Chocophorus alternaria is a moth of the Pterophoridae family. It is found in Argentina, Chile and Ecuador. The wingspan is 13–21 mm. The head is scaled in pale grey and brown-grey scales. The antennae are pale grey to pale brown-grey. The thorax is pale brown-grey and the abdomen pale brown-grey, with three longitudinal brown lines on the upperside. The forewings are pale grey with indistinct pale brown-grey scaling with increasing intensity toward the base of the cleft. There are several dark brown spots and some dark brown and white scales. The fringes along the costal margin of the first lobe are alternating dark brown and pale grey. The dorsal fringes of the first lobe are grey-brown and the costal fringes of the second lobe have two alternating dark brown and grey-white patches. There