FIGURES 194–214 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species

FIGURES 194–214. LM and SEM images of Achnanthidium ritae sp. nov. from the type (SP-427904) from Billings complex, Taquacetuba branch, São Paulo state. Figure 205 corresponds to the holotype. 194–201. LM views of raphe valves. 202–210. LM views of rapheless valves. 211. SEM external view of raphe valve showing striation pattern, axial and central areas. 212. SEM internal view of the raphe valve. 213. SEM external view of the rapheless valves showing striation pattern, axial and central areas. 214. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.