A Jurassic eutherian mammal and divergence of marsupials and placentals.
Nature
; 476(7361): 442-5, 2011 Aug 24.
Article
em En
| MEDLINE
| ID: mdl-21866158
ABSTRACT
Placentals are the most abundant mammals that have diversified into every niche for vertebrates and dominated the world's terrestrial biotas in the Cenozoic. A critical event in mammalian history is the divergence of eutherians, the clade inclusive of all living placentals, from the metatherian-marsupial clade. Here we report the discovery of a new eutherian of 160 Myr from the Jurassic of China, which extends the first appearance of the eutherian-placental clade by about 35 Myr from the previous record, reducing and resolving a discrepancy between the previous fossil record and the molecular estimate for the placental-marsupial divergence. This mammal has scansorial forelimb features, and provides the ancestral condition for dental and other anatomical features of eutherians.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Limite:
Animals
/
Pregnancy
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article