The species was first identified in 1882 by George Boulenger and named after the German-born British zoologist Albert Günther.

[3] Nannophrys guentheri was a small species, with snout to vent length given as 28.5 mm for males.

The tips of fingers are pointed, while the toes have a short, but very distinct web at the base.

The hind limb being carried forwards along the body the tibiotarsal articulation reaches the tip of the snout.

A fold of the skin unites the posterior edges of the upper eyelids, and extends from the eye, over the tympanum and to the shoulder.