Specialized teams of Gauntii subspecies were first encountered in 3.652.009M42 in the Psylona Secundus system, and have since been sighted across the Karthago Reach.
Their unique adaptations and mode of attack have only intensified rumours among imperial forces in the sector, and as such these subspecies have been assigned the moniker "The Masked Breachers of Psylona Secundus."