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Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

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Genus Berosus

Water Scavenger Beetle - Berosus Berosus youngi (Wooldridge) - Berosus youngi 916W07 - Berosus exiguus Berosus? - Berosus water beetle - Berosus Berosus Berosus salvini - male Male, Berosus salvini - Berosus salvini - male
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 Hydrophilinae
Tribe Berosini
Genus Berosus
Explanation of Names
Berosus Leach 1817
17 spp. in our area(1), 6 in Canada(2), >260 worldwide
Adult: lateral outline of pronotum forms discontinuous line with elytra; pronotum and elytra with dark marks or spots; 2nd and 3rd pair of legs with swimming hairs on tibia; ventral surface relatively smooth between legs, lacking long keel or spine(3); shape of elytral apices important for species determination
Larva: light brown with darker brown markings; body elongate, with pointed tail and long lateral filamentous gills on abdomen
most of the world and NA, including the arctic
among submergent vegetation in ponds or edges of slow-moving portions of streams; adults come to light
larvae present in spring; adults present year-round in water that doesn't freeze
larvae prey on small aquatic invertebrates
adults are unusual in that they can breath underwater, absorbing oxygen from the water through their body surface(3)
Internet References
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.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.
3.Digital key to aquatic insects of North Dakota