Coleophoridae

Case-bearers
Adult of an unidentified case-bearer species
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Superfamily:	Gelechioidea
Family:	Coleophoridae Hübner, [1825]
Diversity
Over 9,000 species

The Coleophoridae are a family of large moths, belonging to the huge superfamily Gelechioidea. Collectively known as case-bearers, casebearing moths or case moths, this family is represented on all continents, but the majority are found in temperate areas of the Northern Hemisphere. They are most common in the Palearctic, and rare in sub-Saharan Africa, South America, and Australia; consequently, they probably originated (like most or all other Gelechioidea families) in northern Eurasia.They are relatively common in houses, they seek out moist areas to rest and procreate.

These "micromoths" are generally of slender build, and like in many of their relatives, the margins of their wings usually consist of a "fringe" of hairs. The tiny caterpillar larvae initially feed internally on the leaves, flowers, or seeds of their host plants. When they emerge to feed externally, they usually construct a protective silken case, discarded and built anew as they grow and molt. The common names of the Coleophoridae refer to this habit.

The bagworm moths (Psychidae), which also belong to the primitive Ditrysia (although to superfamily Tineoidea, not Gelechioidea), build similar cases as larvae. As opposed to these, though, the case-bearer females leave their cases to pupate and have normally developed wings as adults, instead of being neotenous as female bagworms usually are.

About 95% of the over 1,000 described species have been placed in the "wastebin genus" Coleophora. Many proposals have been made to split smaller genera from Coleophora, but few have been accepted, due to the uncertainties about which species are closest to the type species of Coleophora – C. anatipennella – and thus would remain in the genus.

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Wikipedia