Callicebus (Callicebus) stephennashi van Roosmalen, van Roosmalen and Mittermeier 2002
Callicebus (Callicebus) stephennashi van Roosmalen, van Roosmalen and Mittermeier 2002, Neotropical Primates, 10, suppl.: 15.
Type Locality: Brazil: somewhere along the middle to upper Rio Purus.
Vernacular Names: Stephen Nash's Titi.
Distribution: Brazil: probably along the right bank of the Rio Purus, in between the distributions of C. caligatus and C. dubius (van Roosmalen et al., 2002) .
Conservation: CITES – Appendix II.
Discussion: Subgenus Callicebus . C. cupreus species group.