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Chapter 5

ANTHR101 Chapter Notes - Chapter 5: Stereopsis, Adapidae, Apidium


Department
Anthropology
Course Code
ANTHR101
Professor
Francois Larose
Chapter
5

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Group Importance Physical, Behaviour
Plesiadapiforms Controversial
whether or not it
is a primate
ancestor
Some primate, some non-primate features
Carpolestes
simpsoni
Common ancestor
of adapids and
omomyids
No stereoscopic vision, nails (claws), grasping hands
and feet
Adapids
(lemur-like)
Notharctus
Diurnal. Leaf and fruit. Canine sexual dimorphism, 4
premolars characteristic early mammals.
Stereoscopic vision, reduced muzzle, powerful hind
legs
Omomyids
(tarsier-like)
Large yes, long tarsal bones, small. 2 incisors, 3
premolars. Large occipital and temporal lobes
Nocturnal (?), eat insects, fruit.
Catopithecus Emergence of
anthropoids
Detention suggests fruit, insects.
Diurnal.
Agile arboreal quadruped
Parapithecids
(monkey-like)
Apidium (best
known
locomotion –
leaping)
Most believe
preceded split
between old and
New World
Monkeys
(ancestors to
New)
3 premolars each quarter, bony partition between
eye sockets, broad incisors, projecting canines, low
rounded cusps on molars. Prosimian-like premolars
and small brains. Small
Diurnal. Ate fruit and seeds.
Propliothecids
Aegyptopithecu
s
Detention of
modern
catarhines. Teeth
jaws, ~skull ape-
like, rest skeleton
monkey-like
Bony partition between eye sockets, broad incisors,
projecting canines, low rounded cusps on molars.
Occipital large, temporal small. Sexual dimorphism,
skull changed as aged. Long muzzle, small brain.
Quadrupedal, arboreal, ate mostly fruit
Proto-apes
Proconsul
Large, no tail. Arms permitted Brachiation. Arboreal
quadruped. Fruit, larger species ate leaves
Middle
Miocene apes
Teeth and face
more like modern
Pierolapithecus: Brachiation, arboreal. Short
fingers (=modern monkeys)
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