The corinnid sac spiders (family Corinnidae), like the other clubionoid families, have a very confusing taxonomic history. Once this family was a part of the large catch-all taxon Clubionidae, now a shadow of its former self. The clubionoids 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. Genera Clubiona Elaver The sac spiders of the family Clubionidae have a very confusing taxonomic history. ...

Among the families formerly classified as "Clubionidae", some of which have common names including the words "sac spider", include:

• Anyphaenidae (anyphaenid sac spider)
• Tengellidae (tengellid spider)
• Zorocratidae (zorocratid spider)
• Miturgidae (long-legged sac spider)
• Corinnidae (corinnid sac spider)
• Liocranidae (liocranid sac spider)
• Clubionidae (sac spiders)

The Corinnidae, as now recognized, contains 75 genera and over 900 species worldwide, making it the largest of the "clubionoid" families. Among the common genera are Castianeira (nearly world wide),Corinna (widespread), Meriola (New World), Phrurolithus (widespread),Phrurotimpus (North America) and Trachelas (widespread). Genera Anyphaena Hibana The anyphaenid sac spiders of the family Anyphaenidae are distinguished from the sac spiders and other spiders by having the abdominal spiracle placed one third to one half of the way anterior to the spinnerets toward the epigastric furrow on the underside of the abdomen. ... Genera eight known The tengellid spiders (family Tengellidae) include only eight genera and a little over 30 species worldwide. ... Zorocratid spiders are uncommon, somewhat wolf spider-like, wandering spiders. ... Genera many, see text The long-legged sac spiders (family Miturgidae) include nearly 400 species in about 30 genera worldwide. ... Genera Agroeca Neoanagraphis Liocranid sac spiders consist of about 170 species of wandering spiders in 30 or so genera. ... Genera Clubiona Elaver The sac spiders of the family Clubionidae have a very confusing taxonomic history. ...

Members of the genus Castianeira appear to be mimics of ants and velvet ants. Other corinnid ant-like genera include Mazax, Myrmecium and Myrmecotypus. The "phurolithines" (including Phrurolithus and Phrurotimpus) are tiny spiders often found in leaf litter that have many ventral spines on their first tibiae. The 'trachelines" (Meriola and Trachelas) are usually bicolored spiders with red-brown cephalothoraxes (carapaces) and dirty grey to yellowish abdomens. Corinna is the type genus for the family and consists of small running spiders.

External links

• Platnick, N.I. 2003. World Spider Catalog (http://research.amnh.org/entomology/spiders/catalog81-87/index.html)