Thysanoptera

Definition

An order of minute, slender insects commonly known as thrips, characterized by two pairs of narrow wings fringed with long setae (giving the order its name from Greek thysanos "fringe" + pteron "wing"), asymmetrical piercing-sucking mouthparts, and weak flight using a "clap and fling" mechanism rather than conventional steady-state aerodynamics. Most species are 1–2 mm long (up to 14 mm in some tropical forms), with approximately 7,700 described species worldwide divided into two suborders: Terebrantia and Tubulifera. Many species are significant agricultural pests (e.g., Thrips palmi, Frankliniella occidentalis), while others serve as pollinators or predators of mites and other small arthropods.

Etymology

From Ancient Greek θύσανος (thúsanos, "fringe, tassel") + πτερόν (pterón, "wing"), referring to the distinctive fringed wings.

Example

Western flower thrips (Frankliniella occidentalis), a member of Thysanoptera, transmits Tomato spotted wilt virus to crops and has developed resistance to numerous insecticides, making integrated pest management essential in greenhouse production.

Synonyms

• thrips (common name)
• thunderflies (regional common name)

Related Terms

• Terebrantia
• Tubulifera
• Thrips
• fringed wing
• clap and fling
• asymmetrical mouthparts
• Insecta
• Pterygota

Usage Notes

The common name "thrips" is both singular and plural (one thrips, many thrips), which can confuse non-specialists. Thysanoptera is sometimes grouped with Hemiptera and related orders in the superorder Condylognatha based on mouthpart morphology, though this placement remains debated. The order is distinguished from other small winged insects by the combination of fringed wings, asymmetrical mouthparts, and the unique flight mechanism. Collection and identification require specialized techniques due to their minute size and fragility.