Despite their appearance, Xenodae are extremely misunderstood.
These Felidae have long, sharp teeth and claws. It is commonly inferred that they evolved from saber-toothed cats, but it is actually the other way around; saber-toothed cats evolved from THEM. They are quick to attack and are always fighting among themselves. Even though they are mean looking, they can actually be quite nice.
These cats live on the planet Survivilia, a vicious, carnivorous world. When the first Felidaeus ran onto the Asteroid, a few of these cats got trapped and were stuck on earth, and then evolved into saber-toothed cats.