Plecturocebus
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; "Plecturocebus" for the Amazonian and Chaco titis of the "moloch" and "donacophilus" groups; "Cheracebus" for the species of the "torquatus" group ( Widow titis ) ; and "Callicebus" "sensu stricto" , for species of the Atlantic Forest "personatus" group . 
<triplet> Callicebus <subj> Callicebinae <obj> parent taxon