Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Family Haliplidae - Crawling Water Beetles

Haliplus Crawling Water Beetle - Peltodytes edentulus water beetle - Haliplus Haliplus robertsi (Zimmermann) - Haliplus robertsi Haliplus fasciatus? - Haliplus fasciatus Grass Lake Haliplid 2 - Peltodytes - Peltodytes callosus Peltodytes callosus? - Peltodytes callosus Haliplus dorsomaculatus?
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Haliplidae (Crawling Water Beetles)
Explanation of Names
Haliplidae Aubé 1836
~70 spp. in 4 genera in our area, ~220 spp. in 5 genera worldwide(1)(2)
1.5-5 mm(1)
body convex dorsally, broadly oval or boat-shaped (with pointed posterior) and brownish or reddish-yellow with dark spots; hind coxae very long, flat, and broad, covering much of the ventral surface of the abdomen - but this feature is not visible in dorsal photos
worldwide, more common in temperate regions(1)
larvae and adults are aquatic, preferring standing water such as large ponds that have no shade and plentiful algae
adults year-round, larvae: spring
larvae feed entirely on algae, either the filamentous forms such as Spirogyra, or macroalgae such as Chara
adults feed on oligochaet worms, small crustaceans, hydrozoans, the eggs of midges, and algae
Life Cycle
overwinters as an adult in permanent standing water
adults periodically come to the water surface for air; atmospheric oxygen is captured in bubbles and stored in three places - under the wings, at the tail, and under the large coxal plates - allowing the beetle to breathe underwater for long periods
adults swim slowly and clumsily by "shuffling" (moving their legs alternately, rather than in unison like predaceous diving beetles do)
Internet References
family page (Beutel et al. 2011)
Works Cited
1.American Beetles, Volume I: Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia
Arnett, R.H., Jr., and M. C. Thomas. (eds.). 2000. CRC Press LLC, Boca Raton, FL.
2.Order Coleoptera Linnaeus, 1758. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
Ślipiński S.A., Leschen R.A.B., Lawrence J.F. 2011. Zootaxa 3148: 203–208.