FIGURES 166–193 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species

FIGURES 166–193. LM and SEM images of Achnanthidium peruvianum from from Salto do Iporanga reservoir, São Paulo state (SP- 469207). 166–176. LM views of raphe valves. 177–186. LM views of rapheless valves. 187–189. Girdle views of the taxon. 190–192. SEM external view of raphe valves showing striation pattern, axial and central areas. 193. SEM external view of the rapheless valve showing striation pattern, axial and central areas. LM scale bar = 10 μm. SEM scale bars indicated in each figure.