Cheracebus is one of three genera of titi monkeys. Monkeys in this genus, particularly the type species Cheracebus lugens, are sometimes referred to as widow titi monkeys.
Historically, titis were monogeneric, comprising only the genus Callicebus <small>Thomas, 1903</small>. Owing to the great diversity found across titi monkey species, a new genus-level taxonomy was recently proposed that recognises three genera within the subfamily Callicebinae; Cheracebus <small>Byrne et al., 2016</small> for the species of the torquatus group (Widow titis); Plecturocebus <small>Byrne et al., 2016</small> for the Amazonian and Chaco titis of the moloch and donacophilus groups; and Callicebus <small>Thomas, 1903</small> sensu stricto, for species of the Atlantic Forest personatus group.
Cheracebus is derived from the Latin chera (from the Greek ) meaning widow and cebus (from the Greek ) meaning long tailed monkey.
There are 5 species in this genus: