The skull of Mesenosaurus romeri, a small varanopseid (Synapsida: Eupelycosauria) from the Upper Permian of the Mezen River basin, northern Russia
Bibliographic record
Abstract
Restudy of Mesenosaurus romeri, based on new and previously described cranial materials from the Upper Permian of the Mezen River basin of northern Russia, confirms its assignment to the synapsid eupelycosaurian family Varanopseidae. Comparisons with other members of the family support a pattern of relationship that recognizes two clades: one is composed of Mesenosaurus and Mycterosaurus for which the subfamily designation Myctersaurinae is proposed, and the other includes the remaining wellknown varanopseids Elliotsmithia, Varanops, Varanodon, and Aerosaurus for which the subfamily designation Varanodontinae is proposed. Among the late Paleozoic synapsids, Varanopseidae has the longest fossil record, extending from the end of the Carboniferous to well into the Late Permian, and the widest geographical distribution, including North America, South Africa, and Russia.
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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 | 0.001 |
| 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 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".