Ectocranial suture closure in Pan troglodytes and Gorilla gorilla: Pattern and phylogeny
Article first published online: 18 MAR 2008
Copyright © 2008 Wiley-Liss, Inc.
American Journal of Physical Anthropology
Volume 136, Issue 4, pages 394–399, August 2008
How to Cite
Cray, J., Meindl, R. S., Sherwood, C. C. and Lovejoy, C. O. (2008), Ectocranial suture closure in Pan troglodytes and Gorilla gorilla: Pattern and phylogeny. Am. J. Phys. Anthropol., 136: 394–399. doi: 10.1002/ajpa.20821
- Issue published online: 8 JUL 2008
- Article first published online: 18 MAR 2008
- Manuscript Accepted: 24 JAN 2008
- Manuscript Received: 3 SEP 2007
- cranial suture;
- Guttman analysis
The order in which ectocranial sutures undergo fusion displays species-specific variation among primates. However, the precise relationship between suture closure and phylogenetic affinities is poorly understood. In this study, we used Guttman Scaling to determine if the modal progression of suture closure differs among Homo sapiens, Pan troglodytes, and Gorilla gorilla. Because DNA sequence homologies strongly suggest that P. troglodytes and Homo sapiens share a more recent common ancestor than either does with G. gorilla, we hypothesized that this phylogenetic relationship would be reflected in the suture closure patterns of these three taxa. Results indicated that while all three species do share a similar lateral-anterior closure pattern, G. gorilla exhibits a unique vault pattern, which, unlike humans and P. troglodytes, follows a strong posterior-to-anterior gradient. P. troglodytes is therefore more like Homo sapiens in suture synostosis. Am J Phys Anthropol, 2008. © 2008 Wiley-Liss, Inc.