The anatomy of<i>Askeptosaurus italicus</i>from the Middle Triassic of Monte San Giorgio and the interrelationships of thalattosaurs (Reptilia, Diapsida)
Bibliographic record
Abstract
The anatomy of the thalattosauriform reptile Askeptosaurus italicus from the Middle Triassic of Monte San Giorgio is redescribed. Important anatomical features are the plesiomorphic braincase, the unique fronto-lacrimal contact, the absence of a previously described thyroid fenestra, and significant intraspecific variation in the carpus. An analysis of thalattosaur ingroup relationships reveals that Endennasaurus and the monophyletic Askeptosaurus and Anshunsaurus are the sister group to all other thalattosaurs, whereas the Monte San Giorgio taxa Clarazia and Hescheleria form the sister clade of Thalattosaurus, and the Chinese Xinpusaurus and the Californian Nectosaurus form a monophyletic group. The analysis supports the biogeographic interpretation of trans-Pacific relationships and a re-invasion of Tethyan areas.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".