Crusted root weevil

Romualdius scaber · Order: Coleoptera · Family: Curculionidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Crusted root weevil
Photo: iNaturalist user, CC0

The crusted root weevil lives in both Europe and North America. It has historically been confused with Otiorhynchus carinatopunctatus because the original description was vague.

Source: Wikipedia

Where it lives

It occurs in Europe and North America.

Source: Wikipedia

Where it comes from

Its native range includes Europe and North America.

Source: Wikipedia

Where it is found in the US

Recorded in 18 of 51 states and DC. Most records: Washington, Pennsylvania, Massachusetts, Montana, New York, Michigan, Vermont, Oregon.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Status: introduced in Canada. Source: iNaturalist

Months it is reported in the US

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Source: GBIF

More photos

Crusted root weevil photo 2
Photo: Justin Donahue, CC BY
Crusted root weevil photo 3
Photo: Steven Joyner, CC BY
Crusted root weevil photo 4
Photo: Tyler Bishop, CC BY
Crusted root weevil photo 5
Photo: Philip Stepnowski, CC BY

Same family (Curculionidae)

Green Immigrant Leaf WeevilGreen Immigrant Leaf WeevilPolydrusus formosusDamages trees, gardens or cropsBlack Vine WeevilBlack Vine WeevilOtiorhynchus sulcatusDamages trees, gardens or cropsNettle weevilNettle weevilPhyllobius pomaceusDamages trees, gardens or cropsAsian Oak WeevilAsian Oak WeevilCyrtepistomus castaneusDamages trees, gardens or cropsStrawberry Root WeevilStrawberry Root WeevilOtiorhynchus ovatusDamages trees, gardens or cropsCommon Leaf WeevilCommon Leaf WeevilPhyllobius pyriDamages trees, gardens or crops

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Romualdius_scaber

Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia

Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.