<i>Phialocephala sphaeroides</i> sp. nov., a new species among the dark septate endophytes from a boreal wetland in Canada
Bibliographic record
Abstract
Dark septate root endophytic fungi from plants growing on either side of an abrupt wetlandupland ecotone included isolates of Phialocephala fortinii Wang & Wilcox, Leptodontidium orchidicola Sigler & Currah, Hetero conium chaetospira (Grove) Ellis, and a hitherto undescribed fungus resembling P. fortinii. Six isolates of this species were recovered and were distinctive in (i) producing an orangetan diffusible pigment in culture, (ii) causing a yellow colour shift on casamino acids medium containing bromocresol purple, (iii) having the ability to liquefy gelatin, and microscopically, (iv) forming hyaline conidia from phialides arranged in large spherical heads after prolonged incubation at 5 °C. First-formed or primary conidia are bullet shaped, 11.5 µm × 23 µm; subsequent conidia are spherical and 11.5 µm in diameter. Small subunit and internal transcribed spacer region sequence comparisons with P. fortinii and other Phialocephala species supported placing these six unique strains in a new species, Phialocephala sphaeroides B.J. Wilson sp. nov. Phylogenetic analyses also suggest that P. sphaeroides is affiliated with mollisioid taxa in the Dermateaceae. In contrast with P. fortinii, which was isolated on both sides of the ecotone, P. sphaeroides was obtained only from plants in the highly acidic, Sphagnum-dominated wetland habitat and not from the same species in the less acidic, aspen-dominated upland site.Key words: inoperculate discomycetes, phialidic anamorph, Helotiales, root endophytes, Loramycetaceae, Dermateaceae, Mollisia.
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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 | 0.002 | 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) | 0.001 | 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".