A team of scientists led by Jingmai O’Connor from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences, reported the first occurrence of medullary bone in Enantiornithes, the dominant clade of birds during the Cretaceous.
Main slab of Pengornithid Enantiornithine, preserved in three-dimensions unlike most compression fossils
from the Jehol Biota. Scale bar is one centimetre [Credit:…
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