Whole-tube zithers
One or more strings are stretched between fixed points. The instrument consists of a rigid string bearer, or of a rigid string bearer with a resonator which is not integral and can be detached without destroying the sound-producing apparatus. The string bearer is a complete tube. The strings are cut from the bark of the tube, remaining attached at each end. Africa and Indonesia (gonra, togo, valiha).
ldiochord (true) tube zithers
Hornbostel - Sachs