Fig. 8From: Analysis of the genetically tractable crustacean Parhyale hawaiensis reveals the organisation of a sensory system for low-resolution visionHypotheses on the evolutionary changes that shaped the visual system of Parhyale. Illustrations depict the ancestral state of insect and malacostracan visual systems and four alternative scenarios for the evolutionary origin and homologies of the photoreceptors and visual neuropils of Parhyale (explained in the main text). The retina, lamina and medulla are coloured red, green and blue, respectively; short and long fibre photoreceptor types are coloured green and blue, respectivelyBack to article page