Metatheria
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Metatheria is a mammalian clade that includes all mammals more closely related to marsupials than to placentals. First proposed by Thomas Henry Huxley in 1880, it is a more inclusive group than the ma
Lycopsis longirostris
Mouse Possum Tambopata Reserve Peru 8
Alphadon sp. MUSE
Thylacosmilus NT small
Sparassodonta
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Sparassodonta is an extinct order of carnivorous metatherian mammals related to modern marsupials. They were once considered to be true marsupials, but are now thought to be a separate side branch tha
Metatheria
…and underwent a major diversificiation, with South American metatherians including both the ancestors of extant marsupials as well as the extinct Sparassodonta, which were major predators in South American ecosystems during most of the Cenozoic, up until their extinction in the Pliocene, as well as the…
Lycopsis longirostris AMNH
Thylacosmilus had long sabers.
Skull of Borhyaena (Borhyaenidae)