Reappraisal of the Permian dissorophid <i>Fayella chickashaensis</i>
Bibliographic record
Abstract
The Permian temnospondyl Fayella chickashaensis from Oklahoma, a purported member of the intriguing clade of terrestrially adapted dissorophids, has been difficult to contextualize within the clade because of uncertainties related to the holotype, an isolated and badly weathered neurocranium. However, postcranial material that has been attributed to this taxon is particularly important for furthering our broader understanding of the patterns of temnospondyl evolution as it relates to their terrestrial diversification at the same time as the diversification of amniotes. Here we present a reevaluation of all material assigned to Fayella. Our examination of the holotype indicates that it is not referable below Temnospondyli indet., and Fayella chickashaensis is hence designated as a nomen dubium. Significant postcranial and the partial cranial material from a different locality than the holotype was referred to the taxon and is sufficiently diagnostic to be associated with the olsoniforms, the clade of large-bodied terrestrial dissorophoids. The presence of osteoderms and the absence of a subdivided naris exclude trematopids. This specimen can be differentiated from other dissorophid taxa by the proportions of the limbs and the elongation of the intercentra and is herein designated as the holotype of Nooxobeia gracilis gen. et sp. nov. The gracile limb proportions of Nooxobeia are particularly exaggerated relative to other olsoniforms and indicate an unusually active, agile predator that is interpreted here as an advanced stage of terrestrial adaptation among dissorophid temnospondyls.
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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 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".