FIGURES 63–67 in Three new species of Ulnaria (Bacillariophyta) from the Wuling Mountains Area, China

FIGURES 63–67. Ulnaria gaowangjiensis sp. nov., external view, SEM. 63. One whole valve. 64–66. Details of the previous whole valve, note the biseriate striae becoming uniseriate striae composed of 2–4 tiny pores at the end of each stria (arrows). 67. Part of some striae showing the vela. Scale bar =10 μm (Fig. 63), 5 μm (Figs 64–66), 1 μm (Fig. 67).