FIGURES 161–166: SEM micrographs of Gomphosphenia tenuis. Figs 161–163. External valve view; a single row of areolae present on valve mantle. Fig. 164. Detail of mid-valve, showing proximal raphe endings and striae composed of single areola. Proximal raphe endings widened and slightly deflected. One central striae/areola from one valve side absent. Fig. 165. Detail of head pole. Distal raphe fissure widened, terminates with teardrop-shaped pore. Fig. 166. Detail of foot pole. Raphe terminates with teardrop-shaped pore. APF not present on base pole. Scale bars in Fig. 161 = 5 µm; Figs 162, 163 = 10 µm; Figs 164, 166 = 2 µm; Fig. 165 = 1 µm.

Published as part of Levkov, Zlatko & Williams, David M., 2011, Fifteen new diatom (Bacillariophyta) species from Lake Ohrid, Macedonia, pp. 1-41 in Phytotaxa 30 on page 21, DOI: 10.11646/phytotaxa.30.1.1, http://zenodo.org/record/4894396