FIGURES 60–64 in Examination of type specimens for the genera Odontella and Zygoceros (Bacillariophyceae) with evidence for the new family Odontellaceae and a description of three new genera

FIGURES 60–64. Odontella aurita (Lyngbye) C.A. Agardh, (Breskens Creek, Netherlands). Fig. 60. Frustule with broad triangular elevations with ocelli at apices, raised valve centre and indented valve mantle; scale bar = 10 μm. Fig. 61. Valve face merging into rounded mantle indented at base meeting expanded hyaline valve margin with raised border; valve centre raised with 2 (1 fractured) transapically aligned spines, the openings of rimoportulae, on slopes of central area; scale bar = 10 μm. Fig. 62. Open girdle bands with hyaline abvalvar margins and vertical rows of poroid areolae; scale bar = 5 μm. Fig. 63. Detail of poroid areolae, mostly occluded by cribra with occasional specialised pore (arrow); scale bar = 2 μm. Fig. 64. Valve interior with radial rows of poroid areolae and internal openings of two rimoportulae; scale bar = 10 μm.