Dinosaur with iridescent feathers


Click to enlargeVelizar Simeonovski, The Field Museum

❝ The discovery that dinosaurs were feathery, not leathery, means we’ve had to rethink how they might have looked – and now there’s evidence that at least one dinosaur could have been as brilliantly coloured as some of the most jewel-hued modern birds.

Caihong juji, a name that means “rainbow with the big crest” in Mandarin, was a tiny, duck-sized dinosaur from China. The fossil it left behind indicates a bony crest on its beak, and a brilliant, iridescent ruff of feathers around its neck – the earliest evidence of a colour-based display…

❝ It’s difficult to tell for certain what colour the feathers were, but the fossil was so detailed that it preserved the shape of the melanosomes, the organelles inside cells responsible for pigmentation.

And when the team compared these melanosomes to those of living birds, they most closely resembled melanosomes found in the iridescent, rainbow-hued feathers of hummingbirds.

RTFA for more on the find – and analysis. And special thanks to UrsaRodinia.

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