Yuramaya ( lat. Juramaia ) is a genus of extinct mammals known from the fossilized remains of the Middle and Upper Jurassic ( 167.7–150.8 million years ago) from Liaoning deposits ( PRC ) [1] .
| † Yuramaya | |||||||||||||||||||||||||||||||||||||||||
 Reconstruction | |||||||||||||||||||||||||||||||||||||||||
| Scientific classification | |||||||||||||||||||||||||||||||||||||||||
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| International scientific name | |||||||||||||||||||||||||||||||||||||||||
Juramaia Luo et al. , 2011 | |||||||||||||||||||||||||||||||||||||||||
| Single view | |||||||||||||||||||||||||||||||||||||||||
| Geochronology 167.7-150.8 Ma
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Mass Permian Extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion | |||||||||||||||||||||||||||||||||||||||||
Content
Description
Yuramaya is known for the BMNH PM1143 holotype , which is stored in the Beijing Museum of Natural History , an almost completely preserved skeleton that includes an incomplete skull with a full set of teeth. The skeleton was found in Dashigou, Jianchang , Tiaojishan formation. The genus received its name ("Jurassic mother") in 2011 [2] .
Taxonomy
The find of this skeleton has aggravated the history of placental mammals by 35 million years compared with previous ideas [3] [4] .
According to modern cladistic ideas, the kinship relations of yuramaya are as follows [2] :
| Theria |
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See also
- Acristium
- List of genera of Mesozoic mammals
Notes
- ↑ Juramaia . Paleobiology Database Classic . (Retrieved October 4, 2016) .
- ↑ 1 2 Zhe-Xi Luo, Chong-Xi Yuan, Qing-Jin Meng and Qiang Ji. A Jurassic eutherian mammal and divergence of marsupials and placentals (Eng.) // Nature: journal. - 2011 .-- 25 August ( vol. 476 ). - P. 442-445 . - DOI : 10.1038 / nature10291 . Electronic supplementary material .
- ↑ "Fossil redefines mammal history" BBC News .
- ↑ Discovery of a 160-million-year-old fossil represents a new milestone in early mammal evolution .