FIGURES 62–68 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences

FIGURES 62–68. Neidium collare sp. nov. SEM, internal view. Fig. 62. Whole valve. Figs 63, 67. Recessed areolae and longitudinal canals at mid-valve and close to apex. Figs 65, 66. Central area with offset forming interconnected helictoglossae. Very weak surface depressions (ghost striae) present in the central area. Remnants of renilimbia present (arrows). Fig. 64. Apex showing an erect helictoglossa at terminal nodule and single longitudinal canal extending to the apex. Fig. 68. broken valve showing the canal. Scale bars: 20 μm: Fig. 62; 5 μm: Figs 64, 65; 3 μm: Figs 63, 66, 67; 1 μm: Figs 68.