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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Curculionoidea » Snout and Bark Beetles (Curculionidae) » Broad-nosed Weevils (Entiminae) » Otiorhynchini » Otiorhynchus

Genus Otiorhynchus

Classification · Explanation of Names · Numbers · Size · Identification · Range · Habitat · Season · Food · Life Cycle · Remarks · Works Cited
Otiorhynchus rugosostriatus Otiorhynchus species - think sulcatus? - Otiorhynchus sulcatus Otiorhynchus singularis weevil - Otiorhynchus raucus Mottled brown weevil - Otiorhynchus singularis Weevil beetle - Otiorhynchus ovatus broad-nosed weevil - Otiorhynchus sulcatus Otiorhynchus rugosostriatus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea
Family Curculionidae (Snout and Bark Beetles)
Subfamily Entiminae (Broad-nosed Weevils)
Tribe Otiorhynchini
Genus Otiorhynchus
Explanation of Names
Otiorhynchus Germar 1822
Numbers
14 spp. in our area (all adventive), of which 11 in Canada; immense genus, ~1,500 spp. in at least 105 subgenera(1)(2)(Hlaváč 2011)
Size
4-11 mm
Identification
snout stout, squarish, widened toward tip; pronotum roundish with pebbled or bumpy surface; elytra color varies from light yellowish-brown to black, surface variously sculptured, rarely smooth; flightless (hind wings absent)
For hi-res images of most of our spp., see(3)(4)(5)

Key to our species in Warner & Negley 1976.
Range
native to the Palaearctic, adventive but widely established in NA north to AK, NWT
Habitat
usually on or near host plant; adults can be present in large numbers in gardens and around the houses and other buildings, and sometimes move inside(6) (e.g., seeking winter shelter)
Season
adults often spend colder months in homes and can be crawling around virtually anytime
Food
larvae and adults are polyphagous herbivores(1)
Life Cycle
one generation per year; overwinters as a larva in soil, or adult in leaf litter (or in homes)
most of NA populations are female-only (parthenogenetic) -- except for O. ligneus, O. meridionalis, & O. porcatus-- although in Europe males of all species are known(7)
Remarks
species not yet in the guide: O. arcticus, O. clavipes, O. desertus, O. dubius, O. monticola, O. rugifrons
Works Cited
1.Otiorhynchus porcatus (Coleoptera: Curculionidae): a European root weevil newly discovered in the Canadian Maritime Provinces
C.G. Majka & J.S. MacIvor. 2009. J. Acad. Entomol. Soc. 5: 27-31.
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.Schott C. Les coléoptères Curculionoidea d'Alsace
4.Borowiec L. (2007-) Iconographia Coleopterorum Poloniae
5.Benisch C. (2007-) kerbtier.de – Beetle fauna of Germany
6.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.
7.Insects and Arachnids of Canada Series, Part 25. Coleoptera, Curculionidae, Entiminae.
Donald E. Bright, Patrice Bouchard. 2008. 2008. NRC Research Press, Ottawa, Ontario, Canada.
Contributed by Cotinis on 29 September, 2004 - 7:34am
Additional contributions by Beatriz Moisset, Robin McLeod, Bbarnd, v belov
Last updated 13 November, 2020 - 8:08am

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