Rimoportulae in Ulnaria, internal view, SEM A U. hupingensis sp. nov. B U. oxybiseriata C U. jishou-biseriata sp. nov D U. pandurata-biseriata sp. nov. Scale bars: 1 μm (A–D).

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