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Genus Sitophilus - Granary Weevils

Coleoptera - Sitophilus oryzae Granary Weevil - Sitophilus BG2379 E9171 - Sitophilus zeamais beetle - Sitophilus Weevil, Bar Harbor, Maine Jan26 - Sitophilus Tiny Weevil  - Sitophilus zeamais unknown weevil - Sitophilus oryzae Sitophilus
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)
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea (Snout and Bark Beetles)
Family Curculionidae (Snout and Bark Beetles)
Subfamily Dryophthorinae
Tribe Rhynchophorini
Genus Sitophilus (Granary Weevils)
Explanation of Names
Sitophilus Schönherr 1838
Greek sitos (σιτος) 'grain' + philos (φιλος) 'loving'(1)
Numbers
5 spp. in our area, all adventive(2)
Size
2-5 mm
Identification
S. oryzae and S. zeamais, the two cosmopolitan spp. with maculate elytra, may be very hard to tell apart, and may form mixed infestations; S. oryzae are often smaller & paler than S. zeamais(3)
Range
worldwide and throughout NA(2)
Habitat
mostly indoors, but may infest grain in the field(3)
Food
They attack wheat, corn, oats, rye, barley, sorghum, buckwheat, dried beans, cashew nuts, wild bird seed, and cereal products, especially macaroni. - UFL
Life Cycle
Adults may live four to five months - UFL
Remarks
S. granarius (Grain Weevil), S. oryzae (Rice Weevil), and S. zeamais (Maize Weevil) are serious stored product pests(2); S. linearis (Tamarind Weevil) is a serious pest of tamarind in the Caribbean and se. US (FL, LA)(4)
n. India has more described species of Sitophilus that any other part of the world; most develop on acorns and are rather large (the small size of the current grain-feeding spp. may be a result of recent adaptation)(5)
Works Cited
1.Composition of scientific words
Brown R.W. 1956. Smithsonian Institution Press, Washington, DC. 882 pp.
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.Insect and Mite Pests in Food, an Illustrated Key
J. Richard Gorham, editor. 1991. United States Department of Agriculture Handbook 655.
4.Haseeb M., O'Brien C.W., Kairo M.T.K. (2010) Potentially invasive weevil species from the Caribbean countries to the US...
5.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.