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Giving eyespots a shiner: Pharmacologic manipulation of the Io moth wing pattern.
F1000Research 2017
Our knowledge of wing pattern formation in Lepidoptera has advanced significantly in recent years due to the careful examination of several groups of butterflies. The eyespot is a prominent feature of Lepidoptera wing pattern, especially in the family Saturniidae. The present study examined how sulfated polysaccharides affected the wing pattern formation of the Io moth, Automeris io (Saturniidae). Prepupae and pupae of this species were subjected to injections of heparin and cold shock. While the cold shock had little to no effect on wing pattern, the aberrations resulting from heparin injections were moderate to profound and depended on the dose and the stage at which injection was made. The changes consisted of expansion of the black ring around the dorsal hindwing eyespots and distortion of discal spots on both dorsal and ventral sides of forewings, suggesting a possible link between genetic controls of these elements. Several different types of scales form the normal color pattern of Automeris io , and heparin-induced changes correspond to changes in shape of scales. The resulting aberrations are dubbed 'Black Eye' and 'Comet Eye.' Other known aberrations of Automeris io eyespots are summarized, illustrated, and named.
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