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Male genitalia of Hydrobius morphotypes in lateral view. A H. arcticus B H. fuscipes rottenbergii C H. f. fuscipes D H. f. subrotundus. |
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| Part of: Fossen EI, Ekrem T, Nilsson AN, Bergsten J (2016) Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). ZooKeys 564: 71-120. https://doi.org/10.3897/zookeys.564.6558 |