FIGURES 14–18 in Encyonema oblonga (Bacillariophyta, Cymbellaceae), a new species from Shanxi Province, China

FIGURES 14–18. Encyonema oblonga, sp. nov. SEM. Fig. 14. External view, with girdle bands evident. Slit-like areolae become much smaller on the mantle. Cingulum elements are of the open type. Figs 15–18, internal views. Fig. 15. Valve view showing continuous raphe through the center, lacking an intermissio. Helictoglossae terminate well before the valve end. Fig. 16. Apex of the valve showing striae with short stubs projecting within the striae. Fig. 17. Center of the valve, showing raphe lacks an intermissio. Fig. 18. Fractured valve showing raphe to be of the key and lock type.