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Subfamily Ptininae - Spider Beetles

Niptus sp. - Niptus ventriculus Tiny brownish-red insect - Gibbium aequinoctiale In the firewood stack - Ptinus fur - female In the firewood stack - Ptinus fur - female Ptinidae - Ptinus Ptinus? - Ptinus Eastern Spider Beetle - Ptinus raptor Belden-1
Classification
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
Numbers
~70 spp. in 12 genera in our area(2)(3), 15 in Canada(4) (ca. 600 spp. worldwide)
Size
1.5–4.5 mm(5)
Identification
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)
Range
worldwide and across NA; many spp. associated with stored products easily spread with commerce and have cosmopolitan distribution
Habitat
mammal/bird/bee nests, dry carrion, tree holes; several species occur in homes, granaries, mills, warehouses(4)
Food
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
(6)
Works Cited
1.de 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. www.ptinidae.de