A reappraisal of the Border Cave 1 cranium (KwaZulu-Natal, South Africa)
| Autor: | Beaudet, A, D'Errico, Francesco, Backwell, L, Wadley, L, Zipfel, B, De La Peña, P, Reyes-Centeno, H |
|---|---|
| Přispěvatelé: | Beaudet, Amelie [0000-0002-9363-5966], Apollo - University of Cambridge Repository |
| Rok vydání: | 2022 |
| Předmět: |
Archeology
Global and Planetary Change Middle Stone Age 1.1 Normal biological development and functioning South African fossil record Geology Cranial vault thickness 37 Earth Sciences 3705 Geology Bony labyrinth 4301 Archaeology 1 Underpinning research Hominin brain Ecology Evolution Behavior and Systematics 43 History Heritage and Archaeology |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|