Corinnidae is a family of araneomorph spiders, sometimes called corinnid sac spiders. The family, like other "clubionoid" families, has a confusing taxonomic history. Once it was a part of the large catch-all taxon Clubionidae, now very much smaller. The original members of the family are apparently similar only in that they have eight eyes arranged in two rows, conical anterior spinnerets that touch and are generally wandering predators that build silken retreats, or sacs, usually on plant terminals, between leaves, under bark or under rocks.
Castianeira is a genus of ant-like corinnid sac spiders first described by Eugen von Keyserling in 1879. They are found in Eurasia, Africa, and the Americas, but are absent from Australia. Twenty-six species are native to North America, and at least twice as many are native to Mexico and Central America.
Sergiolus is a genus of ground spiders that was first described by Eugène Simon in 1892. They are 3.3 to 9 millimetres long.
Castianeira variata is a species of spider in the family Corinnidae, found in North and Central America. The body length is typically 7 to 9 mm, the females being larger. Castianeira variata is similar in general appearance to C. longipalpus. The carapace dark reddish brown to nearly black with thin white hairs, darker on the sides.
Castianeira alteranda is a species of true spider in the family Corinnidae. It is found in the US and Canada.
Castianeira trilineata is a species of true spider in the family Corinnidae. It is an ant mimic found in the United States and Canada.
Castianeira thalia is a species of true spider in the family Corinnidae. It is found in the United States.
Castianeira walsinghami is a species of true spider in the family Corinnidae. It is found in the United States and Canada.
Castianeira occidens is a species of true spider in the family Corinnidae. It is found in the United States and Mexico.
Castianeira gertschi, the Gertsch antmimic, is a species of true spider in the family Corinnidae. It is found in the United States and Canada.
Castianeira floridana is a species of true spider in the family Corinnidae. It is found in the United States and Cuba.
This ant mimic spider species in the family Corinnidae can be dark grey, brown or black with numerous transverse bands on their abdomen. Females are 7-9mm long and males are 5.5-6mm long. They are fast runners, often active during the day, living on the ground and among leaves or under rocks and other debris in prairies, deciduous forests, shrubby areas, and wooded sand dunes. They are the most widespread member of the genus Castianeira in the United States and Canada
Castianeira crucigera is a species of true spider in the family Corinnidae. It is found in the United States.
Castianeira amoena is a species of true spider in the family Corinnidae. It is found in the United States and Mexico.
Castianeira crocata is a species of true spider in the family Corinnidae, sometimes called by the common name red stripe spider. The species was first described by Nicholas Marcellus Hentz in 1847. It is found in the United States. Though its body shape is quite different, its characteristic black body and red-marked back puts it at risk of being mistaken for a black widow spider.
Castianeira dorsata is a species of true spider in the family Corinnidae. It is found in the United States and Mexico.
Castianeira athena is a species of true spider in the family Corinnidae. It is found in the United States and Mexico.
Castianeira descripta, the redspotted antmimic, is a species of true spider in the family Corinnidae. It is found in the United States and Canada.
Castianeira swiftay is a species of sac spider in the family Corinnidae. It is found in Costa Rica, and named in honor of the American singer-songwriter Taylor Swift.
