Details of a new skull and articulated cervical column of<i>Dinilysia patagonica</i>Woodward, 1901
Bibliographic record
Abstract
ABSTRACT Aspects of the cranial and postcranial anatomy are presented for a new specimen of the Upper Cretaceous Gondwanan snake, Dinilysia patagonica Woodward, 1901, collected near Paso Cordoba, Rio Negro Province, Argentina, during the field season of 2001. The specimen preserves important features of the dentary and postdentary bones (in particular the coronoid and compound bone), the quadrate, and the ventral surface of the basicranium, as well as the axis, atlas, and anteriormost cervical vertebrae. The third and fourth cervicals are preserved with unfused and articulating intercentra on large, ovate, concave hypapophyses (typical of dolichosaurs, mosasaurs, adriosaurs, etc.), while the inter-centrum of the fifth appears to be fused to a long, narrow hypapophysis (this latter condition is typical of modern snakes). These new data influence the construction of primary homology statements used in cladistic analyses of squamate phylogeny generally and ophidian phylogeny specifically. Comparison of the cranial anatomy of Dinilysia to that available for the recently described Argentine Gondwanan snake, Najash rionegrina Apesteguía and Zaher, 2006, indicates important similarities in the two species to the exclusion of scolecophidian snakes.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.001 | 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".