Record of the slender mola, genus Ranzania (Teleostei, Tetraodontiformes), in the Miocene of the Chelif Basin, Algeria
Bibliographic record
Abstract
A fossil slender mola (Tetraodontiformes, Molidae) is described from the Miocene (Messinian) of the Chelif Basin, Algeria. The material consists of a single individual largely incomplete, solely represented by part of the anal-fin pterygiophores complement. The specimen is referred to the genus Ranzania because of the elongate slender morphology and thick and well-ossified consistence of the bones, which are also characterized by a dense and moderately spongy texture. However, it has been left unnamed, awaiting more complete and better-preserved material. This is the first occurrence of the genus Ranzania, and more generally of the family Molidae, in the Messinian of the Mediterranean. It provides new data about the structure and diversity of Miocene pelagic fish communities of the Chelif Basin. Un fossile de Ranzania (Tétraodontiformes, Molidae), provenant des sédiments du Miocène (Messinien) du bassin de Chélif (Algérie), est décrit. Le seul spécimen connu est en grande partie incomplet et caractérisé par une portion des ptérygiophores de la nageoire anale. Ce fossile appartient au genre Ranzania, en raison de la morphologie générale très élancée et de l’ossification avancée du squelette. Les os sont également caractérisés par une texture dense et modérément spongieuse. Une détermination au niveau de l’espèce n’est pas possible, car le matériel connu n’est pas suffisamment complet. Ce spécimen atteste la première apparition du genre Ranzania, et plus généralement de la famille des Molidae, dans le Messinien de la Méditerranée. Cette découverte fournit de nouvelles données au sujet de la structure et de la diversité des communautés pélagiques miocènes de poissons du bassin de Chélif.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".