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Species Gnatocerus cornutus - Broad-horned Flour Beetle

Gnatocerus cornutus - male Gnatocerus cornutus - male Gnatocerus cornutus - female
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 Tenebrionoidea (Fungus, Bark, Darkling and Blister Beetles)
Family Tenebrionidae (Darkling Beetles)
Subfamily Diaperinae
Tribe Diaperini
Subtribe Adelinina
Genus Gnatocerus
Species cornutus (Broad-horned Flour Beetle)
Explanation of Names
Gnatocerus cornutus (Fabricius 1798)
~4 mm(1)
male has broad horns on mandibles(1)
native to the Old World (according to(2), to the Neotropics), spread through commerce and currently cosmopolitan(3)
mainly in flour mills and warehouses (able to survive winter conditions only in heated buildings)(4)
cereal and animal products; larvae will feed on the eggs and injured adults, larvae, and pupae of the Mediterranean flour moth (Anagasta kuehniella)(1)
minor pest of cereal and animal products(4), usually associated with infestations of moths(1); earliest NA record: ca. 1670(3)
Works Cited
1.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.
2.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.
3.The Tenebrionidae (Coleoptera) of the Maritime Provinces of Canada
Majka C.G., Bouchard P., Bousquet Y. 2008. The Canadian Entomologist 140: 690-713.
4.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.