Phragmotrichum chailletii has a sibling species in North America
Bibliographic record
Abstract
The phylogenetic placement of <em>Phragmotrichum chailletii </em>in Melanommataceae (Pleosporales) is re-evaluated and its phylogeographic structure is assessed based on a large number of specimens from Europe and North America together with a four-gene (ITS, LSU, <em>RPB2</em>, <em>EF1-α</em>) dataset. Morphologically, all collections produced identical conidiomata and conidia on the same substrate, which is spruce cones on litter. Their fruiting season was also similar as they originated from early spring soon after snow melts at a similar range of elevation. However, all isolates collected in Canada and associated with <em>Picea</em> species native to North America, clustered together in a clade separate from collections made in Europe and occurring on host species native to central-eastern Europe. A sibling species, <em>Ph. thornhilliae</em>, is introduced to accommodate this group of isolates using molecular and phylogeographic evidence. One specimen belonging to the novel species was also collected in Switzerland. Possible scenarios to explain this anomaly are provided and the most likely explanation is an accidental, human mediated introduction.
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How this classification was reachedexpand
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 | 0.002 |
| 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) | 0.008 | 0.006 |
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; both teacher heads agree on what is shown here.
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".