FIGURES 26–44 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species

FIGURES 26–44. LM and SEM images of Achnanthidium brasiliense sp. nov. from the type (SP-428935) from Tanque Grande reservoir, São Paulo state. Figure 34 corresponds to the holotype. 26–33. LM views of raphe valves. 34–38. LM views of rapheless valves. 39, 40. SEM external view of raphe valves showing striation pattern, axial and central areas. 41. SEM internal view of the raphe valve. 42, 43. SEM external view of the rapheless valves showing striation pattern, axial and central areas. 44. SEM internal view of the rapheless valve. LM scale bar = 10 μm. SEM scale bars indicated in each figure.