The genus containing lions, tigers, leopards, jaguars, and snow leopards is Panthera.
Panthera is a genus within the cat family, Felidae. Its living members include the lion (Panthera leo), tiger (Panthera tigris), leopard (Panthera pardus), jaguar (Panthera onca), and snow leopard (Panthera uncia). These cats are often called the “big cats,” although that informal term can also include species outside Panthera.
A key feature associated with Panthera cats is the ability to produce a true roar, especially in lions, tigers, leopards, and jaguars. The snow leopard is the notable exception: despite belonging to Panthera, it cannot roar in the same way and instead makes vocalizations such as chuffing and growling.
Common mix-ups include Puma, which contains cougars, and Acinonyx, the genus of the cheetah. Lynx is another separate genus. Panthera is a scientific genus name, so it is conventionally capitalized and italicized in formal writing.