Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Giving Tuesday

Do you use BugGuide? Please consider a monetary gift on this Giving Tuesday.

Your donation to BugGuide is tax-deductible.

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

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


Genus Xyleborinus

X. saxesenii - Xyleborinus saxesenii Xyleborinus saxeseni - Xyleborinus saxesenii - male Bark Beetle - Xyleborinus saxesenii Bostrichidae - Xyleborinus saxesenii Modesto2 6 - Xyleborinus saxesenii Curculionoidea – Curculionidae – Bark and Ambrosia Beetles - Scolytinae – Xyleborini - Xyleborinus attenuatus Curculionoidea – Curculionidae – Bark and Ambrosia Beetles - Scolytinae – Xyloborini – Fruit-tree Pinhole Borer  - Xyleborinus saxesenii Belden-J.2021.82 - Xyleborinus saxesenii
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 Cucujiformia)
Superfamily Curculionoidea (Snout and Bark Beetles)
Family Curculionidae (Snout and Bark Beetles)
Subfamily Scolytinae (Bark and Ambrosia Beetles)
Tribe Xyleborini
Genus Xyleborinus
Synonyms and other taxonomic changes
was often treated as a subgenus or synonym of Xyleborus(1)
Explanation of Names
Xyleborinus Reitter 1913
5 spp. (of which 3 adventive) in our area, ~80 total(2)
males dwarfed and flightless, females 1.4–3.5 mm(3)
key to spp. in (2)
also helpful is key to entire tribe in (4)

distinguished from other Xyleborini genera by the projecting, conical scutellum as seen below
worldwide & across NA(1)(3)
attack limbs & boles of weakened trees(1)
Internet References
Works Cited
1.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.
2.First records of Xyleborinus octiesdentatus (Murayama) (Coleoptera, Curculionidae, Scolytinae) from North America
Rabaglia R.J., Knížek M.,Johnson W. 2010. Zookeys 56: 219–226.
3.Mercado J.E. (2011) Bark beetle genera of the United States
4.North American Xyleborini north of Mexico: a review and key to genera and species (Coleoptera, Curculionidae, Scolytinae)
Demian F. Gomez, Robert J. Rabaglia, Katherine E. O. Fairbanks, Jiri Hulcr. 2018. ZooKeys 768: 19-68.