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Family Haliplidae - Crawling Water Beetles

Twelve-Spotted Crawling Water Beetle - Peltodytes duodecimpunctatus Crawling Water Beetle - Haliplus fasciatus Crawling Water Beetle - Peltodytes pedunctulatus Haliplus stagninus Leech - Haliplus stagninus Crawling Water Beetle - Haliplus triopsis - male Peltodytes edentulus? - Peltodytes edentulus crawling water beetle - Peltodytes shermani Peltodytes edentulus? - Peltodytes edentulus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Haliplidae (Crawling Water Beetles)
Synonyms and other taxonomic changes
revised in (1)
Explanation of Names
Haliplidae Aubé 1836
60 spp. in 3 genera in our area, ~240 spp. in 4 genera total(1)
1.5-5 mm(2)
key to spp. in (1); local keys: e Canada(3), CO(4), FL(5)
worldwide, primarily Holarctic(3)(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.Haliplidae of Eastern Canada
H.V. Ashbee, S.A. Marshall, Y. Alarie. Canadian Journal of Arthropod Identification 32: 1-80, 2017.
4.Colorado Haliplidae (Coleoptera): biogeography and identification
Durfee R., Jasper S.H., Kondriateff B.C. 2005. J. Kans. Ent. Soc. 78: 41-70.
5.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.