Eomaia ("dawn mother") is a genus of extinct fossil mammals containing the single species Eomaia scansoria, discovered in rocks that were found in the Yixian Formation, Liaoning Province, China, and dated to the Barremian Age of the Lower Cretaceous about 1]

始祖兽（学名Eomaia）是一种已灭绝的哺乳动物，有可能是真兽下纲的最早祖先。 始祖兽的化石是在中国辽宁的义县组发现，可追溯至下白垩纪的巴列姆阶。

始祖獸（學名 Eomaia ）是一種已滅絕的哺乳動物，有可能是真獸下綱的最早祖先。 始祖獸的 化石 是在 中國 遼寧 的 義縣組 發現，可追溯至 下白堊紀 的 巴列姆階 。

2002年4月25日 · Eomaia differs from the Late Cretaceous eutherians Asioryctes and Zalambdalestes in having an enlarged and elongate trapezium in the wrist .

The ankle of Eomaia bears strong resemblance to those of Late Cretaceous eutherians30–32. The medial astragalotibial facet is well developed, vertical, and separated by a sharp crest from the lateral astragalotibial facet, a diagnostic eutherian feature. The navicular facet is distinctive from the astragalar neck, and does not extend to

2018年6月13日 · This new fossil demonstrates that Sinodelphys is a eutherian, and that postcranial differences between Sinodelphys and the Jehol eutherian Eomaia—previously thought to indicate separate ...

Eomaia ('dawn mother') is an early fossil eutherian mammal. It is exceptionally well-preserved for a 125 million-year-old specimen. It was discovered in rocks of the Yixian Formation, Liaoning Province, China. These stratas date from the Late Jurassic to the Cretaceous about 125 million years ago (mya). [1]

For example, when the next oldest fossil placental (Eomaia scansoria) was discovered about 10 years ago, it too was heralded as an ancestor of all placental mammals. However, the discovery of additional fossils and new analyses make it clear that Eomaia is simply a twig on the branch of the tree of life that gave rise to placental mammals, as ...

2002年5月1日 · Those have tribosphenic molars and were interpreted as eutherians (Eomaia, Acristatherium) and metatherian (Sinodelphys), indicating a minimum age for the metatherian-eutherian split of 125 Ma...

The new species is named Eomaia (Dawn Mother in Greek) scansoria (climber in Latin). The new fossil clearly has some transitional features. In particular: Epipubic bones extending forwards from the pelvis (normally found in marsupials but not in placental mammals, except in …