An Early Cretaceous eutherian from the Jehol biota. Its well-preserved anatomy informed reassessment of characters used to distinguish early eutherians from metatherians. [ref]
An Early Cretaceous eutherian and the placental–marsupial dichotomy by Shundong Bi and others. Nature 558, pp. 390–395; Ambolestes anatomy and revised placement of Sinodelphys
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