The Phylogenetic Position of the Rodent Genus<i>Typhlomys</i>and the Geographic Origin of Muroidea
Bibliographic record
Abstract
In this report, we provide the 1st phylogenetic assessment of the evolutionary relationships of Platacanthomyidae. This enigmatic family of rodents comprises 2 genera, Platacanthomys and Typhlomys, that are distributed disjunctly in western India and southern Asia, respectively. We analyze sequence data from the nuclear genes encoding the interphotoreceptor retinoid-binding protein (IRBP) and the growth-hormone receptor (GHR) to address the relationships of Typhlomys cinereus to other rodents, with a particular focus on testing whether its evolutionary affinities lie with glirids or muroids. Our results provide compelling evidence that Typhlomys is a muroid and that it represents the earliest split within this clade. We use the resulting phylogeny to explore the origin and evolutionary history of muroid rodents. We conclude that both Myodonta and Muroidea originated in Eurasia and that the 3 earliest divergences within Muroidea were restricted to the Eurasian supercontinent. Moreover, our analyses support the view that global muroid diversity resulted from independent radiations in separate continental regions.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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".