Extended Data Fig. 2: FEG-SEM micrograph and single-element EDS maps from a fossilized crane-fly compound eye (specimen MHM-18-6a). | Nature

Extended Data Fig. 2: FEG-SEM micrograph and single-element EDS maps from a fossilized crane-fly compound eye (specimen MHM-18-6a).

From: Fossil insect eyes shed light on trilobite optics and the arthropod pigment screen

Extended Data Fig. 2

SEM EDS maps differentiating increased levels of carbon, with traces of nitrogen and sulfur, in the corneal facet walls (identified by increased colour intensity) versus calcium and oxygen enrichment (with minor amounts of magnesium) in the ommatidial lenses. Data are representative of three independent analyses. Scale bar, 50 μm.

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