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Genus Helophorus

flood debris #5 - Helophorus - Helophorus lineatus Water Scavenger Beetle - Helophorus grandis Water Scavenger Beetle - Helophorus orientalis Hydrophilidae - Helophorus Hydrophilidae - Helophorus Water Beetle - Helophorus lineatus - male Marsh Beetles - Helophorus - male - female Helophorus? - Helophorus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Staphyliniformia)
Superfamily Hydrophiloidea (Water Scavenger and Clown Beetles)
Family Hydrophilidae (Water Scavenger Beetles)
Subfamily Helophorinae
Genus Helophorus
Explanation of Names
Helophorus Fabricius 1775
Numbers
43 spp. in 5 subgenera in our area(1), all but a handful in the subg. Rhopalohelophorus; Eurasia has at least twice that many spp.
Identification
adults have 5 longitudinal grooves in the pronotum
Range
holarctic; in our area, mostly northern and western, with 27 spp. in Canada (of which 8 holarctic) and just 3 spp. in se. US (only H. lineatus in FL)(2)(3)
Habitat
on or around submerged or emergent vegetation in standing or slow-moving water
Life Cycle
adults come to lights
Remarks
Adults accumulate an exterior crust that must be removed before surface features can be observed(2)
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.Checklist of beetles (Coleoptera) of Canada and Alaska. Second edition
Bousquet Y., Bouchard P., Davies A.E., Sikes D.S. 2013. ZooKeys 360: 1–402.