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Iridescent structural coloration in a crested Cretaceous enantiornithine bird from the Jehol Biota
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Iridescent structural coloration in a crested Cretaceous enantiornithine bird from the Jehol Biota
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Iridescent structural coloration in a crested Cretaceous enantiornithine bird from the Jehol Biota
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Journal Article
Iridescent structural coloration in a crested Cretaceous enantiornithine bird from the Jehol Biota
2025
Overview
A combination of sectioning and microscopy techniques, along with the application of finite-difference-time-domain modeling on a fossil feather, results in the novel estimation of the range of iridescent colors from the fossilized melanosome type and organization preserved in the elongate head crest feathers of a new Cretaceous enantiornithine bird. The densely packed rod-like melanosomes are estimated to have yielded from red to deep blue iridescent coloration of the head feathers. The shape and density of these melanosomes also may have further increased the feather’s structural strength. This occurrence on a likely male individual is highly suggestive of both a signaling function of the iridescent crest and a potential behavioral role in adjusting the angle of light incidence to control the display of this iridescent structural coloration.
