First occurrence of <i>Daspletosaurus horneri</i> (Tyrannosauridae, Tyrannosaurinae) in the Dinosaur Park Formation of Dinosaur Provincial Park, Alberta (Treaty 7 Territory)
Why this work is in the frame
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Bibliographic record
Abstract
The upper Campanian tyrannosaurine Daspletosaurus horneri was originally described based solely on specimens from the Two Medicine Formation of Montana, U.S.A.. Here, a taxonomic reassessment of a stratigraphically high occurrence of a Daspletosaurus specimen, CMN 350, from the Dinosaur Park Formation provides the first evidence of D. horneri within Alberta, Canada. CMN 350 was originally referred to the species D. torosus, but re-examination of the cranial morphology of this specimen revealed characteristics more similar to those of D. horneri. These characteristics include an inflated lacrimal horn that does not extend to the medial margin of the bone, a medial pneumatic recess opening of the lacrimal that is dorsoventrally tall and mediolaterally narrow, and a distinct lateral bow of the dentary. The referral of CMN 350 to D. horneri offers valuable insight into intraspecifically variable characteristics of the skull and aided in the amended species diagnosis. Furthermore, the recognition of D. horneri within the uppermost biozone of the Dinosaur Park Formation, 49 m above the underlying Oldman Formation contact, supports system-wide faunal turnover within the formation and extends the known latitudinal range of this taxon to approximately 350 km.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it