-
Juramaia is an
extinct genus of very
basal eutherian mammal known from the Late Jur****ic (Oxfordian stage)
deposits of
western Liaoning, China. It is a...
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defined group than Placentalia. The oldest-known
eutherian species is
Juramaia sinensis,
dated at 161 million
years ago from the
early Late Jur****ic (Oxfordian)...
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upper jaw in
other tetrapods. The
earliest known therian mammal fossil is
Juramaia, from China's Late Jur****ic (Oxfordian stage). However, the age estimates...
- from Asia Chaoyangsaurus, an
early marginocephalian dinosaur from Asia
Juramaia, a
basal mammal from Asia Archaeopteryx, the
first known bird, from Europe...
- oldest-known
fossil among the
Eutheria ("true beasts") is the
small shrewlike Juramaia sinensis, or "Jur****ic
mother from China",
dated to 160 million
years ago...
- Late Jur****ic,
represented by
Juramaia, a
eutherian mammal closer to the
ancestry of
placentals than marsupials.
Juramaia is much more
advanced than expected...
-
estimates of 163 to 186
million years ago (though the
already eutherian Juramaia is
dated to 161–160
million years ago).
Teinolophos like
modern monotremes...
- the
eutherians are
those more
closely related to the placentals.
Since Juramaia, the
earliest known eutherian,
lived 160
million years ago in the Jur****ic...
-
study again recovered Eomaia as a
basal eutherian.
Evolution of
mammals Juramaia (160 million
years ago)
Sinodelphys Ji, Q.; Luo, Z-X.; Yuan, C-X.; Wible...
- in the
fossil record (Yinlong) and the
oldest known eutherian mammal:
Juramaia. 160 Ma
Multituberculate mammals (genus Rugosodon)
appear in
eastern China...
