Incisor cross‐sectional area at the cementoenamel junction correlates with an increased reliance on frugivory in anthropoid primates
Bibliographic record
Abstract
Abstract Diet is one of a limited set of key ecological parameters defining primate species. A detailed understanding of dental functional correlates with primate diet is a key component for accurate dietary inference in fossil primates. Although considerable effort has been devoted to understanding post‐canine dental function, incisor function remains poorly understood. Prior analyses have demonstrated that anthropoid incisor mesiodistal (MD) and cervico‐incisal (CI) crown curvature correlates with an increased reliance on frugivory and that greater incisor crown curvature functions to increase total crown area and, by extension, crown resistance to normal bending stresses (e.g., compressive and tensile forces). The present study investigates the correlation between incisor basal cross‐sectional area at the cementoenamel junction (CA cej ) and the degree to which taxa rely on frugivory to better understand how non‐normal forces (e.g., shear) may influence incisor morphology. Results demonstrate that, like resistance to bending stress, resistance to shear stress (as represented by the CA cej ), is positively correlated with an increased reliance on frugivory such that more frugivorous anthropoids have larger CA cej relative to body mass and therefore greater resistance to shear stress. Likewise, hard‐object frugivores have increased shear resistance relative to soft‐object frugivores. A more detailed working understanding of the forces acting on primate incisors, and how these crowns resist those forces, will contribute to improving our understanding of how diet influences incisor morphology and the accuracy of dietary inference in fossil anthropoids.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".