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Late Paleocene Eocene

Cretaceous

Millions of years ago (mya)

Oligocene Miocene

^Pleistocene Pliocene

(a) Eulemur fulvus

(a) Eulemur fulvus

Species Monkeys Lion Tamarin Anatomy

(b) Loris tardigradus

34.25 A Current Phylogeny of the Primates

Too few fossil primates have been discovered to reveal with certainty their evolutionary relationships, but this phylogenetic tree is consistent with the existing evidence.

(a) Leontopithecus rosalia

^Pleistocene Pliocene

(a) Leontopithecus rosalia

Species Monkeys Lion Tamarin Anatomy

(b) Macaca sylvanus

(b) Loris tardigradus

(b) Macaca sylvanus

34.26 Prosimians (a) The brown lemur is one of the many lemur species found in Madagascar, where they are part of a unique assem blage of plants and animals. (b) The slender loris is found in India. Its large eyes tell us that it is nocturnal.

34.27 Monkeys (a) Golden lion tamarins are endangered New World monkeys living in coastal Brazilian rainforests. (b) Many Old World species, such as these Barbary macaques, live in social groups. Here two members of a group groom each other.

Barbary Macaque Skeleton

(a) Gorilla gorilla

(b) Pan troglodytes

34.28 Apes (a) Gorillas, the largest apes, are restricted to humid African forests.This male is a lowland gorilla. (b) Chimpanzees, our closest relatives, are found in forested regions of Africa. (c) Gibbons are the smallest of the apes.The common gibbon is found in Asia, from India to Borneo. (d) Orangutans live in the forests of Indonesia.

(a) Gorilla gorilla

(b) Pan troglodytes

34.28 Apes (a) Gorillas, the largest apes, are restricted to humid African forests.This male is a lowland gorilla. (b) Chimpanzees, our closest relatives, are found in forested regions of Africa. (c) Gibbons are the smallest of the apes.The common gibbon is found in Asia, from India to Borneo. (d) Orangutans live in the forests of Indonesia.

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