Egg hull formation in <i>Callochiton dentatus</i> (Mollusca, Polyplacophora): the contribution of microapocrine secretion
Bibliographic record
Abstract
Abstract. Egg hull formation during oogenesis in the chiton Callochiton dentatus does not follow the typical model of merocrine secretion involving Golgi vesicle exocytosis. Instead, microapocrine secretions are primarily responsible for egg hull formation, although merocrine secretions contribute “areolae” and the vitelline layer. Microapocrine secretion mechanisms are poorly understood, involving a different cellular pathway than is typical. Egg hull formation in C. dentatus involves two types of microapocrine secretions released by the oocyte, one of which is described here for the first time. The plesiomorphic jelly‐like egg hull of chitons, as exemplified by the eggs of members of the basal order Lepidopleurida and present also in eggs of C. dentatus (Chitonida: Callichitonidae), may have evolved solely as an oocyte secretion, whereas members of some other families in the order Chitonida form their egg hulls with considerable secretory input from the follicle cells as well.
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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 | 0.000 | 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) | 0.001 | 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".