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Updated: Mar 23, 2026
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
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Intra-population dental morphological variability among the Prehispanic Maya
1Facultad de Ciencias Antropológicas, Universidad Autónoma de Yucatán, Km 1 Carretera Mérida-Tizimin, 97305 Mérida, Yucatán, Mexico.
Summary
This study introduces a novel method to assess dental trait variability in ancient populations, revealing insights into population dynamics and gene flow. Higher variability correlates with major centers and trade routes, while lower variability indicates isolated communities.
Area of Science:
- Paleogenetics
- Bioarchaeology
- Population Genetics
Background:
- Assessing intra-site variability in dental morphological traits is crucial for understanding population dynamics and gene flow in past societies.
- Traditional methods often struggle with dichotomized traits (presence/absence).
- This research introduces a new approach based on Mendelian trait heterozygote frequency calculations.
Observation:
- The study analyzed 11 Prehispanic Maya skeletal collections from the Yucatán Peninsula using 50 and 40 dental traits.
- A novel method simulating heterozygote frequency (2xᵢyᵢ) was applied to estimate intra-site variability.
- Variability was correlated with the socio-political and economic influence of the sites.
Findings:
- Dental collections from major Maya city centers and aggregated regional sites exhibited the highest intra-site variability.
- Sites significant in trade or other socio-political contexts showed intermediate variability.
- Isolated, smaller communities or kin-related groups displayed the lowest intra-site variability.
Implications:
- The findings suggest that dental trait variability can serve as a proxy for population dynamics, social complexity, and connectivity in ancient Maya societies.
- This new method offers a valuable tool for bioarchaeological research, enhancing our understanding of past human interactions.
- The results highlight the interconnectedness of Maya settlements and the influence of central hubs on regional population structures.
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