Plecturocebus

Plecturocebus is one of three genera of titi monkeys.

Historically, these monkeys were monogeneric, being placed in a single genus: Callicebus Thomas, 1903. Owing to the great diversity found across titi monkey species, a new genus-level taxonomy was proposed in 2016 that recognises three genera within the subfamily Callicebinae; Plecturocebus Byrne et al., 2016 for the Amazonian and Chaco titis of the moloch and donacophilus groups; Cheracebus Byrne et al., 2016 for the species of the torquatus group (Widow titis); and Callicebus Thomas, 1903 sensu stricto, for species of the Atlantic Forest personatus group.

Plecturocebus is derived from the Latin forms of three Greek words: plektos, meaning twist or plait, oura, meaning tail, and kebos, meaning long-tailed monkey. All together, this refers to the behavior of many titi monkeys to intertwine their tails when they sit next to each other.

Species
There are 25 species in this genus:
 * P. donacophilus group
 * White-eared titi monkey, Plecturocebus donacophilus
 * Rio Beni titi monkey, Plecturocebus modestus
 * Rio Mayo titi monkey, Plecturocebus oenanthe
 * Olalla brothers' titi monkey, Plecturocebus olallae
 * White-coated titi monkey, Plecturocebus pallescens
 * Urubamba brown titi monkey, Plecturocebus urubambensis
 * P. moloch group
 * Madidi titi monkey, Plecturocebus aureipalatii
 * Baptista Lake titi monkey, Plecturocebus baptista
 * Prince Bernhard's titi monkey, Plecturocebus bernhardi
 * Brown titi monkey, Plecturocebus brunneus
 * Chestnut-bellied titi monkey, Plecturocebus caligatus
 * Caquetá titi monkey, Plecturocebus caquetensis
 * Ashy black titi monkey, Plecturocebus cinerascens
 * Coppery titi monkey, Plecturocebus cupreus
 * White-tailed titi monkey, Plecturocebus discolor
 * Hershkovitz's titi monkey, Plecturocebus dubius
 * Alta Floresta titi monkey, Plecturocebus grovesi
 * Hoffmanns's titi monkey, Plecturocebus hoffmannsi
 * Milton's titi monkey, Plecturocebus miltoni
 * Red-bellied titi monkey, Plecturocebus moloch
 * Ornate titi monkey, Plecturocebus ornatus
 * Parecis titi monkey, Plecturocebus parecis
 * Stephen Nash's titi monkey, Plecturocebus stephennashi
 * Toppin's titi monkey, Plecturocebus toppini
 * Vieira's titi monkey, Plecturocebus vieirai