FIGURES 26–29 in Cocconeis tsara sp. nov., C. santandrea sp. nov. and allied taxa pertaining to the new section Loculatae

FIGURES 26–29. Cocconeis tsara sp. nov. SEM (Anakao, West coast of Madagascar). RV in internal view (26–29). Raised marginal rim, proximal raphe ending bent in opposite sides, marginal areolae axially split in two parts (26, arrow). RVVC with fimbriae with hammerlike endings (27, arrows) and oblong and smooth papilla (27, framed arrowhead). Hammer-like fimbriae (28, arrowheads), fimbriae each two virgae. No areolae on apex (29, arrow), vestigial fimbriae (29, arrowheads) between each virga, helictoglossa discreet (29). Scale bars = 3 µm (26), 700 nm (28–29), 500 nm (27).