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For the United States & Canada
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Upcoming Events

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

National Moth Week was July 23-31, 2022! See moth submissions.

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

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

Photos of 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

Previous events


Family Aradidae - Flat Bugs

nymph - Aradus Flat Bug - Neuroctenus simplex A flat bug - Mezira lobata - female Unknown Bug - Aradus insolitus Black Plant Bug? - Neuroctenus pseudonymus Neuroctenus Flat Bug (Aradus sp.) - Aradus robustus Hemipteran - Aradus robustus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Pentatomomorpha
Family Aradidae (Flat Bugs)
~130 spp. (>⅔ of which are in Aradus) in 13 genera in our area, arranged in 5 subfamilies(1)(2); close to 2,000 spp. in 230 genera of 8 subfamilies worldwide(3)
Overview of our fauna (* –taxa not yet in the guide)
Subfamily Aradinae Aradus · Quilnus
3-11 mm
Abdomen extends beyond wings. Antennae and beak have four segments. Lack ocelli.
Key to genera and the commonest (mostly ne.) species is provided in (5); to spp. of Canadian fauna, in(6)
Many nw. species imaged at(7)
worldwide; most diverse in Australia(3)
mostly under bark, on fallen logs & tree limbs, bracket fungi; some smaller forms in leaf litter
mycelia or fruiting bodies of wood-rotting fungi(3)
Life Cycle
many bark-dwelling spp. are gregarious(3)
mouthparts "stored" coiled inside the head
Works Cited
1.State records, confirmations, and habitats of Aradidae (Hemiptera: Heteroptera) from Louisiana, U.S.A.
Taylor S.J., Gil S.A. 2009. Fla. Entomol. 92: 199-207.
2.Taylor S. (2002-2011) Aradidae (Flatbugs)
3.Zoological catalogue of Australia: Hemiptera: Heteroptera (Pentatomomorpha)
Cassis G., Gross G.F. 2002. CSIRO Publishing, 751 pp.
4.New Florida and United States Heteropteran records (Hemiptera: Aradidae, Coreidae, Miridae)
Henry T.J., White C.E., Halbert S.E. 2021. Proc. Ent. Soc. Wash. 123: 538-550.
5.How to Know the True Bugs
Slater, James A., and Baranowski, Richard M. 1978. Wm. C. Brown Company.
6.The Aradidae of Canada (Hemiptera: Aradidae)
Matsuda R. 1977. The insects and arachnids of Canada, Pt. 3. Ottawa: Agriculture Canada. 116 pp.
7.Photo gallery of the Spencer Entomological Collection