Ultrastructural observations on rodlet-cell development in the head kidney of the southern platyfish, <i>Xiphophorus maculatus</i> (Teleostei: Poeciliidae)
Bibliographic record
Abstract
The enigmatic rodlet cell has been observed in tissues of marine and freshwater teleosts. The origin and function of this cell remain unclear. We describe the association of the rodlet cell with the head-kidney tissue of the southern platyfish, Xiphophorus maculatus. We have observed rodlet cells in various tissues of X. maculatus, e.g., the hemopoietic compartments of the head kidney, gill epithelia, and ovarian tissue, and in melanotic tumors. Recently, we found rodlet cells within the mesothelium and musculature. Intrigued by these observations, we began our current study of the rodlet cell head kidney association in X. maculatus. We discerned a series of developmental stages of the rodlet cell within the hemopoietic tissue of the head kidney, including early precursor cells through degraded terminal stages. Tight junctions and desmosomes were observed between mature rodlet cells and endothelial cells. Desmosomal junctions were occasionally seen between maturing rodlet cells and neighboring cells within intertubular areas. We never observed junctional complexes between adjacent rodlet cells at any stage. Rodlet sacs were released intact and were seen to interact with other cellular components. We relate our findings to those of others who have described the development and distribution of rodlet cells in teleosts.
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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".