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Fig. 7 | Evolution: Education and Outreach

Fig. 7

From: Evolution of Insect Eyes: Tales of Ancient Heritage, Deconstruction, Reconstruction, Remodeling, and Recycling

Fig. 7

Homology of eyes in directly developing and endopterygote insects (after Friedrich 2006b). a Indirect development shown in D. melanogaster. 1 Differentiation of larval eyes (Bolwig organs). 2 Specification and separation of eye–antennal imaginal disc cells. 3 Functional Bolwig organs. 4 Nascent eye–antennal imaginal disc. 5 Cell proliferation in eye–antennal imaginal disc during larval development. 6 Degradation of larval epithelium. 7 Dedifferentiation of the Bolwig organs to H-B eyelets by relocalization into the brain. 8 Onset of retinal differentiation in the eye–antennal imaginal disc. 9 Eversion of eye–antennal imaginal disc. 10 Functional Drosophila compound eye generated by fully everted and differentiated eye–antennal imaginal disc. 11 Drosophila H-B eyelets. b Direct development shown in the American desert locust Schistocerca americana. 12 Onset of retinal differentiation in the embryo. 13 Postembryonic expansion of the nymphal compound eye. 14 Adult grasshopper compound eye. The embryonic phase of eye development is indicated by blue background. The postembryonic phase of eye development is indicated by red background

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