*'''Acid Tyrants''' have highly acidic blood and employ a large variety of toxic bio-morphs.{{Fn|2a}}

*'''Swarm Tyrants''' are capable of giving birth to clutches of [[Ripper]]s in a similar manner to [[Tervigon]]s and wield large [[Fleshborer]]s.{{Fn|3b}}

*The [[Swarmlord]] is a unique Hive Tyrant created to out-think the enemy when standard Tyranid strategies fail.{{Fn|1b}}