Colletotrichum chinensis Y. Zhang ter & L. Zhang 2024, sp. nov.
Bibliographic record
Abstract
Colletotrichum chinensis Y. Zhang ter & L. Zhang sp. nov. Fig. 6 Holotype. QCG- 1. Etymology. Named after China where the fungus was collected. Description. Associated with walnut fruit and leaf anthracnose. Sexual morph not observed. Asexual morph developed on MEA. Conidiomata acervular, conidiophores hyaline, smooth-walled, septate, branched. Setae medium to dark brown, smooth to finely verruculose close to the tip, the tip rounded, 1–3 aseptate, 39.2–118.7 μm long. Conidiogenous cells subcylindrical, straight to curved, 16.7–30.0 × 2.3–3.7 μm (mean ± SD = 22.2 ± 0.6 × 3.2 ± 0.1 μm, n = 30). Conidia hyaline, smooth-walled, subcylindrical, both ends round, 1–3 - guttulate, contents granular, 13.7–18.5 × 4.4–5.9 μm (mean ± SD = 16.4 ± 1.0 × 5.0 ± 0.3 μm, L / W radio = 3.3, n = 100). Culture characteristics. Colonies on MEA flat with entire margin, surface pale pink, covered with felty white aerial mycelium aerial; reverse rosy buff to honey-coloured, growth rate 75–76 mm diam. in 7 d. Colonies on PDA flat with entire margin, surface pale pink, covered with felty white or grey aerial mycelium, grey aerial mycelium in the centre; reverse buff, rosy buff to honey-coloured, growth rate 79–80 mm diam. in 7 d. Appressoria produced on slide culture from conidia, medium to dark brown, variable in shape, often smooth-walled, subglobose, ovate to broadly elliptical in outline, 7.3–12.0 × 4.7–6.7 μm (mean ± SD = 9.5 ± 0.2 × 5.8 ± 0.1 μm, L / W radio = 1.6, n = 40). Material examined. China, Shandong Province, Taian City, on fruit of Juglans regia L., 29 July 2022, Y. Zhang, L. Zhang and L. L. Zhao (holotype, QCG- 1, culture ex-type, QCG- 1.1 = CGMCC 3.25209; culture QCG- 1.3 = CGMCC 3.25210); Beijing City, on fruit of Juglans regia L., 15 July 2022, Y. Zhang, L. Zhang and L. L. Zhao (JF 715-6, culture, JF 715-6.1 = CGMCC 3.25211; culture, JF 715-6.3 = CGMCC 3.25212). Notes. Phylogenetic analysis of the concatenated set of nucleotides from five loci indicated that Colletotrichum chinensis nested in the clade of C. gloeosporioides species complex and was closely related to C. citrulli, C. dimorphum, C. gloeosporioides, C. juglandicola, C. nanhuaensis and C. peakense (Cannon et al. 2008; Guo et al. 2022; Yu et al. 2022; Zhang et al. 2023). Morphologically, the strikingly longer conidia or appressoria of C. chinensis could be readily distinguishable from C. citrulli, C. dimorphum, C. gloeosporioides, C. juglandicola, C. nanhuaensis or C. peakense. Colletotrichum citrulli, C. dimorphum and C. nanhuaensis were originally reported from Ageratina Adenophora (Spreng.) King & H. Rob. and Citrullus lanatus (Thunb.) Matsum & Nakai, respectively in China (Guo et al. 2022). Colletotrichum juglandicola and C. peakense had been reported from Juglans regia L. as new species in China (Zhang et al. 2023). Thus, Colletotrichum chinensis was identified as a new species in this study, which caused anthracnose of Juglans regia.
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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) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.003 |
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".