Insights into the palaeobiology of an early Homo infant: multidisciplinary investigation of the GAR IVE hemi-mandible, Melka Kunture, Ethiopia.
Amelogenesis Imperfecta
Animals
Archaeology
/ methods
Biological Evolution
Dental Enamel
/ anatomy & histology
Ethiopia
Female
Fossils
Geography
Head
Hominidae
/ growth & development
Humans
Interdisciplinary Research
Mandible
/ abnormalities
Paleontology
/ methods
Synchrotrons
Tooth
/ growth & development
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
29 11 2021
29 11 2021
Historique:
received:
17
05
2021
accepted:
01
10
2021
entrez:
30
11
2021
pubmed:
1
12
2021
medline:
27
1
2022
Statut:
epublish
Résumé
Childhood is an ontogenetic stage unique to the modern human life history pattern. It enables the still dependent infants to achieve an extended rapid brain growth, slow somatic maturation, while benefitting from provisioning, transitional feeding, and protection from other group members. This tipping point in the evolution of human ontogeny likely emerged from early Homo. The GAR IVE hemi-mandible (1.8 Ma, Melka Kunture, Ethiopia) represents one of the rarely preserved early Homo infants (~ 3 years at death), recovered in a richly documented Oldowan archaeological context. Yet, based on the sole external inspection of its teeth, GAR IVE was diagnosed with a rare genetic disease-amelogenesis imperfecta (AI)-altering enamel. Since it may have impacted the child's survival, this diagnosis deserves deeper examination. Here, we reassess and refute this diagnosis and all associated interpretations, using an unprecedented multidisciplinary approach combining an in-depth analysis of GAR IVE (synchrotron imaging) and associated fauna. Some of the traits previously considered as diagnostic of AI can be better explained by normal growth or taphonomy, which calls for caution when diagnosing pathologies on fossils. We compare GAR IVE's dental development to other fossil hominins, and discuss the implications for the emergence of childhood in early Homo.
Identifiants
pubmed: 34845260
doi: 10.1038/s41598-021-02462-1
pii: 10.1038/s41598-021-02462-1
pmc: PMC8630034
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
23087Informations de copyright
© 2021. The Author(s).
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