Hannaea cf. arcus and Hannaea cf. baicalensis, LM 1–7 seven valves showing valve size diminution series for Hannaea cf. arcus 8, 9 two valves of Hannaea cf. baicalensis. Scale bar: 10 μm (1, 8).

 
 
  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