Leopard Attacked People, West Bengal, India

Taxonomy and evolution
Like all of the feline family, the Panthera genus has been subject to much alteration and debate, and the exact relations between the four species as well as the clouded leopard and snow leopard have not been effectively resolved. It is believed that the basal divergence amongst the Felidae family occurred about 11 million years ago. The last common ancestor of the lion, tiger, leopard, jaguar, snow leopard, and clouded leopard is believed to have occurred about 6.37 million years ago. Panthera is believed to have emerged in Asia, with ancestors of the leopard and other cats subsequently migrating into Africa. Fossils of early leopard ancestors have been found in East Africa and South Asia from the Pleistocene of 2 to 3.5 Ma. The modern leopard is suggested to have evolved in Africa 470,000–825,000 years ago and radiated across Asia 170,000–300,000 years ago.
Results of phylogenetic analyses of chemical secretions amongst cats has suggested that the leopard is closely related to the lion. A mitochondrial DNA study carried out later suggests that the leopard is closely related to the snow leopard, which is placed as a fifth Panthera species, Panthera uncia. The researchers suggest that the snow leopard is most closely aligned with the tiger, whereas the leopard possibly has diverged from the Panthera lineage subsequent to these two species, but before the lion and jaguar. The leopard is also considered the type species of the genus Panthera.