North American Opuntias (Cactaceae) in Argentina? Remarks on the phylogenetic position of Opuntia penicilligera and a closer look at O. ventanensis
Why this work is in the frame
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Bibliographic record
Abstract
Opuntia, the most widespread genus of cacti, occurs throughout the Americas from Patagonia to Canada. Various species have very wide distributions in the Americas, and thus may be considered as both native and aliens. We reexamined data based on recent work on the phylogenetics and taxonomy of Opuntia from southern S-America and showed that two presumed endemic species to Argentina—O. penicilligera and O. ventanensis—are likely derived from, or may be conspecific, with North American species. In particular, O. penicilligera is most closely related to members of the O. macrorhiza species complex and is morphologically similar to both O. macrorhiza and O. cymochila. O. ventanensis shares nearly all vegetative and reproductive morphological characters with O. fragilis and likely is conspecific with that taxon. Owed to the wide distribution of Opuntia species and the movement of many taxa by people, extra care must be exercised when describing new species or for carrying out taxonomic treatments. A phylogenetic perspective, as well as a careful study of species across the distribution of the genus, is recommended.
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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