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Species Arrenodes minutus - Oak Timberworm

Oak Timberworm - Arrenodes minutus - male Oak Timberworm Beetle - Arrenodes minutus - female Oak Timberworm Arrhenodes minutus   - Arrenodes minutus - male Oak Timberworm - Arrenodes minutus - female Oak Timberworm - Arrenodes minutus - female Oak Timberworm - Arrenodes minutus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea
Family Brentidae (Primitive Weevils)
Subfamily Brentinae
Tribe Brentini
Genus Arrenodes
Species minutus (Oak Timberworm)
Synonyms and other taxonomic changes
Arrhenodes minutus, A. minuta
Explanation of Names
Arrenodes minutus (Drury 1770)
♀7-14 mm, ♂7-22 mm(1)
snout is broad in males, long & narrow in females
e NA (NS-FL to ON-ND-TX) - Map (2)(3)(4)(5)
Deciduous forests, under bark (esp. of oaks)(2)
mostly: May-Aug (BG data)
Life Cycle
Females lay eggs in living trees where sapwood exposed by injury; larvae bore into wood beneath(1)

Females lay 1 egg at a time, drilling a hole for each. This is a pain staking process and can take several hours. Male jaws are not designed for drilling but they have been known to stand guard while the female drills.(6)
Larva take 2-3 years to develop. Pupation in gallery near exit(7)
Males are territorial and guard egg-laying females(2)
comes to lights
Works Cited
1.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.
2.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
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.
4. A distributional checklist of the beetles (Coleoptera) of Florida.
Peck & Thomas. 1998. Florida Department of Agriculture and Consumer Services, Gainesville. 180 pp.
5.Global Biodiversity Information Facility (GBIF)
6.Hidden Company that Trees Keep: Life from Treetops to Root Tips
James B. Nardi. 2023. Princeton University Press.
7.Beetles of Eastern North America
Arthur V. Evans. 2014. Princeton University Press.