Lyonetiidae is a family of moths with some 200 described species. These are small, slender moths, the wingspan rarely exceeding 1 cm. The very narrow forewings, held folded backwards covering the hindwings and abdomen, often have pointed apices noticeably up- or down-turned. The larvae are leaf miners. The families Bucculatricidae and Bedelliidae are sometimes considered a subfamily of Lyonetiidae.