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Genus Hydaticus

Predacious Diving Beetle - Hydaticus cinctipennis Predaceous Diving Beetle - Hydaticus aruspex - male Brown And Black Beetle - Hydaticus aruspex Hydaticus aruspex - female Dytiscid - Hydaticus aruspex Beetle - Hydaticus aruspex - male Beetle - Hydaticus aruspex - male Aquatic beetle - Hydaticus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Dytiscinae
Tribe Hydaticini
Genus Hydaticus
Explanation of Names
Hydaticus Leach (1817)
3 spp. in our area, 7 spp. total(1)
11-15.4 mm(2)
Key to NA species in(2)
holarctic: 2 spp. in e. NA, H. aruspex is holarctic (transcontinental in NA), and 4 spp. restricted to the Palaearctic region(1)
Densely vegetated areas of ponds and eutrophic lakes(2)
all year round but most adults encountered from spring through fall
Life Cycle
Northern species generally overwinter as adults and mate in the spring; larvae complete development by early summer and emergent adults disperse to overwintering sites later in the season(2)
See Also
Works Cited
1.Phylogeny and classification of the tribe Hydaticini (Coleoptera: Dytiscidae)...
Miller K.B., Bergsten J., Whiting M.F. 2009. Zoologica Scripta, 1-25.
2.Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska
D.J. Larson, Y. Alarie, and R.E. Roughley. 2001. NRC 43253.