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Dental formula of 2.1.3.3 (meaning each quadrant of the mouth has 2 incisors, 1 canine, 3 premolars, and 3 molars). Trichromatic vision. Depending on the species and sex, vision can be monochromatic, dichromatic, or trichromatic. Downward-facing nose and nostrils. Flat, broad nose with sideways-facing nostrils.
Platyrrhines also differ from Old World monkeys in that they have twelve premolars instead of eight; having a dental formula of 2.1.3.3 2.1.3.3 or 2.1.3.2 2.1.3.2 (consisting of 2 incisors, 1 canine, 3 premolars, and 2 or 3 molars).
The dental formula for New World monkeys (Cebidae) is 2(I2/2, C1/1, P3/3, M3/3).1 The formula for Old World monkeys is 2(I2/2, C1/1, P2/2, M3/3) (Fig 1, Table 1).1 Normal times for tooth eruption of selected primates are presented in Table 2.2-4 NHPs rarely allow dental examination without sedation, which may be extended into general anesthesia ...
Platyrrhini are small to medium size monkeys with flat noses, which distinguishes them from Old World monkeys. Other than howler monkeys, they lack the typical trichromatic vision of the Old World monkeys. Marmosets are the smallest New World monkeys. Those used in research, Callithrix jacchus, naturally live in open forest habitats.
The dental formulae of the two families differ from each other and from the dental formulae of Old World monkeys and apes. The formula for marmosets is I2/2; C1/1; P3/3; M2/2 = 32 and for cebid monkeys is I2/2; C1/1; P3/3; M3/3 = 36.
1 sty 2018 · The dental formula of all NW callitrichid monkeys is 2-1-3-2/2-1-3-2, while cebids have 3 molars and 3 premolars, 2-1-3-3/2-1-3-3. The OWM have two premolars and three molars, 2-1-2-3/2-1-2-3. In most species, the canines are sharply pointed and canines in males tend to be longer than those of females.
This chapter provides a description of taxonomy, type of dentition, number of teeth, dental formula, and skull and dental anatomy of higher primates, namely new world monkeys, old world monkeys, yellow baboon, and apes.
