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Anatomy Research International
Volume 2011 (2011), Article ID 948671, 12 pages
Research Article

A Comparative Study of Growth Patterns in Crested Langurs and Vervet Monkeys

Department of Anthropology, Modesto College, 435 College Avenue, Modesto, CA 95350, USA

Received 14 October 2010; Accepted 21 December 2010

Academic Editor: Kathleen M. Muldoon

Copyright © 2011 Debra R. Bolter. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The physical growth patterns of crested langurs and vervet monkeys are investigated for several unilinear dimensions. Long bone lengths, trunk height, foot length, epiphyseal fusion of the long bones and the pelvis, and cranial capacity are compared through six dental growth stages in male Trachypithecus cristatus (crested langurs) and Cercopithecus aethiops (vervet monkeys). Results show that the body elements of crested langurs mature differently than those of vervets. In some dimensions, langurs and vervets grow comparably, in others vervets attain adult values in advance of crested langurs, and in one feature the langurs are accelerated. Several factors may explain this difference, including phylogeny, diet, ecology, and locomotion. This study proposes that locomotor requirements affect differences in somatic growth between the species.