FIGURES 75–78 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences

FIGURES 75–78. Neidium lavoieanum sp. nov. SEM, external view. Fig. 75. Half valve. Fig. 76. Surface areolae with no occlusions and axial area mid-way along the valve. Fig. 77. Elevated central area with elongated areolae along the margin and recurved proximal raphe endings. Fig. 78. Apex showing lacinia and longitudinal canals extending to the apex. Scale bars = 10 μm: Fig. 75; 3 μm: Figs 76–78.