Phylogenetic Relationships of the Genus Homatula (Cypriniformes: Nemacheilidae), with Special Reference to the Biogeographic History around the Yunnan-Guizhou Plateau
Bibliographic record
Abstract
Species of the nemacheilid genus Homatula are endemic to the Yunnan-Guizhou Plateau of China. Herein we provide phy-logenetic inferences of species relationships based on complete sequences of the mitochondrial cytochrome b gene (cyt b)and partial sequences of the nuclear recombination activation gene (RAG 1). Both gene trees (and the concatenated dataset) support the recognition of five clades in the genus. These analyses also support the hypothesis that two of the lineagesresolved represent undescribed species awaiting formal description, and, further, that two previously recognized speciesare junior synonyms; both are genetically indistinguishable from other previously recognized species. Divergence timesof the major clades in Homatula are inferred to be Late Pliocene and the Early Pleistocene, and are correlated with themassive geological events associated with the uplift of the Qinghai-Tibetan Plateau occurring at these times. The recon-struction of drainage histories suggests that the fish faunas of the Nu and Lancang rivers are basal relative to other riverinefaunas in the region, and that the Nanpan and the Jinsha rivers share a more recent history than with any other river systems included in our study.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".