A new <i>Diaforobiotus</i> species (Tardigrada: eutardigrada: richtersiusidae) from the Mexican transition zone, described based on multiple lines of evidence
Bibliographic record
Abstract
The genus Diaforobiotus was established to accommodate species formerly assigned to the genus Macrobiotus (family Macrobiotidae), and is now placed within the family Richtersiusidae. Currently, the genus includes five species, one of which—Diaforobiotus islandicus—has been recorded in Mexico. Although most of the country lacks studies focused on tardigrades, the Trans-Mexican Volcanic Belt (TMVB) is interesting since it is positioned between two major biogeographic regions (the Neotropical and the Nearctic) and it serves both as a transition zone and as a hotspot of endemism. In this work, a new tardigrade species, Diaforobiotus quetzalcoatli sp. nov., found in Mount Tlaloc (a locality belonging to the TMVB, in central Mexico) is described. This new species is supported and described with an integrative approach using light, confocal, and scanning electron microscopy, as well as DNA sequences of four molecular markers (COI, ITS-2, 18S rRNA, and 28S rRNA). Phylogenetic analyses revealed that D. quetzalcoatli sp. nov. is closely related to Diaforobiotus occidentalis from Canada, and species delimitation analyses based on COI and ITS2 markers provide strong evidence that Mexican specimens represent a sixth distinct species within Diaforobiotus.
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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 | 0.001 |
| 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".