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

National Moth Week photos of insects and people. Here's how to add your images.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Species Xylosandrus crassiusculus - Asian Ambrosia Beetle

Bark beetle - Xylosandrus crassiusculus Bark Beetle - Xylosandrus crassiusculus scoly - Xylosandrus crassiusculus Asian Ambrosia Beetle - Xylosandrus crassiusculus Ambrosiodmus sp. - Xylosandrus crassiusculus Ambrosiodmus sp. - Xylosandrus crassiusculus Small, reddish bark beetle - Xylosandrus crassiusculus Xylosandrus crassiusculus? - Xylosandrus crassiusculus
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 Scolytini (Typical Bark Beetles)
Subtribe Xyleborina
Genus Xylosandrus
Species crassiusculus (Asian Ambrosia Beetle)
Other Common Names
Granulate Ambrosia Beetle(1)
Explanation of Names
Xylosandrus crassiusculus (Motschulsky 1866)
♀ 2.1-2.9 mm, ♂ 1.5 mm
native to E. Asia(2), adventive elsewhere, spreads by timber trade(1); in our area, e. US (MA-FL to MI-NE-TX) & ON(3)(2)
trapped most frequently during the spring [cite:185010]
polyphagous; hosts include members of 46 families (3)
Life Cycle
beetles attack the tree trunk and push the frass out of galleries in a distinctive toothpick fashion [cite:185010]
earliest record in our area: SC 1974(4)
Internet References
Featured Creatures - Atkinson et al. 2012
Works Cited
1.Alien terrestrial arthropods of Europe
Roques A., Kenis M., Lees D., Lopez-Vaamonde C., Rabitsch W., Rasplus J.-Y., Roy D., eds. 2010. BioRisk 4 Special Issue; 2 vols., 1028 pp.
2.New Curculionoidea (Coleoptera) records for Canada
Douglas H., Bouchard P., Anderson R.S., de Tonnancour P., Vigneault R., Webster R.P. 2013. ZooKeys 309: 13–48.
3.Atkinson T.H. (200_-2018) Bark and ambrosia beetles
4.Exotic bark and ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) in the United States: potential and current invaders
Haack R.A., Rabaglia R.J. 2013. In: Potential invasive pests of agricultural crops. Peña J.E., ed. CABI International, Wallingford, UK, pp. 48-74.