Figure 10 from: 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. https://doi.org/10.3897/zookeys.574.7002

Figure 10 - Ventral view showing the epipleural width. a–b Graphoderus zonatus c–e Graphoderus perplexus and f–h Graphoderus elatus. Specimens from Sweden (a), France (b), USA (c Lectotype of Graphoderus perplexus), Canada, Quebec (d), Red River Am. Bor. (e paralectotype of Graphoderus elatus), Amurland Russia (f Lectotype Graphoderus elatus), Gangca China (g), "Manchuria" Weymarn coll. (h). The species differ in the epipleural width especially at level of abdominal ventrites I-III.