Variation in Molar Size and Proportions in the Hominid Lineage: An Inter- and Intraspecific Approach.

ABSTRACT: The implications of the inhibitory cascade (IC) model in dental diversification have been primarily studied at an interspecific or higher level. In contrast, the study of organisms with recent evolutionary divergence or at an interpopulational scale is still very limited. Here, we assess the effect of changes in molar size and the ratio of local activators to inhibitors on molar proportions based on a compilation of data of crown diameters of the first, second, and third lower and upper molars of extinct and extant hominids and modern human populations. The analysis of allometric changes between the size of each tooth and the size of the molar row shows a negative allometry in first molars (M1), isometric changes in second molars (M2), and a positive allometry in third molars (M3) in both

SUBMITTER: D'Addona LA 

PROVIDER: S-EPMC11631436 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature