FIGURES 7–20 in Bicudoa amazonica gen. nov. et sp. nov. (Bacillariophyta)-a new freshwater diatom from the Amazon basin with a complete raphe loss in the Eunotioid lineage

FIGURES 7–20. LM micrographs (bright field optics) of Bicudoa amazonica (Figs 7–14). Holotype population from the Rio Negro hydrographical basin, Brazil (SP–400.477). Fig. 7 Large cell showing slight dorsiventrality and irregular pattern of striae; Fig. 8 Holotype specimen; Figs 7–13 Micrographs illustrating size reduction series in the type population; Fig. 14 Two cells in connective view; Figs 15–17 Three Eunotia species similar in size and shape: Fig. 15 Eunotia pileus var. guianense (Ehrenberg) E. Reichardt; Fig. 16 Eunotia coringii Metzeltin & Lange-Bertalot; Fig. 17 Eunotia ventriosa R.M. Patrick. Note the helictoglossae present and visible on all Eunotia species (black arrow); Figs 18–20 Size reduction series of Fragilariforma hamiltonii Metzeltin & Lange-Bertalot. All specimens from the Rio Negro basin. Scale bar: 10 µm.