Philopatric
Guides
Graphoderus
Graphoderus is a genus of predaceous diving beetles in the family Dytiscidae, comprising 12 extant species and 2 extinct species known from fossils. The genus is native to the Holarctic region, with species distributed across Europe, North America, and parts of Asia. Several species are of conservation concern, particularly G. bilineatus, which is listed in Annexes II and IV of the European Habitats Directive and has experienced significant population declines across its range.