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Cochlear Labyrinth Volume in Euarchontoglirans: Implications for the Evolution of Hearing in Primates
Author(s) -
Armstrong Stephanie D.,
Bloch Jonathan I.,
Houde Peter,
Silcox Mary T.
Publication year - 2011
Publication title -
the anatomical record: advances in integrative anatomy and evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.678
H-Index - 62
eISSN - 1932-8494
pISSN - 1932-8486
DOI - 10.1002/ar.21298
Subject(s) - extant taxon , primate , brain size , inner ear , audiology , anatomy , biology , evolutionary biology , medicine , magnetic resonance imaging , neuroscience , radiology
Abstract Using high resolution X‐ray computed tomography data we examined the relationship between cochlear labyrinth volume and body mass in extant, non‐primate euarchontoglirans, and in two fossils, to allow for comparison with the results of Kirk and Gosselin‐Ildari (2009). Modern primates have significantly higher cochlear labyrinth volumes relative to body mass than other euarchontoglirans, which may be related to a downward shift in the highest and lowest audible frequencies over the course of primate evolution, and to the relative increase in brain size observed in Euprimates. Anat Rec, 2011. © 2010 Wiley‐Liss, Inc.