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High-resolution computed tomography study of the cranium of a fossil anthropoid primate, Parapithecus grangeri: New insights into the evolutionary history of primate sensory systems

Bush, Eliot C. and Simons, Elwyn L. and Allman, John M. (2004) High-resolution computed tomography study of the cranium of a fossil anthropoid primate, Parapithecus grangeri: New insights into the evolutionary history of primate sensory systems. The Anatomical Record, 281A (1). pp. 1083-1087. ISSN 0003-276X. https://resolver.caltech.edu/CaltechAUTHORS:20200720-124523454

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Abstract

Extant anthropoids have large brains, small olfactory bulbs, and high‐acuity vision compared with other primates. The relative timing of the evolution of these characteristics may have important implications for brain evolution. Here computed tomography is used to examine the cranium of a fossil anthropoid, Parapithecus grangeri. It is found that P. grangeri had a relatively small brain compared with living primates. In addition, it had an olfactory bulb in the middle of the range for living primates. Methods for relating optic foramen area and other cranial measurements to acuity are discussed. Multiple regression is used to estimate retinal ganglion cell number in P. grangeri. Given currently available comparative data, P. grangeri seems to have had retinal ganglion cell counts intermediate for living primates, overlapping with the upper end of the range for strepsirrhines and possibly with the lower end for anthropoids.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/ar.a.20113DOIArticle
Additional Information:© 2004 Wiley‐Liss, Inc. Version of Record online: 06 October 2004. Manuscript accepted: 01 July 2004. Manuscript received: 20 May 2004. Grant sponsor: the National Institutes of Health; Grant number: EY11759; Grant sponsor: W.M. Keck Foundation for Discovery in Basic Medical Research at the California Institute of Technology; Grant sponsor: Frank V. Hixon Fund. The authors thank Matthew Colbert for assistance with scanning, as well as Chris Kirk, Richard Kay, and Tim Smith for suggestions regarding the analysis. This is Duke Primate Center publication number 787.
Funders:
Funding AgencyGrant Number
NIHEY11759
W. M. Keck FoundationUNSPECIFIED
Frank V. Hixon FundUNSPECIFIED
Subject Keywords:optic foramen; acuity; olfactory bulbs; endocranial volume
Issue or Number:1
Record Number:CaltechAUTHORS:20200720-124523454
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200720-124523454
Official Citation:Bush, E.C., Simons, E.L. and Allman, J.M. (2004), High‐resolution computed tomography study of the cranium of a fossil anthropoid primate, Parapithecus grangeri : New insights into the evolutionary history of primate sensory systems. Anat. Rec., 281A: 1083-1087. doi:10.1002/ar.a.20113
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104451
Collection:CaltechAUTHORS
Deposited By: Rebecca Minjarez
Deposited On:21 Jul 2020 15:37
Last Modified:21 Jul 2020 15:37

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