Suborder Strepsirrhini
(means “wet nose”)
Suborder Haplorrhini
Infraorder Simiiformes
Parvorder Platyrrhini
New World Monkeys
All in Parvorder Platyrrhini
Marmosets and tamarins in Family Callitrichidae.
Squirrel monkeys and Capuchins in Family Cebidae.

Callithrix jacchus jacchus

Suborder Haplorrhini
Infraorder Tarsiiformes
Genus Tarsius
Shares characteristics of both Strepsirrhini and Simiiformes.
Like Strepsirrhini: nocturnal, grooming claws (3rd digit)
Like Simiiformes: lack tapetum lucidum, closed eye sockets, sex skin tumescence, hemochorial placenta

Suborder Strepsirrhini
Family Lemuridae
Lemur catta
Callithrix aurita, C. flaviceps
Sanguinus bicolor, S. geoffroyi, S. leucopus, S. oedipus

Have prominent incisors same length as canines. These allow them to gnaw holes in trees and eat gums and exudates, a staple of their diet.

Callithrix jacchus, Common Marmoset
Model for Parkinson’s disease
Model fpr allergic encephalomyelitis, which mimics many facets of multiple sclerosis
Models for idiopathic hemochromatosis
Health status of mice must be known. Lymphocytic choriomeningitis virus can be transmitted to marmosets and tamarins.

family Cebidae
Aotus lemurinus griseimemra
Gray-necked owl monkey
28 days
161-175 days
140-150 days

family Cebidae
Saimiri sciureus
Note high Gothic arch. Could also be S. oerstedii or S. ustus. Precise identification requires both phenotypic and karyotypic examination.
28.6-30.1 days
2n = 44
Vary in number of acrocentric chromosomes (5-7), thought to be due to pericentric inversions.
Karyotyping is critically important because: