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Updated: Apr 16, 2026
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Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue
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Un mamífero eutherian jurásico y la divergencia de los marsupiales y placentarios
Zhe-Xi Luo1, Chong-Xi Yuan, Qing-Jin Meng
1Carnegie Museum of Natural History, Pittsburgh, Pennsylvania 15213, USA. luoz@carnegiemnh.org
Nature
|August 26, 2011
Resumen
El descubrimiento de un nuevo mamífero euteros del Jurásico en China retrasa el origen de los mamíferos placentarios en 35 millones de años. Este hallazgo ayuda a resolver las discrepancias entre la evidencia fósil y las estimaciones moleculares para la evolución placentaria temprana.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
- Evolución de los mamíferos Evolución de los mamíferos
Sus antecedentes:
- Los placentarios son los mamíferos más abundantes, dominando los ecosistemas terrestres desde la era Cenozoica.
- La divergencia de los eutherians (mamíferos placentarios) de los metatherians (marsupiales) es un evento clave en la historia de los mamíferos.
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