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Echoes from the past: New insights into the early hominin cochlea from a phylo-morphometric approach

Braga, José and Bouvier, Priscille and Romeyer Dherbey, Jordan and Balaresque, Patricia and Risser, Laurent and Loubes, Jean-Michel and Dumoncel, Jean and Duployer, Benjamin and Tenailleau, Christophe Echoes from the past: New insights into the early hominin cochlea from a phylo-morphometric approach. (2017) Comptes Rendus Palevol, 16 (5-6). 508-520. ISSN 1631-0683

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Official URL: http://dx.doi.org/10.1016/j.crpv.2017.02.003

Abstract

We investigate cochlear variation, an indirect evidence of auditory capacities among earlyhominins and extant catarrhine species, in order to assess (i) the phylogenetic signal ofrelative external cochlear length (RECL) and oval window area (OWA), (ii) the evolution-ary model with the highest probability of explaining our observed data, (iii) some homininancestral nodes for RECL and OWA. RECL has a high phylogenetic signal under a Brown-ian motion model, and is closely correlated with body mass. Our model-based methodhas the advantage over parsimony-based methods of incorporating branch lengths in aphylo-morphospace, and this shows RECL shifted towards significantly higher values atthe Homo erectus-Homo sapiens node. We also observe that the StW 53 and KB 6067 fossilspecimens from Sterkfontein and Kromdraai likely represent one or two distinct, smaller-bodied and less derived hominin form(s) compared to Paranthropus specimens representedat Swartkrans.

Item Type:Article
Additional Information:This is an open accessarticle under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Thanks to Elsevier editor. The original PDF of the article can be found at : https://www.sciencedirect.com/science/article/pii/S1631068317300374?via%3Dihub
HAL Id:hal-01754860
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of the Witwatersrand - WITS (SOUTH AFRICA)
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Funders:
French Ministry of Foreign Affairs - Centre national de la recherche scientifique - South AfricanNational Research Foundation
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Deposited By: cirimat webmestre
Deposited On:30 Mar 2018 09:17

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