FIGURES 33–38. Achnanthes citronella. 33 in Achnanthes citronella, A. trachyderma comb. nov. (Bacillariophyta) and allied taxa pertaining to the same morphological group

FIGURES 33–38. Achnanthes citronella. 33. Details of the SV striation. 34. Type slide 43609. 35. RV central area with the short and high/thick stauros (arrowheads). 36. Marginal dense RV striae (arrowhead). 37. RV apex with curved striae regularly spaced. 38. SV apex lacking areolae. Scale bars = 10 μm.