Forcipule

Forcipules are the modified, pincer-like, front legs of centipedes that are used to inject venom into prey.

[5][6] and in the specific case in which the forcipules are used to inject venom; toxicognaths (from toxic + the Greek gnathos, jaw),[7] The term forcipule references their similarity with forceps.

[1] Forcipules evolved from the maxillipeds – front legs – of centipedes' last common ancestor, believed to be somewhat Scutigeromorph-like.

They were initially leg-like, then progressed into a more pincer or claw-like shape, as seen today, and restricted to horizontal movement.

[1] The forcipules of modern Scutigeromorphs are the most significantly different in shape: they are more leg-like, and cannot hold prey like they are used among other orders: they are used for envenomation only, making their use more comparable to a knife than a pincer.