Zealand. Fig. 69: Oblique external view, showing the depressed valve face centre. Fig. 70: Detail of a hemispherical pseudocellus. Fig. 71: Oblique internal view of the specimen in Fig. 69. Note the absence of rimoportulae within the central depression. Arrow indicates a transverse costa next to the proximal side of a polar elevation. Fig. 72: Oblique external view of a specimen with a circumferential raised sector adjacent to the central depression. Fig. 73: Girdle view of a specimen with highly elevated polar pseudocelli. Note the offset of the polar elevations from the valve margin. Fig. 74: Oblique view of a specimen with attached valvocopula. Note clasping devices indicated by arrows. Fig. 75: Detail of the valvocopula attachment, with two clasping devices embracing internal costae visible. Arrow indicates the fossa, attached to the inwardly expanded hyaline margin of the mantle.