Differences in Dental Size Among the Indigenous Population of the Canary Islands
Rebeca García-González
Laboratory of Human Evolution, Department of History, Geography and Comunication, Faculty of Humanities and Comunication, Universidad de Burgos Edificio, Burgos, Spain
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Methodology (equal), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorAarón Morquecho Izquier
G. I. Tarha. Department of Historical Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)
Search for more papers by this authorCorresponding Author
Jonathan Santana
G. I. Tarha. Department of Historical Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
Correspondence:
Jonathan Santana ([email protected])
Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Methodology (equal), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorRebeca García-González
Laboratory of Human Evolution, Department of History, Geography and Comunication, Faculty of Humanities and Comunication, Universidad de Burgos Edificio, Burgos, Spain
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Methodology (equal), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorAarón Morquecho Izquier
G. I. Tarha. Department of Historical Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)
Search for more papers by this authorCorresponding Author
Jonathan Santana
G. I. Tarha. Department of Historical Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
Correspondence:
Jonathan Santana ([email protected])
Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Methodology (equal), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorFunding: This work was supported by the H2020 European Research Council (Grant 851733) and the Ministerio de Ciencia, Innovación y Universidades (Grants CNS2022-136039, PID2021-122355NB-C31, RTI2018-101923-J-I00, and RYC2019-028346).
ABSTRACT
Nonmetric dental traits and odontometrics have demonstrated that pre-European populations of the Canarian archipelago are closely related to Northwest Africans, revealing varying degrees of interisland diversity. However, a comprehensive study of differences across various islands has not yet been conducted. This study aims to analyze the differences in dental size among the island populations of the Canary Islands during the indigenous period. The mesiodistal (MD) and buccolingual (BL) diameters, along with the geometric mean of the permanent teeth (I1-M2), were measured in 347 adult individuals from each of the Canary Islands, excluding Lanzarote. Statistical analyses were performed to identify interisland differences in tooth size and between island populations. Two distinct patterns emerged: the populations of Fuerteventura and Gran Canaria had the largest BL and MD diameters, respectively, whereas the populations of El Hierro and La Palma had the smallest values for most teeth. These differences are statistically significant, especially between Gran Canaria (largest teeth) and El Hierro (smallest BL and MD diameters). Our results indicate heterogeneity in dental size, suggesting genetic differences between the eastern and western islands and limited gene flow among islands after the initial settlement. Furthermore, subsistence practices seem to influence these differences. Overall, the findings provide insights into the interplay of genetic isolation, subsistence strategies, body size variations, and sexual dimorphism.
Conflicts of Interest
The authors declare no conflicts of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are partially available in the article and are available from the corresponding author upon reasonable request.
Supporting Information
Filename | Description |
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OA_3385-sup-0001-SupplementaryMaterial.docxWord 2007 document , 796.3 KB |
Table S1 Sample details for each individual from the indigenous period included in this study. Table S2. Number of teeth analyzed for each of the Canarian Indigenous populations. Table S3. Summary statistics of each variable measured in upper first incisors from each Indigenous population. Table S4. Summary statistics of each variable measured in upper second incisors from each Indigenous population. Table S5. Summary statistics of each variable measured in upper canines from each Indigenous population. Table S6. Summary statistics of each variable measured in upper first premolars from each Indigenous population. Table S7. Summary statistics of each variable measured in upper second premolars from each Indigenous population. Table S8. Summary statistics of each variable measured in upper first molars from each Indigenous population. Table S9. Summary statistics of each variable measured in upper second molars from each Indigenous population. Table S10. Summary statistics of each variable measured in lower first incisors from each Indigenous population. Table S11. Summary statistics of each variable measured in lower second incisors from each Indigenous population. Table S12. Summary statistics of each of variables measured in lower canine from each Indigenous population. Table S13. Summary statistics of each variable measured in lower first premolar from each Indigenous population. Table S14. Summary statistics of each variable measured in lower second premolar from each Indigenous population. Table S15. Summary statistics of each variable measured in lower first molar from each of the Canary Islands. Table S16. Summary statistics of each variable measured in lower second molar from each of the Canary Islands. Table S17. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of first incisors among the Indigenous populations with sample sizes ≥ 10. Table S18. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of second incisors among the Indigenous populations with sample sizes ≥ 10. Table S19. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of canines among the Indigenous populations with sample sizes ≥ 10. Table S20. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of first premolars among the Indigenous populations with sample sizes ≥ 10. Table S21. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of second premolars among the Indigenous populations with sample sizes ≥ 10. Table S22. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of first molars among the Indigenous populations with sample sizes ≥ 10. Table S23. P-values from the Mann–Whitney U test with Bonferroni correction comparing dental variables of second molars among the different Indigenous populations. Table S24. Spearman’s r coefficient of correlation between the dental diameters and the wear degree by tooth. Table S25. P-values from the Mann–Whitney U test with Bonferroni correction comparing the mesiodistal diameters and the geometric mean of upper first premolars across different Indigenous populations, taking dental wear degree into account. Table S26. P-values from the Mann–Whitney U test with Bonferroni correction comparing the mesiodistal diameters and geometric mean of upper first molars across different Indigenous populations, taking dental wear degree into account. Table S27. P-values from the Mann–Whitney U test with Bonferroni correction comparing the mesiodistal diameters of lower second incisor and the buccolingual diameter of lower second molars across different Indigenous populations, taking dental wear degree into account. Figure S1. Line plots of BL and MD diameters (medians) in dentition for each indigenous population. Red: maxillary teeth. Blue: mandibular teeth. Triangles: buccolingual diameters. Squares: Mesio-distal diameters. Figure S2. Number of individuals by wear degree, tooth, and population. The horizontal axis shows the wear degree. Blue: El Hierro, Pink: La Palma, Red: La Gomera, Gray: Tenerife, Yellow: Gran Canaria, Purple: Fuerteventura. |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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