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Dinosaur-era bird fossil found with unlaid egg

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2019-03-28 10:10:23China Daily Editor : Li Yan ECNS App Download
A fossilized bird dating back about 110 million years is discovered in Yumen, Northwest China's Gansu province. (Photo/Chinanews.com)

A fossilized bird dating back about 110 million years is discovered in Yumen, Northwest China's Gansu province. (Photo/Chinanews.com)

A group of scientists in Gansu province have discovered a fossilized bird dating back about 110 million years and the first ever to have an unlaid egg in its abdomen.

The fossil represents a new species, Avimaia schweitzerae, belonging to a group called the Enantiornithes, which was abundant around the world and coexisted with dinosaurs in the Cretaceous period.

The well preserved fossil was discovered in the city of Yumen.

Because the specimen was crushed flat, it was only after a small fragment was extracted and analyzed under a microscope that the research team at the Chinese Academy of Sciences' Institute of Vertebrate Paleontology and Paleoanthropology realized the unusual tissue was an egg, said Alida Bailleul, the lead author of the article.

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