Panthera youngi
Panthera youngi is a fossil cat species that was described in 1934; fossil remains of this cat were excavated in a "Sinanthropus" formation in Choukoutien, northeastern China. Upper and lower jaws excavated in Japan's Yamaguchi Prefecture were also attributed to this species. It is estimated to have lived about 350,000 years ago in the Pleistocene epoch. It was suggested that it was conspecific with "Panthera atrox" and "P. spelaea" due to their extensive similarities. Some dental similarities were also noted with the older "P. fossilis", however, "Panthera youngi" showed more derived features.