description Eomaia scansoria Overview
Eomaia scansoria was a small mammal that lived about 125 million years ago during the Early Cretaceous and is known from the Yixian Formation of northeastern China. Described in 2002 from a remarkably complete compression fossil, it preserves impressions of fur and details of the skeleton and soft tissues. Its limb and foot anatomy has been interpreted as adapted partly for climbing. Eomaia is an early member of the eutherian lineage, which includes placental mammals, but it was not itself a modern placental mammal.
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How old is the Eomaia scansoria fossil?
Eomaia scansoria lived approximately 125 million years ago during the Early Cretaceous period. The fossil was found in the Yixian Formation of northeastern China, part of the famous Jehol Biota that has produced thousands of exceptionally preserved fossils of dinosaurs, mammals, birds, and plants.
Where was Eomaia scansoria discovered?
Eomaia scansoria was found in the Yixian Formation in Liaoning Province of northeastern China, a region world-renowned for its extraordinarily well-preserved fossils. The fine-grained volcanic sediments of the formation preserved delicate details like fur, feathers, and soft tissues that are normally lost in fossilization.
What does the name Eomaia scansoria mean?
The genus name Eomaia comes from Greek roots meaning 'dawn mother,' reflecting its significance as one of the earliest known eutherian mammals in the fossil record. The species name scansoria means 'climbing,' referring to limb proportions and claw shapes that suggest this small mammal was adapted for climbing in trees.
Does the Eomaia fossil really preserve fur impressions?
Yes, the remarkably complete compression fossil of Eomaia scansoria preserves clear impressions of fur and skeletal details including the skull, limbs, and teeth. This exceptional preservation is characteristic of the Yixian Formation fossils and has provided scientists with rare direct evidence of soft tissue in early mammals.
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