Datos morfológicos y moleculares de <i>Leucochloridium (Papilloleucochloridium) pulchrum</i> (Trematoda: Leucochloridiidae), registrado por primera vez en la Argentina
Bibliographic record
Abstract
The members of the genus Leucochloridium (Trematoda, Leucochloridiidae) are cosmopolitan parasites from both the cloaca and bursa of Fabricius of birds, mainly Passeriformes. In South America three species of this genus have been reported: Leucochloridium (Neoleucochloridium) flavum Travassos, 1922 from Brazil and Venezuela, L. (Leucochloridium) parcum Travassos, 1922 and L. (Papilloleucochloridium) pulchrum Fernandes, 1970 from Brazil. No molecular data from leucochloridiids in the Southern hemisphere have been published so far. The aim of this work is to increase the knowledge of the helminth diversity of Jacana jacana in Argentina with a combined morphological and molecular approach. Two specimens of J. jacana were captured in Formosa province, Argentina, and nine digeneans were recovered from the cloaca of one of them. DNA was extracted and the barcode region of cytochrome c oxidase 1 (CO1) was sequenced for two specimens. Digeneans were identified as L. (P.) pulchrum through morphological study. These specimens differed from the original description of L. (P.) pulchrum by the smaller size of testes and the presence of minute spines in the anterior region of the tegument. The most similar CO1 sequences on GenBank are those of Urogonimus macrostomus (Leucochloridiidae) from Passer domesticus in western Canada which differed by a 21% from L. (P.) pulchrum. Our study expands the geographic range of Neotropical Leucochloridium species with both morphological and molecular data that will be useful for future works on regional diversity and life cycles. This finding constitutes the second report of this species since its original description, and the first record of the genus Leucochloridium for Argentina.
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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 | 0.000 |
| 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".