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Genus Peltodytes

Tiny Round Thing - Peltodytes Crawling Water Beetle - Peltodytes muticus Peltodytes sp. - Peltodytes edentulus Crawling Water Beetle Larva - Peltodytes Peltodytes sexmaculatus Roberts - Peltodytes sexmaculatus Crawling Water Beetle - Peltodytes tortulosus Peltodytes edentulus Haliplidae, Peltodytes simplex? - Peltodytes simplex
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)
Genus Peltodytes
Synonyms and other taxonomic changes
our spp. are members of the subgen. Neopeltodytes Satô 1963(1)
Explanation of Names
Peltodytes Régimbart 1878
16 spp. in our area(2), ~30 spp. total(3); selected local faunas: 6 spp. in Canada(4), 8 in FL(5), 2 in CA(6), 9 in NH(7), 6 in MI(8)
3-4 mm
adults have two black spots on posterior margin of pronotum (no such spots in Haliplus)(1)
Key to spp. in (2)
Key to adults by W.U. Brigham (outdated)
worldwide except Australia and S. America(3); most of NA(1)
usually in dense mats of vegetation and algae along the margins of ponds/lakes or slow-running waters, often in association with Haliplus(5)
adults: year-round; larvae: spring
larvae feed entirely on algae; adults feed on aquatic worms, small crustaceans, hydrozoans, midge eggs, and algae
Life Cycle
overwinters as an adult in permanent standing water
adults come to lights
Print References
Jasper S.K. (1996) Peltodytes species new to Texas, with habitat notes (Coleoptera, Haliplidae). Entomologica Basiliensia 19: 19-30.
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.Revision of the Nearctic Haliplidae (Coleoptera)
van Vondel B.J. 2021. Tijdschr. Entomol. 163: 101-298.
3.Keys to the insects of the Far East of the USSR, Vol. 3. Coleoptera I
Lehr P.A., ed. 1989. Leningrad, Nauka Publishing House, 572 pp.
4.Bousquet Y., ed. (1991) Checklist of the beetles of Canada and Alaska
5.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.
6.California Beetle Project
7.University of New Hampshire Insect and Arachnid Collections
8.Bright E. (2002-2011) Aquatic Insects of Michigan