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Species Sitophilus zeamais - Maize weevil

Sitophilus zeamais - male Dryophthorine weevil - Sitophilus zeamais Dryophthorine weevil - Sitophilus zeamais BG2379 E9171 - Sitophilus zeamais oryzae or zeamais - Sitophilus zeamais Weevil - Sitophilus zeamais Weevil - Sitophilus zeamais Weevil - Sitophilus zeamais
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 Curculionoidea (Snout and Bark Beetles)
Family Curculionidae (Snout and Bark Beetles)
Subfamily Dryophthorinae
Tribe Rhynchophorini
Genus Sitophilus (Granary Weevils)
Species zeamais (Maize weevil)
Explanation of Names
Sitophilus zeamais Motschulsky 1855
ca. 4 mm(1)
externally, almost indistinguishable from, and often confused with, S. oryzae (only male genitalia provide reliable diagnostic features), although tends to be larger and darker(2); the two may form mixed infestations(3)
native range unknown(4), now cosmopolitan in warmer climes; in our area, recorded across the US but not established in Canada (unlike S. oryzae)(2)
Life Cycle
a common pest of grain crops in tropical regions worldwide; adults fly from granaries to fields to start infestations that continue in storage(1)
Works Cited
1.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.
2.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.
3.Insect and Mite Pests in Food, an Illustrated Key
J. Richard Gorham, editor. 1991. United States Department of Agriculture Handbook 655.
4.Alien terrestrial arthropods of Europe
Roques A., Kenis M., Lees D., Lopez-Vaamonde C., Rabitsch W., Rasplus J.-Y., Roy D., eds. 2010. BioRisk 4 Special Issue; 2 vols., 1028 pp.