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Stereoscopic vision
• Forward rotation of the orbits.
• Narrow interorbital distance.
• Enlargement of orbital cavity.
• Complete post-orbital bar/plate

Dentition for Order Primates
Quadrituberculate
Bunodont – low &
rounded cusps
Brachydont – low
crowns
2/2 I + 2-3/2-3 PM.

Order Primates
Taxonomy – two lineages
Suborder Strepsirrhini – “lower primates”
Suborder Haplorrhini – “higher primates”

Suborder Strepsirrhini
Infraclass Eutheria
Order Primates
Most families restricted to
Madagascar (two families
occur on continental
Africa, and one extends to
SE Asia)

Family Lemuridae
Infraclass Eutheria
Order Primates
Suborder Strepsirrhini
Lemurs

Suborder Haplorrhini
Infraclass Eutheria
Order Primates

Parvorder Platyrrhini
Infraclass Eutheria
Order Primates
Suborder Haplorrhini

Parvorder Catarrhini
Infraclass Eutheria
Order Primates
Suborder Haplorrhini
Family Cercopithecidae
Family Hominidae
Family Hylobatidae


Family Hylobatidae
Infraclass Eutheria
Order Primates
Suborder Haplorrhini
Parvorder Catarrhini
Gibbons

Family Hominidae
Infraclass Eutheria
Order Primates
Suborder Haplorrhini
Parvorder Catarrhini
Great apes.

Family Cercopithecidae
Infraclass Eutheria
Order Primates
Suborder Haplorrhini
Parvorder Catarrhini
Old World Monkeys like baboons

Family Cynocephalidae
Infraclass Eutheria
Order Dermoptera
Colugos
• Can glide over 100 m
• Skin: dermal membrane from neck to
forelimb digits to hind limb digits to tail

Family Tupaiidae
Infraclass Eutheria
Order Scandentia
tree shrews
Squirrel-like; bushy tail, large
pinnae, but note shrew-like
rostrum
