Stenopsocidae

Definition

A family of bark lice (order Psocodea, suborder Psocomorpha, infraorder Caeciliusetae) comprising approximately 100 described species. Diagnostic wing venation includes an areola postica connected to the M vein by a crossvein—a character distinguishing the family from related psocid groups. Members are typically found in leaf litter, bark, and vegetation where they feed on microflora including algae, lichens, and fungal spores.

Etymology

Example

Stenopsocus stigmaticus, a widespread European species, exhibits the characteristic areola postica–M vein crossvein that defines Stenopsocidae and separates it from the closely related family Amphipsocidae.

Related Terms

• Psocodea
• Psocomorpha
• Caeciliusetae
• areola postica
• bark lice
• Psocoptera

Usage Notes

Formerly treated as a suborder-rank group (Stenopsocidea) in some older classifications; modern phylogenetics places Stenopsocidae within Caeciliusetae. The wing venation character (areola postica connected to M vein) is diagnostic but requires careful dissection or high-magnification imaging to confirm in small specimens.