The oldest known fossil among the Eutheria ("true beasts") is the small shrewlike Juramaia sinensis, or "Jurassic mother from China", dated to 160 million years ago in the Late Jurassic. A later eutherian, Eomaia, dated to 125 million years ago in the Early Cretaceous, possessed some features in common with the marsupials but not with the <answer>placental</answer>s, evidence that these features were present in the last common ancestor of the two groups but were later lost in the <answer>placental</answer> lineage. In particular:
Which lineage were some of these early marsupial features were lost?
placental