Fig. 2From: Exceptional Variation on a Common Theme: The Evolution of Crustacean Compound EyesThe fossilized compound eye of the Devonian trilobite species Phacops rana. Note the orderly rows of large lenses. Unlike the compound eyes of modern crustaceans, in these early compound eyes each corneal lens is thought to have served a miniature retina. The overall image would have thus been formed from a mosaic of miniature sub-imagesBack to article page