Stellantini Armbruster & Lujan 2024, new tribe
Bibliographic record
Abstract
Tribe Stellantini Armbruster & Lujan, new tribeurn:lsid:zoobank.org:act: 1D1E1710-3653-4CFA-A6BB-1975401D6ADF (Fig. 1; Tabs. 1 and S3) Type-genus. Stellantia, new genus Included genera. Colossimystax, new genus Stellantia, new genus Phylogenetic diagnosis. Hyomandibula contacting prootic (0>1), posteromedial invagination of ceratobranchial 5 (11: 0>1), straight, spoon-shaped anterior process on metapterygoid (58: 0>1, shared with Pseudancistrini), forward extent of anterior process of compound pterotic long, halfway through orbit or greater (112: 0>1), and straight anterolateral processes of pelvic basipterygium (167: 1>2). In addition, Stellantini uniquely possesses plates along ventral series on the caudal peduncle that are strongly bent to form a keel with the keel accentuated by having the dorsal lamina of the plates strongly concave. Comparative diagnosis. Morphometric data reported in Tab. 1. The two species of Stellantini are dramatically different from one another, but the tribe can be identified from other Hypostominae by having a strong keel on the ventral plate series on the caudal peduncle made by the ventral lamina of each plate being strongly convex and the dorsal lamina of each plate being strongly concave (vs. maximally having a slight keel made predominantly of odontodes and the dorsal lamina of each ventral plate being flat to very slightly concave). Geographical distribution. Both species of Stellantini are found in main channels of the upper Orinoco and Negro river basins, including the Casiquiare River, in Venezuela, Colombia, and possibly also northernmost Brazil, though no Brazilian specimens have been observed or reported (Fig. 5).
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.017 | 0.005 |
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".