Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Callicebus personatus (É.Geoffroy Saint-Hilaire, 1812))
Callicebus personatus nigrifrons Spix 1823
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Callicebus personatus (É.Geoffroy Saint-Hilaire, 1812))