There is no report of another one. Interestingly enough when it emerged, it seemed to have reached its adult stage at a greater rate than usual. Also of note, the existing Xenomorphs of the local hive seemed to be hostile towards the Jock-Xenomorph due to the fact that the Xenomorphs are based on a eusocial society, meaning any change in scent will cause said being (in this case the Jock-Xenomorph) to be unwelcome in the hive. In a similar manner to when a Xenomorph Drone transforms into a Praetorian Guard, the said Xenomorph Warrior produces a scent which is unknown to the hive and the other Xenomorphs of the hive attack said Warrior.