[3] The species has a blunt snout, with large and smooth scales on the head.

[4] There is no sexual dimorphism in color and three black lines radiate from each eye.

In Peru, Polychrus liogaster has been confirmed to be present in La Convención and Bajo Puyantimarí.

In Bolivia, the species has been confirmed in Marbán, Ichilo, and Santa Cruz.

[5] The species' range in Brazil includes Amazonas, Acre, Mato Grosso, and Rondônia.