Dental morphology in Homo habilis and its implications for the evolution of early Homo
Thomas W. Davies (),
Philipp Gunz,
Fred Spoor,
Zeresenay Alemseged,
Agness Gidna,
Jean-Jacques Hublin,
William H. Kimbel,
Ottmar Kullmer,
William P. Plummer,
Clément Zanolli and
Matthew M. Skinner
Additional contact information
Thomas W. Davies: Max Planck Institute for Evolutionary Anthropology
Philipp Gunz: Max Planck Institute for Evolutionary Anthropology
Fred Spoor: Max Planck Institute for Evolutionary Anthropology
Zeresenay Alemseged: University of Chicago
Agness Gidna: Ngorongoro Conservation Area Authority
Jean-Jacques Hublin: Collège de France
William H. Kimbel: Arizona State University
Ottmar Kullmer: Goethe University
William P. Plummer: University of Kent
Clément Zanolli: Univ. Bordeaux, CNRS, MCC, PACEA, UMR 5199
Matthew M. Skinner: University of Kent
Nature Communications, 2024, vol. 15, issue 1, 1-16
Abstract:
Abstract The phylogenetic position of Homo habilis is central to debates over the origin and early evolution of the genus Homo. A large portion of the species hypodigm consists of dental remains, but they have only been studied at the often worn enamel surface. We investigate the morphology of the H. habilis enamel-dentine junction (EDJ), which is preserved in cases of moderate tooth wear and known to carry a strong taxonomic signal. Geometric morphometrics is used to characterise dentine crown shape and size across the entire mandibular and maxillary tooth rows, compared with a broad comparative sample (n = 712). We find that EDJ morphology in H. habilis is for the most part remarkably primitive, supporting the hypothesis that the H. habilis hypodigm has more in common with Australopithecus than later Homo. Additionally, the chronologically younger specimen OH 16 displays a suite of derived features; its inclusion in H. habilis leads to excessive levels of variation.
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-44375-9
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DOI: 10.1038/s41467-023-44375-9
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