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For Insects, Spiders & Their Kin
For the United States & Canada
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Discussion of 2018 gathering

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

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Subfamily Ptininae - Spider Beetles

Ptinus Ptinus? - Ptinus californicus In the firewood stack - Ptinus fur - female Shiny Spider Beetle - Mezium affine Meat Beetle 2 - Ptinus fur Spider Beetle - Ptinus Ptinus latro - male Gibbium sp.? - Gibbium aequinoctiale
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)
Synonyms and other taxonomic changes
many workers treat Gibbium and Mezium in a separate subfamily, Gibbiinae(1)
Explanation of Names
Ptininae Latreille 1802
~70 spp. in 12 genera in our area(2)(3), 15 in Canada(4) (ca. 600 spp. worldwide)
1.5–4.5 mm(5)
Body constricted between prothorax and elytra, pronotum often with humps, elytra often with shoulders reduced (flightless species). Head not retracted below pronotum, antennae free, filiform, their bases proximate.
illustrated keys & info on species that occur indoors in(4)(3)
worldwide and across NA; many spp. associated with stored products easily spread with commerce and have cosmopolitan distribution
mammal/bird/bee nests, dry carrion, tree holes; several species occur in homes, granaries, mills, warehouses(4)
Dry plant and animal matter (a few are wood-borers as larvae)
See Also
Print References
Philips T.K. (2000) Phylogenetic analysis of the New World Ptininae (Coleoptera: Bostrichoidea). Systematic Entomology 25: 235-262.
Internet References
Works Cited Jong Y.S.D.M. (ed.) (2011) Fauna Europaea version 2.4
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.An illustrated and descriptive catalogue of the Ptinidae of North Amerika.
Papp, C.S. 1962. Deutsche Entomologische Zeitschrift, 9(5): 367-423.
4.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.
5.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.
6.Eifler M.