Editing Squirrel monkey (section)

=== Taxonomy ===
Until 1984, all South American squirrel monkeys were considered part of a single widespread species, and many zoologists considered the Central American squirrel monkey to be a member of that single species as well.<ref name="msw3" /><ref name=":1">{{cite book|title=A Complete Guide to Monkeys, Apes and Other Primates|author=Kavanagh, Michael|year=1983|page=[https://archive.org/details/completeguidetom0000kava/page/84 84]|isbn=978-0-224-02168-5|url=https://archive.org/details/completeguidetom0000kava/page/84}}</ref> The two main groups currently recognized can be separated by the white above the eyes; it is shaped as a [[Gothic architecture|Gothic]] ("pointed") arch in the ''S. sciureus'' group, while it is shaped as a [[Roman architecture|Roman]] ("rounded") arch in the ''S. boliviensis'' group.<ref>{{cite book |author=Rowe, N. |year=1996 |title=The Pictorial Guide to the Living Primates |publisher=Pogonia Press, Charlestown, Rhode Island |isbn=978-0-9648825-0-8 |url-access=registration |url=https://archive.org/details/pictorialguideto0000rowe }}</ref> ''Mammal Species of the World'' (2005) recognized five species.<ref name="msw3"/> 

Subsequent taxonomic research has recognized ''Saimiri sciureus cassiquiarensis'' as a separate species ''[[Saimiri cassiquiarensis]]'', and also recognized an additional species, [[Collins' squirrel monkey]] ''Saimiri collinsi'' that had previously been considered to be within ''S. sciureus''.<ref>{{cite journal|title=Morphology and mitochondrial phylogenetics reveal that the Amazon River separates two eastern squirrel monkey species: Saimiri sciureus and S. collinsi|author=Merces, Michelle P. |author2=Lynch Alfaro, Jessica W. |display-authors=etal |journal=Molecular Phylogenetics and Evolution|volume=82|issue=B|date=January 2015|pages=426–435|doi=10.1016/j.ympev.2014.09.020|pmid=25451802|bibcode=2015MolPE..82..426M }}</ref>  Some more recent taxonomies also recognize ''Saimiri sciureus macrodon'' as a separate species ''Saimiri macrodon'', but others recognize ''S. macrodon'' to be a synonym of ''Saimiri cassiquiarensis''.<ref>{{cite journal|title=Biogeography of squirrel monkeys (genus ''Saimiri''): South-central Amazon origin and rapid pan-Amazonian diversification of a lowland primate|author=Lynch Alfaro, J.W. |display-authors=etal |pages=436–454|journal=Molecular Phylogenetics and Evolution|volume=82|year=2015|doi=10.1016/j.ympev.2014.09.004|pmid=25305518 |doi-access=free|bibcode=2015MolPE..82..436L }}</ref><ref>{{cite web|title=Saimiri|url=https://www.itis.gov/servlet/SingleRpt/SingleRpt|publisher=ITIS|access-date=2019-01-12}}</ref><ref>{{cite web|title=Saimiri|url=https://mammaldiversity.org/#c2FpbWlyaSZnbG9iYWxfc2VhcmNoPXRydWUmbG9vc2U9dHJ1ZQ|publisher=Mammal Diversity Database|access-date=2019-01-12}}</ref><ref>{{cite journal|title=The Taxonomy and Conservation Status of Saimiri sciureus albigena: A Squirrel Monkey Endemic to Colombia |author=Carretero-Pinzón, X. |author2=Ruiz-García, M. |author3-link=Thomas Defler |author3=Defler, T.|s2cid=85881653 |url=https://www.researchgate.net/publication/228369497|journal=Primate Conservation|volume=24|pages=59–64|year=2009|access-date=2019-01-13|doi=10.1896/052.024.0102 |doi-access=free}}</ref>

* '''Genus ''Saimiri'''''
** ''S. sciureus'' group
*** [[Central American squirrel monkey]], ''Saimiri oerstedii''
**** [[Black-crowned Central American squirrel monkey]], ''Saimiri oerstedii oerstedii''
**** [[Grey-crowned Central American squirrel monkey]], ''Saimiri oerstedii citrinellus''
*** [[Guianan squirrel monkey]], ''Saimiri sciureus''
**** ''Saimiri sciureus sciureus''
**** ''Saimiri sciureus albigena''
**** [[Ecuadorian squirrel monkey]], ''Saimiri sciureus macrodon''
*** [[Humboldt's squirrel monkey]], ''Saimiri cassiquiarensis''
*** [[Bare-eared squirrel monkey]], ''Saimiri ustus''
*** [[Collins' squirrel monkey]], ''Saimiri collinsi''
** ''S. boliviensis'' group
*** [[Black-capped squirrel monkey]], ''Saimiri boliviensis''
**** Bolivian squirrel monkey, ''Saimiri boliviensis boliviensis''
**** Peruvian squirrel monkey, ''Saimiri boliviensis peruviensis''
*** [[Black squirrel monkey]], ''Saimiri vanzolinii''
** [[List of fossil primates of South America|Fossil species]]
*** †''[[Saimiri annectens]]'', [[Honda Group, Colombia|Honda Group]], Kay and Meldrum 1997<ref name=PDBSaimiri/>
*** †''[[Saimiri fieldsi]]'', Honda Group, Stirton 1951<ref name=PDBSaimiri/>