Comatricha macrospora B. Zhang & Yu Li 2018, sp. nov.
Bibliographic record
Abstract
Comatricha macrospora B. Zhang & Yu Li, sp. nov. Figure 2. MycoBank number: MB 824130. Cylindrical dark brown sporocarps are present in tufts, with a total height of 5–7 mm. The stalks are short or absent and often appear to be polished black. The sporothecae are oval, rounded at the apex and dark brown. A persistent peridium at the base of the sporotheca has a single layer that is partly evanescent; the peridium is dark black, with a dehiscence that is apical and irregular. The columella usually arrives at the apex of the sporotheca, fused with the capillitium. The internal net of the capillitium consists of thick threads with several, usually large, expansions at the junctions; mostly exceeding 50 μm, typically in the form of thin threads without free ends. A mass of dark brown spores, 11–14 μm in diameter, are densely, evenly and minutely warted. Diagnosis:— Smaller sporocarps, persistent peridium at the base of the sporocarps and larger spores than other species in this genus. Typification:— CHINA. Jinlin Province, Baishan City, Changbai Mountain National Nature Reserve, on a rotting log in a mixed forest, 18 October 2017, Zhang 25382 (Holotype, HMJAU-M1066!). GenBank: SUB3594089. Etymology:— macrospora (Lat.): referring to the larger spores. Other specimen examined. — CHINA. Jilin Province, Chibei County, on a rotting log in a mixed forest, 22 August 2015, Zhang 13462 (Paratype, HMJAU-M2066!) Discussion: About 42 species of Comatricha have been reported worldwide (Kirk et al. 2008, Lado 2001, 2005– 18), of which nine species have reticulate spores and 33 species have spiny or verruculose spores. Of the accepted species, only C. pseudoalpina G. Moreno, H. Singer, A. Sánchez & Illana and C. filamentosa Meyl. are similar to C. macrospora in having a persistent peridium and sporothecae that are subcylindric and somewhat expanded in their upper portions. However, C. pseudoalpina has smaller spores (10–12 μm in diameter), larger sporothecae (1.5–2.5 mm) and warted capillitium threads. Comatricha filamentosa has an expanding capillitium that becomes entangled with the adjacent capillitia and minutely spinulose spores (10–13 μm in diameter).
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".