The New World monkeys or Platyrrhines are the four families of primates that are found in Central and South America, the Cebidae, Nyctipithecidae, Pitheciidae and Atelidae. All families differ from the Old World monkeys and apes in having long, often prehensile tails. The name means "flat nosed", and this is how they are distinguished from Old World monkeys. Platyrrhine noses are flatter, with side facing nostrils, compared to the narrow noses and downward facing nostrils of Old World Monkeys. Many are small, arboreal and nocturnal, so our knowledge of them is less comprehensive than that of the more easily observed Old World monkeys. Unlike most Old World monkeys, many New World monkeys form monogamous pair bonds, and show substantial paternal care of young.
The four families are ranked together as the Platyrrhini parvorder.
The scientific name for New world monkey, Platyrrhini, means "flat nosed", therefore the noses are flatter, with side facing nostrils, compared to the narrow noses of the Old Worldmonkey.
Wiesemüller, Bernhard: Phylogenetische Untersuchungen an Schädeln der Neuweltaffen (Platyrrhini)
Skull measurements were taken from 160 Platyrrhini, 54 Catarrhini, and ten Tarsius, predominantly at the Field Museum, Chicago.
In der vorliegenden Studie wurde das statistische Verfahren der Q-Faktorenanalyse mit Varimax-Rotation (siehe z.B. BORTZ, 1993) angewandt, um komplexe Merkmale aus Schädelmaßen der Neuweltaffen (Platyrrhini) und verwandter Taxa zu ermitteln.