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Evolutionary biology

Light on ancient photoreceptors

Early multicellular organisms had two distinct types of photoreceptor cells, apparently with different functions. How these cells combined to form modern eyes turns out to be a complicated story.

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Figure 1: Rhabdomeric ocellus from a Platynereis larva.

A. DORRESTEIJN/J. MARSHALL

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Lacalli, T. Light on ancient photoreceptors. Nature 432, 454–455 (2004). https://doi.org/10.1038/432454a

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