Ventral view showing meso- and metathorax of G. bieneri (a) and G. cinereus (b). To indicate the relative distances between the mesocoxae (1) and the meso- and metacoxae (2).

  Part of: Holmgren S, Angus R, Jia F, Chen Z-n, Bergsten J (2016) Resolving the taxonomic conundrum in Graphoderus of the east Palearctic with a key to all species (Coleoptera, Dytiscidae). ZooKeys 574: 113-142.