Hannaea inaequidentata, SEM 40–43 frustule details showing open girdle bands, note row of poroids interrupted at centre (42 arrow; also see Fig. 46, arrow) 44 valve with complete valvocopula 45–47 details of Fig. 44 showing open valvocopula (45 arrow), sawtooth-shaped projections attached to valve, internally visible over each virga (46 arrows; also see Fig. 41, arrows). Scale bars: 10 μm (40, 44), 2 μm (41–43, 45–47).