Trogiidae

Definition

A family of granary booklice in the order Psocodea, comprising approximately 11 genera and more than 50 described species. Members are small, soft-bodied insects typically associated with stored grain, dried foods, and other organic debris in human-built environments.

Etymology

From the type genus Trogium + -idae (family suffix).

Example

Trogium pulsatorium, a widespread species in Trogiidae, infests stored grain and can reach nuisance levels in poorly ventilated granaries.

Related Terms

• Psocodea
• Liposcelididae
• booklice
• Psocids
• stored-product entomology
• granary pest

Usage Notes

Trogiidae are distinguished from other psocid families (e.g., Liposcelididae) by subtle morphological characters including wing venation and genitalia; accurate identification to family level typically requires microscopic examination. The common name 'granary booklice' reflects their ecological association, though they also occur in natural habitats such as leaf litter and under bark.