A reappraisal of the Border Cave 1 cranium (KwaZulu-Natal, South Africa)

Amélie Beaudet, d'Errico Francesco d'Errico, Lucinda Backwell, Lyn Wadley, Bernhard Zipfel, Paloma de la Peña, Hugo Reyes-Centeno

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Besides providing a unique archaeological assemblage that documents the early emergence of complex behaviour in the human lineage, Border Cave (South Africa) is noteworthy for having yielded hominin remains of at least nine individuals, including the partial cranium Border Cave 1. While the exact provenance of Border Cave 1 is unknown, sequence stratigraphy and ESR dating converge towards an age from about 82 ka to 170 ka. Here we present novel information about the brain, braincase and bony labyrinth of Border Cave 1 and discuss related evolutionary implications. We compare Border Cave 1 to specimens of Early and Middle Pleistocene Homo as well as to fossil and extant Homo sapiens. Virtual segmentation techniques were used to reconstruct the brain and bony labyrinth endocasts, assess the distribution of cranial bone thickness, and identify the vascular and sulcal imprints preserved on the inner surface of the braincase. Our results show that the overall morphology of the brain endocast approximates the globular shape of the modern human brain and differs from the long and low brains seen in Middle Pleistocene fossil hominins. The vascular imprints preserved on the right hemisphere indicate that the middle branch derives from the anterior branch, which is a pattern shared with Neanderthals and modern humans. Bone thickness distribution in the Border Cave 1 cranium resembles the patterns seen in Cro-Magnon 1 and Abri Pataud 1, which both share a diffuse distribution of thickened areas over the frontal region. Finally, the relative size and curvature of the semicircular canals of the bony labyrinth conform to the ancestral configuration shared between Early and Late Pleistocene fossil hominins from Africa and the Levant, as well as modern humans, and distinct from the more derived condition documented within Neanderthals. We discuss the implications of our findings for understanding the biogeography, evolution, and, to some extent, behaviour of fossil Homo sapiens.

Original languageEnglish
Article number107452
JournalQuaternary Science Reviews
Volume282
DOIs
StatePublished - Apr 15 2022

Bibliographical note

Funding Information:
We thank the Fossil Access Advisory Panel and the Evolutionary Studies Institute (University of the Witwatersrand) for access to Border Cave 1, and Gideon Chinamatira for X-ray microtomographic acquisitions. We sincerely thank the Digital Archive of Fossil Hominoids team (https://www.virtual-anthropology.com/) and the Rising Star team (MorphoSource project ‘Rising Star’ ID 00000C124) for sharing data. We are grateful to the following institutions for their financial support: Bordeaux University, Centre for Early Sapiens Behaviour, DSI-NRF Centre of Excellence in Palaeosciences (Genus) (CEOOP 2020-1), National Geographic Society (NGS-54810R-19), Grand Programme de Recherche ‘Human Past’ of the University of Bordeaux Initiative d'Excellence, National Research Foundation of South Africa (#129336), University of Bordeaux Programme Talents (Grant No. 191022–001), Research Council of Norway through its Centre's of Excellence funding scheme, SapienCE (Project No. 262618), and National Science Foundation (#2131940-EduceLab: Infrastructure for Next-Generation Heritage Science). We thank the Editors, Antoine Balzeau and one anonymous reviewer for their comments that contributed to improve the quality of this paper. Ethical clearance for the use of the extant human cranium was obtained from the Main Research Ethics committee of the Faculty of Health Sciences, University of Pretoria in February 2016.

Funding Information:
We thank the Fossil Access Advisory Panel and the Evolutionary Studies Institute (University of the Witwatersrand) for access to Border Cave 1, and Gideon Chinamatira for X-ray microtomographic acquisitions. We sincerely thank the Digital Archive of Fossil Hominoids team ( https://www.virtual-anthropology.com/ ) and the Rising Star team (MorphoSource project ‘Rising Star’ ID 00000C124) for sharing data. We are grateful to the following institutions for their financial support: Bordeaux University , Centre for Early Sapiens Behaviour , DSI-NRF Centre of Excellence in Palaeosciences (Genus) ( CEOOP 2020-1 ), National Geographic Society ( NGS-54810R-19 ), Grand Programme de Recherche ‘Human Past’ of the University of Bordeaux Initiative d’Excellence, National Research Foundation of South Africa ( #129336 ), University of Bordeaux Programme Talents (Grant No. 191022–001 ), Research Council of Norway through its Centre's of Excellence funding scheme, SapienCE (Project No. 262618 ), and National Science Foundation ( #2131940 -EduceLab: Infrastructure for Next-Generation Heritage Science). We thank the Editors, Antoine Balzeau and one anonymous reviewer for their comments that contributed to improve the quality of this paper. Ethical clearance for the use of the extant human cranium was obtained from the Main Research Ethics committee of the Faculty of Health Sciences, University of Pretoria in February 2016.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Bony labyrinth
  • Cranial vault thickness
  • Hominin brain
  • Middle Stone Age
  • South African fossil record

ASJC Scopus subject areas

  • Global and Planetary Change
  • Ecology, Evolution, Behavior and Systematics
  • Archaeology
  • Archaeology
  • Geology

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