Laryngotracheal and cervical muscular anatomy in the genus <i>Uroplatus</i> (Gekkota: Gekkonidae) in relation to distress call emission
Bibliographic record
Abstract
The gekkonid Uroplatus exhibits many autapomorphic features. The laryngotracheal region has long been noted to display unusual characteristics, with a widely expanded and membrane-roofed anterior portion of the trachea being prominent among these. It has been proposed that this tracheal expansion serves as a reservoir for pressurised air that is explosively released and provides the energy for the loud distress calls released by these lizards. To determine whether this hypothesis is supported by associated anatomical features, we examined the laryngotracheal region in more detail, for 6 of 14 of the species within the genus, and compared the results to what is known of the laryngotracheal anatomy of Afro-Malagasy geckos. The muscles of the gular region, and the form and dimensions of the trachea, larynx and their adnexa, are described. Modifications of the gular muscles and their attachments render the larynx of Uroplatus more mobile in the oropharyngeal region, and in large-bodied taxa (U. lineatus, U. sikorae) the trachea exhibits the degree of expansion previously observed for U. fimbriatus. In these taxa the paired gular muscles fail to meet in the ventral midline and are, instead, bridged by fascial sheets. These modifications are consistent with ventral displacement of the anterior terminus of the trachea when charged with pressurised air, prior to the opening of the glottal valve and the release of a loud, harmonically-unstructured and explosive distress call. Such calls are likely directed at avian and mammalian predators to induce a startle response. The range of anatomical form of the laryngotracheal region exhibited within Uroplatus provides insights into the variation of laryngotracheal structure, such as incomplete tracheal rings and a conical trachea, which are exhibited by other Afro-Malagasy geckos.
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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 | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 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".