Children (14 direct children, 14 direct and indirect children):
Hydrobius fuscipes
Hydrobius tumidus
Hydrobius melaenus
Hydrobius arcticus
Hydrobius convexus
Hydrobius orientalis
Hydrobius pauper
Hydrobius pui
Hydrobius punctistriatus
Hydrobius melaenum
Hydrobius rottenbergii
Hydrobius subrotundus
Hydrobius argentinus
Hydrobius dorsalis