Bug FAQSpurred Ridgeback
Haplophthalmus danicus · Order: Isopoda · Family: Trichoniscidae
The Spurred Ridgeback is naturally found across Europe, Southern Asia, and temperate Asia. It has also been introduced to North America.
Source: Wikipedia
How to recognize it
It occurs naturally in Europe, Southern Asia, and temperate Asia, and has been introduced to North America.
Source: Wikipedia
Where it comes from
Its native range includes Europe, Southern Asia, and temperate Asia.
Source: Wikipedia
Where it is found in the US
Recorded in 30 of 51 states and DC. Most records: Virginia, New York, Maryland, Pennsylvania, Vermont, Wisconsin, California, Ohio.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: introduced in North America; introduced in United States; introduced in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Haplophthalmus_danicus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.