Champsosaurus lindoei Gao & Fox 1998
Bibliographic record
Abstract
Champsosaurus lindoei Gao & Fox, 1998 Holotype: UALVP 931, a nearly complete skeleton with skull and mandibles, vertebral series lacking the tail, limb girdles, and limbs. Type locality and horizon: An outcrop in Dinosaur Provincial Park, in Section 17, Township 20, Range 12, W4, Alberta, Canada, from what is now recognized as the Dinosaur Park Formation (Middle Campanian; ~76.5 to 74.5 Ma; Ramezani et al. 2022). Diagnosis: A relatively small and gracile Champsosaurus with: (1) snout significantly more slender in proportion to the skull size with a more expanded narial bulla; (2) pterygoid flange weakly developed with reduced number of teeth; (3) inferior temporal arch nearly straight and not swollen laterally; (4) inferior temporal fenestra rectangular (Gao and Fox 1998). Locality and horizon of ROM 50000: ROM 50000 was recovered from the locality north of Dupuyer, in either Section 29 or 30, Township 29N, Range 7W, Pondera County, Montana, by private collectors. This locality is in Cession 574, just south of the Blackfeet Nation (Cession 695). It was found in situ in a fine, grey/beige sandstone from the mid-upper TMF (Middle to Upper Campanian; ~82.5 to 74.6 Ma; Ramezani et al. 2022). Comments: ROM 50000 is referred to C. lindoei based on its relatively small size (maximum skull length = 258 mm), slender snout, straight inferior temporal arch, and rectangular inferior temporal fenestra (Gao and Fox 1998). The morphology of the pterygoid flange, number of pterygoid teeth, and proportions of the narial bulla cannot be commented on because the ventral surface of the skull is not exposed, and the narial bulla has fractured away post-mortem.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.010 | 0.002 |
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".