Naslov
Dental cementum virtual histology of Neanderthal teeth from Krapina (Croatia, 130–120 kyr): an informed estimate of age, sex and adult stressors

Autori
Cerrito, Paola ; Nava, Alessia ; Radovčić, Davorka ; Borić, Dušan ; Cerrito, Leonardo ; Basdeo, Tricia ; Ruggiero, Guido ; Frayer, David W. ; Kao, Alexander P. ; Bondioli, Luca ; Mancini, Lucia ; Bromage, Timothy G.

Izvornik
Journal of the Royal Society Interface (1742-5689) 19 (2022); 1-12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
dental cementum ; life-history evolution ; fossil hominins ; Neanderthals ; virtual histology ; synchrotron X-ray microtomography

Sažetak
The evolution of modern human reproductive scheduling is an aspect of our life history that remains vastly uncomprehended. The present work aims to address this gap by validating a non-destructive cutting-edge methodology to infer adult life-history events on modern teeth with known life history and then applying it to fossil specimens. We use phase- contrast synchrotron X-ray microtomography to visualize the dental cementum of 21 specimens: nine contemporary humans ; 10 Neanderthals from Krapina (Croatia, 130–120 kyr) ; one Neolithic Homo sapiens from Ajmana (Serbia) ; and one Mesolithic H. sapiens from Vlasac (Serbia). We were able to correctly detect and time (root mean square error = 2.1 years ; R2= 0.98) all reproductive (menarche, parturition, menopause) and other physiologically impactful events in the modern sample. Nonetheless, we could not distinguish between the causes of the events detected. For the fossil specimens, we estimated age at death and age at occurrence of biologically significant events. Finally, we performed an exploratory analysis regarding possible sexual dimorphism in dental cementum microstructure, which allowed us to correctly infer the sex of the Neolithic specimen, for which the true value was known via DNA analysis.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Etnologija i antropologija

POVEZANOST RADA