Editing Spider monkey (section)

==Evolutionary history==
Theories abound about the evolution of the [[Atelinae|atelines]]; one theory is they are most closely related to the [[Muriqui|woolly spider monkey]]s (''Brachyteles''), and most likely split from woolly monkeys (''[[Lagothrix]]'') in the South American lowland forest, to evolve their unique locomotory system.<ref name="Kinzey1997">{{cite book |author=Kinzey, W.G. |title=New world primates: ecology, evolution, and behavior |publisher=Aldine Transaction |year=1997 |isbn=978-0-202-01186-8}}</ref> This theory is not supported by fossil evidence. Other theories include ''[[Brachyteles]]'', ''Lagothrix'' and ''Ateles'' in an unresolved [[Speciation|trichotomy]],<ref>{{cite book |author=Ford, S.M. |year=1986 |chapter=Systematics of the New World monkeys |title=Comparative Primate Biology, Volume I: Systematics, Evolution and Anatomy |editor=Swindler, D.R. |editor2=Erwin, J. |pages=73–135 |publisher=Alan R. Liss |location=New York}}</ref> and two clades, one composed of ''Ateles'' and ''Lagothrix'' and the other of ''[[Alouatta]]'' and ''Brachyteles''.<ref>{{cite journal |author=Kay, R.F. |year=1990 |title=The phyletic relationships of extant and fossil Pitheciinae (Platyrrhini, Anthropoidea) |journal=[[Journal of Human Evolution]] |volume=19 |issue=1–2 |pages=175–208 |doi=10.1016/0047-2484(90)90016-5|bibcode=1990JHumE..19..175K }}</ref> More recent molecular evidence suggests the Atelinae split in the middle to late [[Miocene]] (13 [[Megaannum|Ma]]), separating spider monkeys from the woolly spider monkeys and the woolly monkeys.<ref>{{cite journal |author=Schneider, H. |title=The current status of the New World monkey phylogeny |journal=Anais da Academia Brasileira de Ciências |volume=72 |year=2000 |doi=10.1590/S0001-37652000000200005 |issue=2 |pages=165–172 |pmid=10932115 |doi-access=free}}</ref>