Jurassic Fossil Discovery in China Reveals Clues to Bird Evolution

A research team led by Professor Wang Min from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences has discovered two bird fossils from the Jurassic period in Fujian Province, China. These fossils, which are around 149 million years old, offer fresh insights into the early evolutionary history of birds. Published in Nature, this study challenges earlier beliefs about bird evolution and indicates that birds were more diverse by the end of the Jurassic period than previously recognized. The finding of Baminornis zhenghensis, the oldest known short-tailed bird, pushes back the timeline for the emergence of this trait by nearly 20 million years, enhancing our understanding of avian evolution.

Key points of the Discovery

• Discovery Location: Fujian Province, southeast China
• Age of Fossils: ~149 million years (Jurassic period)
• Significance: Fills a crucial gap in the early evolution of birds
• Published in: Nature

Baminornis zhenghensis – The Oldest Short-Tailed Bird

• Named Baminornis zhenghensis, one of the two fossils exhibits key evolutionary traits.
• Possesses a short tail ending in a pygostyle, a feature of modern birds.
• Displays a combination of primitive and advanced traits, including,
• 1. Ornithothoracine bird-like shoulder and pelvic girdles (advanced feature).
• 2. Hand structure resembling non-avialan dinosaurs (primitive feature).
• Pushes back the first appearance of short-tailed birds by nearly 20 million years.
• Phylogenetic analysis places Baminornis zhenghensis as a derived form closely related to Archaeopteryx.