The second, C. bernhardi (Callicebus moloch species
group), was based on three specimens from the region
between the Madeira-Ji-Paraná and the Roosevelt-
Aripuanã rivers. Wallace et al. (2006) described
C. aureipalatti (Callicebus cupreus species group),
discovered in the Madidi conservation area, located
north of the Departmento de La Paz, northwestern
Bolivia. The description was based on two specimens
collected in the region of the Hondo River and on
field observations. Defler et al. (2010) described
C. caquetensis (Callicebus cupreus species group) based
on two collected specimens, and on 13 social groups
observed in the field. The new species was registered
in 11 locations between the Orteguaza and Caquetá
rivers, Colombia (Defler et al., 2010). Gualda-Barros
et al. (2012) described C. vieirai (Callicebus moloch
species group) based on four museum specimens and
on two specimens observed in the field.