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

Species Ptinus villiger - Hairy Spider Beetle

Spider Beetle - Ptinus villiger - male Ptinus raptor? - Ptinus villiger - male Ptinus - Ptinus villiger - female Ptinus ? - Ptinus villiger
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)
Superfamily Bostrichoidea (Carpet, Powder-post and Death-watch Beetles)
Family Ptinidae (Death-watch and Spider Beetles)
Subfamily Ptininae (Spider Beetles)
Tribe Ptinini
Genus Ptinus
No Taxon (subgenus Ptinus)
Species villiger (Hairy Spider Beetle)
Explanation of Names
Ptinus villiger (Reitter 1884)
♂♂ 2.2–3.1 mm, ♀♀ 2.8–3.6 mm(1)
native to, and widespread in, n. Eurasia(2), adventive in NA; transcontinental in Canada & n. US (south to PA-NE-WA)(3)
in Canada, one of the most common ptinids and a serious pest of cereal products (esp. damp grain) and animal feed(3)
earliest NA record: USA 1905(4)
Works Cited
1.Death-watch and spider beetles of Wisconsin—Coleoptera: Ptinidae
Arango, R.A. and D.K. Young. 2012. General Technical Report FPL-GTR-209. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.
2.Coleoptera Poloniae
3.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.
4.The Derodontidae, Dermestidae, Bostrichidae, and Anobiidae of the Maritime Provinces of Canada (Coleoptera: Bostrichiformia)
C.J. Majka. 2007. Zootaxa 1573: 1–38.