The Razor Claw-strain Xenomorph is another large breed of Xenomorph, with a purple coloration and large, sharp claws on its fingers. It's known for its speed, being hard to even keep up with. It's fond of using that speed to make dash attacks, in which it uses its namesakes to slice its victims in half.
They are the result of a genetic malfunction in the cocoon process. The other Razor Claws are destroyed when the ships destroys the base where the aliens are kept, although due to the fact that they are a genetic malfunction, they may in fact occur elsewhere in the galaxy.