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Species Gibbium aequinoctiale - Smooth Spider Beetle

Unidentified Insect - Gibbium aequinoctiale Help!  - Gibbium aequinoctiale Spider Beetle_MG_8403 - Gibbium aequinoctiale Tiny brownish-red insect - Gibbium aequinoctiale Gibbium aequinoctiale ? - Gibbium aequinoctiale Found near my bed, please help! - Gibbium aequinoctiale Found near my bed, please help! - Gibbium aequinoctiale Gibbium aequinoctiale ? - 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)
Tribe Gibbiini
Genus Gibbium
Species aequinoctiale (Smooth Spider Beetle)
Synonyms and other taxonomic changes
References to Gibbium psylloides outside the Old World are most likely to this species
Explanation of Names
Gibbium aequinoctiale Boieldieu 1854
2.1–2.7 mm(1)
Elytra fused and inflated, completely glabrous (smooth). Can only be confused with Mezium, but pronotum distinctive.
often confused with G. psylloides(1)
Cosmopolitan but more common in warm climes(2), and very few records in Europe; origin unknown ("tropical, subtropical"); found in stored goods across NA(3)(1)
Mainly houses, flour mills, occasionally warehouses, hospitals, stores(2)
wide variety of dead organic materials; may be a dry stored product pest
has a remarkable ability to avoid drying out and can withstand temperatures as high as 56°C (133°F) (Yoder et al. 2009)
Internet References
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.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.
3.Coleoptera families other than Cerambycidae, Curculionidae sensu lato, Chrysomelidae sensu lato and Coccinelidae -- Chapter 8.5
Denux O., Zagatti P. 2010. BioRisk 4: 315–406.