Paraconiothyrium archidendri Verkley, Goker and Stielow
Bibliographic record
Abstract
Paraconiothyrium archidendri Verkley, Göker and Stielow, Persoonia 32: 37 (2014) Fig. 10 Description. Saprobic on a dead stem of Citrus maxima (Rutaceae). Sexual morph: Undetermined. Asexual morph: Coelomycetous. Conidiomata 100–150 × 100–170 µm (x ̄ = 105 × 135 µm, n = 10), pycnidial, immersed to semi-immersed, dark brown to black, solitary to aggregated, globose to sub-globose. Conidiomatal wall 15–30 μm wide (x ̄ = 17 µm), thick-walled, composed of several layers of brown to dark brown pseudoparenchymatous cells, cells towards the inside hyaline, arranged in a textura angularis, fusing at the outside indistinguishable from the host tissues. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 6–8 × 3–4 µm (x ̄ = 6.4 × 3.2 µm, n = 20), discrete, hyaline, globose to doliiform, holoblastic. Conidia 5.8–7 × 3–4 (x ̄ = 6.3 × 3.2 µm, n = 40) µm, variable in shape, subglobose to ellipsoid, rarely obovoid, ends rounded, aseptate, initially hyaline, becoming olivaceous-brown at maturity, contents with several small oil droplets, smooth-walled. Known hosts. Acer pentaphyllum, Alliaria petiolate, Cinnamomum camphora, Citrus maxima, Coffea arabica, Ginkgo biloba, Magnolia sp., Picea glauca, Pinus tabulaeformis, Pithecolobium bigeminum and Prunus salicina (Verkley et al. 2004, 2014; Damm et al. 2008; Paul and Lee 2014; Nakashima et al. 2019; Tennakoon et al. 2022; this study). Known distribution. Brazil, Canada, China, Japan, Korea, Myanmar, South Africa, and the United States (Verkley et al. 2004, 2014; Damm et al. 2008; Paul and Lee 2014; Nakashima et al. 2019; Tennakoon et al. 2022; this study). Material examined. China • Guangdong Province, Shenzhen, on dead stem of Citrus maxima (Rutaceae), 21 December 2024, D. S. Tennakoon, DC 030 (SZU 25-018, new host record); living culture MBSZU 25-027. Notes. Paraconiothyrium archidendri was initially introduced by Verkley et al. (2014) from Pithecellobium bigeminum in Myanmar. A multi-gene phylogeny indicates that our collection (SZU 25-018) groups with other P. archidendri isolates, particularly closely related to the isolate CBS 168.77. Our collection shares similar morphological characteristics with P. archidendri by having pycnidial, immersed to semi-immersed, dark brown to black conidiomata, globose to doliiform conidiogenous cells, and subglobose to ellipsoid, olivaceous-brown, aseptate conidia (Damm et al. 2008; Paul and Lee 2014; Verkley et al. 2014; Nakashima et al. 2019; Tennakoon et al. 2022). Thus, we identify our collection as Paraconiothyrium archidendri with a new host occurrence from Citrus maxima in China.
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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 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.011 | 0.004 |
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".