Castianeira variata
Gertsch, 1942
Variegated Ant-mimic Sac Spider
Castianeira variata is an -mimicking in the Corinnidae, found in North and Central America. Females typically measure 7–9 mm in body length and are larger than males. The exhibits of ants, particularly , as a defense strategy against . It is similar in general appearance to C. longipalpus and can be distinguished by specific coloration and pattern details.
Pronunciation
How to pronounce Castianeira variata: /kæstiəˈnaɪrə vəˈriːətə/
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Identification
The is dark reddish to nearly black with thin hairs, darker on the sides. Body length ranges 7–9 mm, with females larger than males. Similar in general appearance to C. longipalpus; precise separation may require examination of specific morphological features not detailed in available sources.
Images
Distribution
North America and Central America. Distribution records include USA and Canada.
Ecological Role
-mimic in the Castianeira function as active in leaf litter and ground-level . Their ant- provides protection from predators that avoid aggressive, chemically-defended ants.
Human Relevance
Not recognized as dangerously venomous to humans. Observations contribute to citizen science records through platforms such as iNaturalist.
Similar Taxa
- Castianeira longipalpusSimilar in general appearance; distinguished by specific coloration and pattern details of the and body.
- Castianeira cingulataAnother -mimic in the same with comparable size range and ant-mimicking , though C. cingulata has two pale on the and ranges through eastern North America.