- Eutheria. The
oldest uncontested metatherians are now 110
million year old
fossils from
western North America.
Metatherians were
widespread in Asia and North...
-
Theria includes the
eutherians (including the
placental mammals) and the
metatherians (including the marsupials) but
excludes the egg-laying
monotremes and...
-
called metatherians,
probably split from
those of
placentals (eutherians)
during the mid-Jur****ic period,
though no
fossil evidence of
metatherians themselves...
-
years ago) and is at most no
older than
Oligocene in age. Many
extinct metatherians, such as Alphadon, Peradectes, Herpetotherium, and Pucadelphys, were...
-
comparing Thylacosmilus to both
extinct and
modern carnivorans and
metatherians,
suggest that it
weighed between 80 and 120
kilograms (180 and 260 lb)...
- an
extinct genus of small,
primitive mammal that was a
member of the
metatherians, a
group of
mammals that
includes modern-day marsupials. Its fossils...
-
Metatherians reported from the
Sharps Formation Genus Species Location Stratigraphic position Material Notes Images Herpetotherium H.
youngi Wounded Knee...
- as
Repenomamus and Gobiconodon,
early therians began to
expand into
metatherians and eutherians, and
cimolodont multituberculates went on to
become common...
- The
Chichinales Formation is a
geological formation in Río
Negro Province,
Argentina which dates from the Late
Oligocene to the
Early Miocene,
around 23...
- mammals – the
eutherians (placentals) in the
Northern Hemisphere and the
metatherians (marsupials, now
mainly restricted to
Australia and to some
extent South...
