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Biography
Other usesdistinguish|SimienTaxobox| name = SimianMSW3 Groves|pages=128-184 |id=12100177|heading=INFRAORDER SIMIIFORMES| fossil_range = Middle Eocene – Recent| image = White-handed Gibbon Hylobates lar Orange 1900px.jpg| image_caption = Lar gibbon | regnum = Animal ia| phylum = Chordata | classis = Mammal ia| ordo = Primate s| subordo = Haplorrhini | infraordo = Simiiformes | infraordo_authority = Ernst Haeckel|Haeckel , 1866| subdivision_ranks = Family (biology)|Families | subdivision = Callitrichidae
Cebidae
Aotidae
Pitheciidae
Atelidae
Cercopithecidae
Hylobatidae
Hominidae The simians ( infraorder Simiiformes ) are the "higher primate s" familiar to most people: the Old World monkey s and ape s, including humans, (together being the catarrhines ), and the New World monkey s or platyrrhines. Simians tend to be larger than the "lower primates" or prosimian s.Citation needed|date=September 2011
Classification and evolution
The simians are split into three groups. The New World monkey s in parvorder Platyrrhini split from the rest of the simian line about 40& nbsp; Year#Symbols_y_and_yr|mya , leaving the parvorder Catarrhini occupying the Old World. This group split about 25& nbsp;mya between the Old World monkeys and the apes. " Monkey s" are a paraphyletic group (i.e. not a single coherent group). Earlier classifications split the primates into two large groups: the "Prosimii" ( strepsirrhine s and tarsier s) and the simians in " Anthropoidea " /an'thro-poy'de-a/ (Gr. anthropos , human).
The following is the listing of the various simian families, and their placement in the order Primates:cite book | author = Rylands AB and Mittermeier RA | title = South American Primates: Comparative Perspectives in the Study of Bahavior, Ecology, and Conservation | chapter = The Diversity of the New World Primates (Platyrrhini) | publisher = Springer | editor = Garber PA, Estrada A, Bicca-Marques JC, Heymann EW, Strier KB | isbn = 978-0-387-78704-6 | year = 2009
