Castleguard Cave Stygobromid

The Castleguard Cave Stygobromid (Stygobromus canadensis) is a species of Amphipod of the Crangonyctidae family and Stygobromus genus. It is endemic to Castleguard Cave in Alberta, Canada. It was first described by John Holsinger in 1980. It is currently listed as critically imperiled by NatureServe.