Pantomorus hirsuticeps is a small Pantomorus similar to P. setulosus. It mainly differentiates because the eyes are less convex, the rostrum more conical, the pronotum more slender regarding the elytra and without basal thickness, and the elytra more globose and short, with more slender and longer setae. The color pattern is similar to that of P. setulosus, but the pronotum has a distinct white stripe on each side of the dark-brown central macula, and the elytra usually have a distinct transversal white stripe on the posterior half.
It was found causing damage on Zea mays L. (Poaceae) in Santiago del Estero.
It is associated with native vegetation of the Chacoan and Yungas biogeographic provinces.