An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone
Alida M. Bailleul, Jingmai O’Connor, Shukang Zhang and 5 more
Nature Communications · 2019
doi:10.1038/s41467-019-09259-x (opens in a new tab)
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Abstract
The fossil record of the reproductive traits of early birds is limited. Here, Bailleul and colleagues describe the Cretaceous enantiornithine bird Avimaia schweitzerae, which preserves an unlaid egg in the abdominal cavity and putative medullary bone.
Abstract licence: CC BY-NC-ND
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