Hannaea cf. baicalensis, SEM. 22 complete valve, internal view, note rimoportula at each pole 23–28 detail of valve structure. Scale bars: 10 μm (22), 2 μm (23–28).

 
 
  Part of: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136