Comparative external views of shell valves of unionids studied: A Chamberlainia hainesiana B Hyriopsis bialatus C Scabies crispata D Pseudodon mouhoti E Ensidens ingallsianus F Physunio inornatus G Trapezoideus exolescens.

 
 
  Part of: Kongim B, Sutcharit C, Panha S (2015) Cytotaxonomy of unionid freshwater mussels (Unionoida, Unionidae) from northeastern Thailand with description of a new species. ZooKeys 514: 93-110. https://doi.org/10.3897/zookeys.514.8977