FIGURES 12–17 in A new diatomspecies of Aneumastus D. G. Mann & Stickle ((Bacillariophyta, Bacillariophyceae, Mastogloiales, Mastogloiaceae) from Tibet, China

FIGURES 12–17. SEM micrographs of Aneumastus yamdrokensis Fig. 12. External view of the valve, showing the undulate raphe. Fig. 13. The hooked distal raphe ends extend onto the valve mantle. Fig. 14. Showing the expanded proximal raphe ends and the complex areolae. Fig. 15. Internal view of the valve, showing the straight raphe slit lying in the sternum. Fig. 16. Pseudoseptum and helictoglossa are present at the apex (see arrow). Fig. 17. Showing the sieves of small pores within the striae (see arrow).