For decades, paleoartists have imagined pterosaurs in vivid, colorful hues. Now, a stunning new fossil analysis suggests that at least one species really did shimmer with shifting iridescent colors, much like modern starlings and pigeons.
The discovery comes from a specimen of Sinopterus dongi, unearthed in northeastern China. Scanning electron microscopy revealed layered arrays of melanosomes within the creature's pycnofibers — structures that closely resemble those producing iridescence in modern bird feathers. Computer simulations predict deep greens and magentas that shifted with viewing angle.
The diversity and organization of melanosomes matches patterns seen only in warm-blooded birds and mammals, suggesting elevated metabolisms and sophisticated thermoregulation — traits long debated among paleontologists. The finding also hints that iridescent displays may have played a role in courtship rituals.
"This is one of the most intriguing and surprising fossil discoveries of the past few years." — Dr. Steve Brusatte, University of Edinburgh
📄 Original paper (bioRxiv) · Science News summary
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