Description and phylogenetic interpretation of chromatophore migration from larval air sacs to adult structures in some Chaoboridae (Diptera)
Bibliographic record
Abstract
Abstract During development, many chromatophores on the air sacs of larvae of Chaoborus Lichtenstein disperse to the tracheal trunks and throughout the body of the pupae. In male pupae, chromatophores on the posterior air sacs move to the developing testes and vasa deferentia and some become the adventitious spotting previously reported for adults of Chaoborus. In larvae of Mochlonyx Loew, chromatophores have a similar development pattern, but in female pupae some also surround the spermathecae. Larvae of Eucorethra Underwood have chromatophores scattered throughout much of the body but it is uncertain whether these are homologous to those of Chaoborus and Mochlonyx. Outgroup comparisons show that the migration of chromatophores from the larval air sacs to the adult male testes and vasa deferentia is a synapomorphy of Chaoborinae. The presence of pigmented fat body on the larval testes in many Culicidae, Eucorethra, and Mochlonyx is plesiomorphic, and the transparent larval testes in Chaoborus are a synapomorphy of the genus. The dark adult testes in Mochlonyx are derived from pigmented larval fat body and chromatophores from the larval air sacs, and this is proposed as an intermediate evolutionary state. It is likely that the chromatophores surrounding the testes of pupae of Chaoborinae provide protection against ultraviolet radiation, but further study is needed.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".