Cranial evolution in sakis (Pithecia, Platyrrhini) I: interspecific differentiation and allometric patterns

American Journal of Physical Anthropology
G Marroig, J M Cheverud

Abstract

Patterns of interspecific differentiation in saki monkey (Pithecia) skulls are quantitatively described. The taxonomic arrangement previously proposed by Hershkovitz ([1987] Am. J. Primatol. 12:387-468) is consistent with quantitative differences in saki morphology. Discriminant analyses on 39 skull traits show that Pithecia species and subspecies are well-differentiated. Morphological distances (D2) among sakis clearly show the morphological unity of the pithecia-chrysocephala (Pithecia) and irrorata-vanzolinii-monacha (Monacha) species groups. The Pithecia species group is distributed north of the Amazon and has a smaller cranium than the Monacha group, distributed south of that river. Despite the size difference, multivariate static allometric patterns among sakis are quite similar. After removing size and allometric changes in shape from the data, species and subspecies are still differentiated, although to a lesser extent. D2 distances obtained from these scale-corrected data are similar in magnitude and pattern to the original D2, but show a closer similarity of P. monacha with the Pithecia group. P. monacha is a scaled-up version of the smaller sakis.

References

Oct 1, 1982·American Journal of Physical Anthropology·J M Cheverud
Jun 22, 2000·Journal of Theoretical Biology·J LleonartG J Torres
Dec 19, 2001·American Journal of Primatology·J C ViéC Fournier-Chambrillon
Dec 12, 2003·American Journal of Physical Anthropology·Gabriel MarroigJames M Cheverud
Jan 1, 1989·Evolution; International Journal of Organic Evolution·William R Rice
Oct 1, 1997·Evolution; International Journal of Organic Evolution·Kathleen K Smith

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Citations

Jul 9, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·A GoswamiP D Polly
Oct 25, 2013·Evolution; International Journal of Organic Evolution·Arthur PortoGabriel Marroig
Jul 1, 2011·International Journal of Evolutionary Biology·Joshua M Polanski
Jan 15, 2008·Journal of Human Evolution·Andrea Cardini, Sarah Elton
Dec 6, 2008·Evolution; International Journal of Organic Evolution·S Ivan Perez, Leandro R Monteiro
Feb 24, 2012·Journal of Evolutionary Biology·A GoswamiM R Sánchez-Villagra
Jul 17, 2016·Molecular Phylogenetics and Evolution·Ana Carolina Pavan, Gabriel Marroig
Jul 1, 2017·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Nataša Tomašević KolarovAna Ivanović
Jul 14, 2010·American Journal of Physical Anthropology·Charles C RosemanJames M Cheverud
Mar 23, 2006·American Journal of Physical Anthropology·Joshua M Polanski, Robert G Franciscus
Nov 2, 2019·American Journal of Physical Anthropology·Mikel ArlegiAsier Gómez-Olivencia
May 22, 2021·Journal of Human Evolution·Hyunwoo JungNoreen von Cramon-Taubadel

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