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

Calendar

TaxonomyBrowse
Info
ImagesLinksBooksData

Genus Thermonectus

Thermonectus marmoratus Thermonectus basillaris (Harris) - Thermonectus basillaris - male Thermonectus basillaris Thermonectus nigrofasciatus? - Thermonectus nigrofasciatus 1001C36 - Thermonectus basillaris 2018-07-28 Pale-edged predaceous diver - Thermonectus basillaris Thermonectus basillaris? - Thermonectus basillaris Thermonectus intermedius - 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.