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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Dytiscinae » Aciliini » Thermonectus

Genus Thermonectus

Diving water bug - Thermonectus nigrofasciatus Beetle - Thermonectus basillaris Thermonectus ornaticollis - Thermonectus nigrofasciatus Thermonectus nigrofasciatus? - Thermonectus nigrofasciatus Diving Beetle - Thermonectus basillaris - male Thermonectus marmoratus Arizona Beetle - Thermonectus marmoratus Male, sunburst diving beetle? - Thermonectus marmoratus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Dytiscinae
Tribe Aciliini
Genus Thermonectus
Explanation of Names
Thermonectus Dejean 1833
Numbers
6 spp. in our area, 20 total(1)(2)
Size
7.5-14 mm(3)
Identification
elytron densely punctate but punctures fine and inconspiciuous, AND mesofemur with hind margin setae longer than width of femur(4)
Range
New World, mainly warm temperate to tropical; T. basilaris strays as far north as so. ON(3)
Habitat
Mostly in ponds, both permanent and vernal; 2 spp. in desert streams; come to lights(3)
Life Cycle
adults reported to overwinter on land, breeding in late spring to early summer, larvae develop quickly over the summer, especially in desert regions(3). Newly emerged adults disperse to overwintering sites in late summer and into the fall.
Works Cited
1.A World Catalogue of the Family Dytiscidae, or the Diving Beetles (Coleoptera, Adephaga)
Nilsson and Hajek. 2019. Distributed by authors.
2.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.
3.Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska
D.J. Larson, Y. Alarie, and R.E. Roughley. 2001. NRC 43253.
4.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.
Contributed by Sean McCann on 28 August, 2006 - 3:09pm
Additional contributions by Robin McLeod, Mike Quinn, Tim Moyer, t.loh, v belov
Last updated 5 June, 2023 - 5:16pm

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