Among its characteristics, "its smooth scales on the head, which lack grooves or roughness, and the eyelids with an undivided translucent disc" stand out, the agency reported.

Males have a dark gray to black neck, breast, and belly, while females have a pale gray neck, breast, and belly with a diffused dark gray.

Peruvian authorities say that there are 20 species of Proctoporus, of which 18 are found in Peru. The discovery was made by a team of five researchers.