PHYLOGENETICS OF MODEL ORGANISMS:
Bibliographic record
Abstract
Abstract.—The axolotl, Atribystoma mexicanum, has been an important model system in both developmental and evolutionary biology for over 100 years. The axolotl is a recently derived member of the Ambystoma tigrinum complex (Ambystomatidae), a rapidly evolving clade of 17 closely related species ranging from southern Canada to central Mexico. The relationships of the A. tigrinum complex to the remaining species of ambystomatids are controversial; morpho-logical data are ambiguous, although allozyme data suggest a sister-group relationship with A. macrodactylum-A. jeffersonianum with moderate statistical support. At the familial level, ribosomal RNA sequence data strongly suggest that Dicamptodon is the sister group to the Ambystomatidae, followed by the newts (Salamandridae). Two primary foci of laboratory research on the axolotl are the developmental mechanisms of pigment pattern and the physiological control of meta-morphosis. Both pigment pattern and metamorphosis are extremely variable within the A. ti-grinum complex and are important systematic characters at the inter- and intraspecific levels. Current comparative studies on postmetamorphic color pattern and metamorphosis across the A. tigrinum complex will be particularly important in elucidating the developmental bases of rapid divergence and speciation, and our existing phylogenetic information provides a historical
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 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".