Bug FAQVariegated Ant-mimic Sac Spider
Castianeira variata · Order: Araneae · Family: Corinnidae
Also called: Variegated Ant-mimic Spider, Variegated Antmimic Corinne Spider
The variegated ant-mimic sac spider is about 7 to 9 mm long, with females a bit larger. This species lives in North and Central America and is similar in appearance to Castianeira longipalpus.
Source: Wikipedia
How to recognize it
The carapace is dark reddish brown to almost black with thin white hairs and is darker on the sides.
Source: Wikipedia
Where it lives
It is a member of the Corinnidae family found in North and Central America.
Source: Wikipedia
Where it comes from
Its native range includes North and Central America.
Source: Wikipedia
Lookalikes
It looks generally similar to Castianeira longipalpus.
Source: Wikipedia
Where it is found in the US
Recorded in 27 of 51 states and DC. Most records: Ohio, Missouri, Tennessee, Illinois, Massachusetts, Pennsylvania, Virginia, Texas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How can I identify this spider?
Look for a body 7 to 9 mm long, a dark reddish-brown to nearly black carapace with thin white hairs that are darker on the sides, and note that it resembles Castianeira longipalpus.
Source: Wikipedia
Same family (Corinnidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Castianeira_variata
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.