Chrysopterygius

Chrysopterygius is a genus of prehistoric ray-finned fish that lived during the Jurassic period. The name Chrysopterygius, meaning "golden fin," refers to the iridescent or golden appearance of its fins, which is suggested by fossil evidence or interpretations of its coloration. Fossils of Chrysopterygius have been found in marine sedimentary rocks, indicating that it inhabited ancient seas.

This genus is known from a limited number of fossil specimens, which provide insights into its morphology and potential ecological niche. Chrysopterygius possessed a body shape typical of many Mesozoic ray-finned fishes, likely adapted for swimming in shallow marine environments. Its diet is presumed to have consisted of small invertebrates or planktonic organisms, based on the jaw structure and dentition observed in fossil remains. The discovery and study of Chrysopterygius contribute to our understanding of fish evolution and biodiversity during the Mesozoic Era, a period characterized by significant diversification of marine life. Further research may reveal more about its specific relationships within the broader group of ray-finned fishes.