Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Trachyphloeus bifoveolatus - Crusted Root Weevil

Trachyphloeus bifoveolatus (Beck) - Trachyphloeus bifoveolatus Weevil 3 - Trachyphloeus bifoveolatus Weevil - Trachyphloeus bifoveolatus - female Tough grey beetle - Trachyphloeus bifoveolatus Very Small Snout Beetle - Trachyphloeus bifoveolatus unknown weevil - Trachyphloeus bifoveolatus Trachyphloeus bifoveolatus? - Trachyphloeus bifoveolatus Crusted Root Weevil - Trachyphloeus bifoveolatus
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 Entiminae (Broad-nosed Weevils)
Tribe Trachyphloeini
Genus Trachyphloeus
Species bifoveolatus (Crusted Root Weevil)
Synonyms and other taxonomic changes
recent workers call it Romualdius bifoveolatus(1)(2)
Explanation of Names
Trachyphloeus (Trachyphloeus) bifoveolatus (Beck 1817)
3-4 mm
Body densely covered with round, adpressed scales, that are grey to brown and do not form a conspicous pattern. A few short and apically dilated, erect bristles also present, but not influencing "smooth" look of the surface.
Rostrum with the antennal grooves visible in dorsal view as sublateral slits, dorsal surface of rostrum gently tapering anteriourly.
End of anteriour tibia rounded, lacking exteriour or apical spines, only stiff setae and interiour spur present.
native to Europe, adventive in NA(3) and now rather widespread; transcontinental in Canada(1)
soil; spreads with dry ballast(3); recorded in houses in e. & w. US(4)
Plant detritus, does not feed much on living plants
flightless and parthenogenetic (females only)
earliest record in our area: NY 1917(3)
Works Cited
1.Checklist of beetles (Coleoptera) of Canada and Alaska. Second edition
Bousquet Y., Bouchard P., Davies A.E., Sikes D.S. 2013. ZooKeys 360: 1–402.
2.Coleoptera Poloniae
3.The weevils (Coleoptera: Curculionoidea) of the Maritime Provinces of Canada, II: New records from Nova Scotia...
C.G. Majka, R.S. Anderson, & D.B. McCorquodale. 2007. The Canadian Entomologist 139: 397–442.
4.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.