Bug FAQRavine Trapdoor Spider
Cyclocosmia truncata · Order: Araneae · Family: Halonoproctidae
The Ravine Trapdoor Spider has a rigid, disc-shaped abdomen that it uses to plug the entrance of its burrow. It occurs in the United States.
Source: Wikipedia
How to recognize it
Its abdomen is rigid and disc-shaped, allowing it to block the entrance of its trapdoor.
Source: Wikipedia
Where it lives
This spider is found in the United States.
Source: Wikipedia
Where it comes from
Its native range includes the United States.
Source: Wikipedia
Where it is found in the US
Recorded in 6 of 51 states and DC. Most records: Tennessee, Alabama, Georgia, Kansas, Louisiana, Mississippi.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Same family (Halonoproctidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Cyclocosmia_truncata
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.