Casebearer moths

Definition

A family of small moths (Lepidoptera: Coleophoridae) whose larvae construct portable, cylindrical cases from silk and plant fragments, carrying them while feeding externally on host foliage. The cases, often decorated with silk and frass, provide camouflage and protection through pupation. Adults are typically drab, narrow-winged, and under 15 mm, with reduced mouthparts.

Etymology

From the larval habit of bearing a portable case; family name Coleophoridae from Greek koleos (sheath, scabbard) + phoros (bearing).

Example

Coleophora serratella larvae feed on birch and alder, constructing distinctive bivalved cases that they enlarge with leaf pieces as they grow; the cases persist on vegetation after adult emergence.

Synonyms

• Coleophoridae
• case-bearing moths

Related Terms

• Bagworm moths
• leaf miner
• larval case
• Coleophora
• Phereoeca
• exophytic feeding
• stem borer

Usage Notes

Strictly refers to family Coleophoridae; not to be confused with bagworm moths (Psychidae), which also construct larval cases but belong to a different superfamily (Tineoidea vs. Gelechioidea) and typically attach debris more loosely. The term 'case-bearer' is sometimes applied more broadly in informal contexts, but specialists reserve it for Coleophoridae.