New information on<i>Shanshanosaurus huoyanshanensis</i>, a juvenile tyrannosaurid (Theropoda, Dinosauria) from the Late Cretaceous of China
Bibliographic record
Abstract
Shanshanosaurus huoyanshanensis from the Subashi Formation (Upper Cretaceous) of Xinjiang in northwestern China has long been thought of as a distinctive genus of small theropod. Although usually assigned to its own family, it has generally been included in the tyrannosaurid subfamily Aublysodontinae in recent years. Restudy and description of the only known specimen reveal that it is not a small species, but is a juvenile tyrannosaurine, possibly Tarbosaurus. With a total estimated length of 2.3 m, it is the smallest tyrannosaurid skeleton known. Shanshanosaurus provides the best information available on ontogenetic changes in these enormous carnivores and reveals that young tyrannosaurids had long, low skulls, huge pubic boots, and well-developed limb joints. Evidence suggesting that young tyrannosaurs had relatively longer forelimbs than the adults is not supported by Shanshanosaurus.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.003 |
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 source (direct Gemma or distilled Codex), 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".