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

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 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

Previous events


Genus Hydrocanthus

Ѣєєҭᶅє - Hydrocanthus Dytiscid - Hydrocanthus iricolor Burrowing Water Beetle - Hydrocanthus iricolor Noteridae - Hydrocanthus 9048499 diver - Hydrocanthus Hydrocanthus regius? - Hydrocanthus regius Pennsylvania Beetle  - Hydrocanthus iricolor tiny aquatic critter - Hydrocanthus iricolor
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Noteridae (Burrowing Water Beetles)
Genus Hydrocanthus
Explanation of Names
Hydrocanthus Say 1823
5-6 spp. in 2 subgenera in our area(1)(2), >50 total(3)
See (4)(2)(5)
e. N. Amer. to S. Amer. / W. Indies - Map (1)(2)(6)(GBIF)
The Illinois Natural History Survey website, citing several articles from the primary literature on this genus, indicates that we can assume Hydrocanthus in the northeast (roughly from Maryland north, and east of the Appalachians) to be H. iricolor until proven otherwise. The distributions (north of Mexico) of each species as given there:

H. iricolor - Eastern North America from Maine and Ontario to Michigan, northern Indiana, and south to South Carolina and Georgia
H. atripennis - southern Canada west of the Appalachians ... north to southern Illinois and southern Indiana; rare eastward in Florida ... north to the Carolinas
H. oblongus - Gulf and Atlantic coastal plains from Texas to the Carolinas
H. regius - Florida and Georgia
H. debilis - Texas
Internet References
Hydrocanthus at the Illinois Natural History Survey
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.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.
3.Nilsson A.N. (2006) A world catalogue of the family Noteridae, or the burrowing water beetles (Coleoptera, Adephaga)
4.A key to the American species of Hydrocanthus with descriptions of new taxa (Coleoptera: Noteridae)
Frank N. Young. 1985. Proceedings of the Academy of Natural Sciences of Philadelphia, 137(1): 90-98.
5.Water Beetles of South Carolina
Janet Ciegler. 2003. Clemson University.
6.Bousquet Y., ed. (1991) Checklist of the beetles of Canada and Alaska