Boxplots with the variation in PL/TL (a) and PW/PL (b). Ratios for G. elatus and G. perplexus in penis length over total body length (PL/TL) and penis width over penis length (PW/PL), the box represents median ± 25% and whiskers show minimum and maximum values.

  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.