PLATE 15, FIGURES 91–96. G. rostratoides. SEM. Figs 91–93, external views. Fig. 91 in New Gomphoneis Cleve (Bacillariophyceae: Gomphonemataceae) species from Xinjiang Province, China

PLATE 15, FIGURES 91–96. G. rostratoides. SEM. Figs 91–93, external views. Fig. 91. Headpole with doubly-punctate striae ending from the valve face onto the mantle. The raphe is deflected slightly before extending onto the mantle. Fig. 92. Central area with biseriate striae tapering to uniseriate striae near the axial area. Proximal raphe ends are dilated. Fig. 93. Footpole, with apical pore fields bilobed, with porelli of the same size and structure as the areolae. Raphe is deflected slightly on the valve face, before extending onto the mantle. Figs 94–96, internal views. Figs 94, 96, headpole and footpole, respectively, showing presence of pseudosepta and helictoglossae. Thin interstriae separate the rows of porelli at the footpole. Fig. 95. Central area with raised central nodule bearing recurved proximal raphe ends. Curved striae taper from doubly punctate to uniseriate. Prominent thickenings are oriented perpendicular to the interstriae and occur when the striae are uniseriate.