Attributes / relations provided by
♦ ¹del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ²Abundance, habitat use and diet of Callicebus nigrifrons Spix (Primates, Pitheciidae) in Cantareira State Park, São Paulo, Brazil, Leonardo C. Trevelin; Marcio Port-Carvalho; Maurício Silveira & Eduardo Morell, Revista Brasileira de Zoologia 24 (4): 1071–1077, dezembro 2007