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Family Haliplidae - Crawling Water Beetles

Haliplus salmo (Wallis) - Haliplus salmo - male Peltodytes edentulus? - Peltodytes edentulus Oregon Haliplidae - Peltodytes callosus Peltodytes callosus? - Peltodytes callosus Haliplidae, Peltodytes simplex? - Peltodytes simplex Haliplid Apteraliplus parvulus  - Apteraliplus parvulus Haliplus sp. - Haliplus Crawling Water Beetle - Peltodytes duodecimpunctatus
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)
Synonyms and other taxonomic changes
revised in (1)
Explanation of Names
Haliplidae Aubé 1836
~70 spp. in 4 genera in our area, ~220 spp. in 5 genera total(2)(3)
1.5-5 mm(2)
key to spp. in (1)
Keys to spp.: e Canada(4), CO(5), FL(6)
worldwide, primarily Holarctic(4)(2)
aquatic, prefer 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
overwinter as adults in permanent standing water
adults periodically come to the surface for air, which is stored in bubbles under the wings, at the tail, and under the coxal plates - allowing the beetle to breathe underwater for long periods; adults swim slowly and clumsily by moving their legs alternately (rather than in unison like predaceous diving beetles do)
Print References
Jasper S.K. (1996) Habitat selection in the family Haliplidae (Coleoptera) in central Texas, east of the Colorado River. Ph.D. dissertation. Texas A&M U., College Station. 306 pp.
Works Cited
1.Revision of the Nearctic Haliplidae (Coleoptera)
van Vondel B.J. 2021. Tijdschr. Entomol. 163: 101-298.
2.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.
3.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.
4.Haliplidae of Eastern Canada
H.V. Ashbee, S.A. Marshall, Y. Alarie. Canadian Journal of Arthropod Identification 32: 1-80, 2017.
5.Colorado Haliplidae (Coleoptera): biogeography and identification
Durfee R., Jasper S.H., Kondriateff B.C. 2005. J. Kans. Ent. Soc. 78: 41-70.
6.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.