- Eutheria. The
oldest uncontested metatherians are now 110
million year old
fossils from
western North America.
Metatherians were
widespread in Asia and North...
-
metatherians,
probably split from
those of
placental mammals (eutherians)
during the mid-Jur****ic period,
though no
fossil evidence of
metatherians themselves...
-
Theria includes the
eutherians (including the
placental mammals) and the
metatherians (including the marsupials) but
excludes the egg-laying
monotremes and...
- America. In the
northern hemisphere, cimolodont, multituberculates,
metatherians and
eutherians were the
dominant mammals, with the
former two groups...
- mammals – the
eutherians (placentals) in the
northern hemisphere and the
metatherians (marsupials, now
mainly restricted to
Australia and to some
extent South...
-
years ago) and is at most no
older than
Oligocene in age. Many
extinct metatherians, such as Alphadon, Peradectes, Herpetotherium, and Pucadelphys, were...
- multituberculates,
eutriconodonts and spalacotheriids. The earliest-known
metatherian is Sinodelphys,
found in 125-million-year-old
Early Cretaceous shale...
-
Standhardt (2012). "The
phylogeny and
evolution of Cretaceous–Palaeogene
metatherians:
cladistic analysis and
description of new
early Palaeocene specimens...
-
comparing Thylacosmilus to both
extinct and
modern carnivorans and
metatherians,
suggest that it
weighed between 80 and 120
kilograms (180 and 260 lb)...
- as
Repenomamus and Gobiconodon,
early therians began to
expand into
metatherians and eutherians, and
cimolodont multituberculates went on to
become common...
