Utah State University Extension
Subterranean termites are social insects with a caste system, and belong to the order Isoptera and family Termititae. These termites are closely related to drywood (Kalotermitidae) and dampwood (Termopsidae) termites.
Frank, Erin and Evans, Kent, "Take-all Patch in Turf" (2009). All Current Publications. Paper 966.