GraphoderusGraphoderus is a genus of beetle in family Dytiscidae native to the Holarctic.Extant speciesThe genus Graphoderus contains the following 12 species:Graphoderus adamsii Graphoderus austriacus Graphoderus bieneri Zimmermann, 1921Graphoderus bilineatus Graphoderus cinereus Graphoderus elatus Sharp, 1882Graphoderus fascicollis Graphoderus liberus Graphoderus manitobensis Wallis, 1933Graphoderus occidentalis Horn, 1883Graphoderus perplexus Sharp, 1882 ''Graphoderus zonatus''Extinct speciesThese two extinct species are known only from fossils: †Graphoderus heeri Nilsson, 2001 †Graphoderus mirabilis Riha, 1974