Valvocopula of Ulnaria ulnabiseriata, SEM. Scale bar: 20 μm (A); 5 μm (B–F).

 
 
  Part of: Liu B (2023) The diatom genus Ulnaria (Bacillariophyta) in China. PhytoKeys 228: 1-118. https://doi.org/10.3897/phytokeys.228.101080