|image = Thylacosmilus_atrox.jpg |image_caption = Thylacosmilus atrox and Mesotherium | regnum = Animalia | phylum = Chordata | classis = Mammalia | infraclassis = Metatheria | ordo = Sparassodonta | familia = Thylacosmilidae | genus = Thylacosmilus | genus_authority = Riggs, 1933 | subdivision_ranks = Species | subdivision = T. atrox T. lentis }} Thylacosmilus ("pouch sabre") was a genus of sabre-toothed metatherian predators that first appeared during the Miocene. Remains of the animal have b… (More on Thylacosmilus)