Scything Talons & Rending Claws

Tyranid creatures with scything talons count as having two close combat weapons and so gain +1 Attack. Creatures with two sets of scything talons gain +2 Attacks in close combat instead of +1. No more than +2 Attacks can be gained in this way an the number of attacks from ranged weapon-symbiotes is not increased. Note that this is  the only way that Tyranids gain extra attacks in close combat for multiple weapons.

Tyranids with rending claws gain the Rending ability for all their close combat attacks.