Organization of pharyngeal hard parts and musculature in<i>Gnathostomula armata</i>(Gnathostomulida: Gnathostomulidae)
Why this work is in the frame
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Bibliographic record
Abstract
The pharynx of Gnathostomula armata, like that of other members of the phylum Gnathostomulida, consists of a set of jaws, a basal plate, and a muscular bulb that encloses these cuticularized hard parts. Field-emission scanning electron microscopy (SEM) provides additional information about the hard parts and shows that the dentition of the jaws is arranged in three rows: 710 teeth in a dorsal row, 1620 teeth in a medial row, and 20 teeth in a ventral row, a pattern different from that reported from light microscopy (LM). SEM also shows that the dentition of the basal plate is more like that of other Gnathostomula species than was previously discerned. Confocal laser scanning microscopy shows the musculature of the pharyngeal bulb to comprise diductors that open and tilt the jaws, looplike abductors that retract them as they snap shut by recoil, and a pair of inclinators and pair of levators that also participate in tilting the jaws back and forth. A constrictor running ventral to and behind the jaws may work to protrude them. Two arc-shaped muscles attached to the basal plate pull it forward and tilt it down to scrape food from the substratum so that it can be grabbed by the jaws. Paired retractor muscles pull the basal plate back into the mouth.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.000 | 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 it