Gualda-Barros, Juliana, Fabio Oliveira do Nascimento, and Marilia Kerr do Amaral. 2012. “A New Species of Callicebus Thomas, 1903 (Primates, Pitheciidae) from the States of Mato Grosso and Pará, Brazil”. Papéis Avulsos De Zoologia 52 (23): 261-79. https://doi.org/10.1590/S0031-10492012002300001.