Bilaterally symmetrical animals
SUBORDER: Haplorrhines
The haplorrhini are dry nosed primates.
Haplorrhines have lost the ability to manufacture vitamin C within their bodies unlike most other mammals.
Haplorrhines have upper lips independent from their nose and gums.
Haplorrhines have a notably developed sense of vision.
Many haplorrhines developed into being diurnal, which is the opposite to nocturnal.
The differences between hands and feet became more apparent with haplorrhines as the hind legs took even more preference to being the legs which these primates used prominently for walking.
Haplorrhini offspring are further developed at birth than strepsirrhini offspring. However, haplorrihini offspring are maternally dependent for longer than their strepsirrhini equivalent.
Haplorrhini and strepsirrhini are believed to be first distinguishable from each other around 58 million years ago.
The two infraorders which stem from all original haplorrhines are tarsiiformes and simiiformes.
The only tarsiiformes known to be alive today are the tarsiers.
The simiiformes contain all old and new world monkeys and the apes.
Humans are simiiformes.
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TARSIIFORMES Tarsiers and their closest extinct relatives. |
New world monkeys, old world monkeys and apes. |
