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Saturniidae (atlas moths, emperor moths, moon moths; subclass Pterygota, order Lepidoptera) Family of large to very large moths with characteristic eye-spots on the fore wings and hind wings. The wings are very broad, the antennae are bipectinate in both sexes, and the proboscis is absent. Larvae bear fleshy protuberances (scoli), and have hairs and spines. The cocoon is dense. Distribution is worldwide but primarily tropical.