^"Aphrastus Report". Integrated Taxonomic Information System. Retrieved 25 January 2018.
Alonso-Zarazaga, Miguel A., and Christopher H. C. Lyal (1999). A World Catalogue of Families and Genera of Curculionoidea (Insecta: Coleoptera) (Excepting Scotylidae and Platypodidae), 315.
Poole, Robert W., and Patricia Gentili, eds. (1996). "Coleoptera". Nomina Insecta Nearctica: A Check List of the Insects of North America, vol. 1: Coleoptera, Strepsiptera, 41-820.
Further reading
Arnett, R. H. Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). (21 June 2002). American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press LLC, Boca Raton, Florida
ISBN978-0-8493-0954-0.
Ross H. Arnett (30 July 2000). American Insects: A Handbook of the Insects of America North of Mexico. CRC Press.
ISBN978-0-8493-0212-1.
Richard E. White. (1983). Peterson Field Guides: Beetles. Houghton Mifflin Company.