Phylogeny and taxonomic revision of Thelonectria discophora (Ascomycota, Hypocreales, Nectriaceae) species complex
Bibliographic record
Abstract
Specimens regarded as Thelonectria discophora ( Thelonectria , Nectriaceae , Hypocreales ) constitute a conspicuous group of saprobic fungi on decaying plant material, characterized by red perithecia each with a broad mammiform (nipple-like) apex. The asexual state is characterized by a cylindrocarpon-like morphology, with 3–5 septate macroconidia, unicellular microconidia and chlamydospores that are rarely produced in culture. In the past, T. discophora was regarded as one species with a wide geographic distribution. However, a recent study rejected the monophyly and cosmopolitan distribution of this species , and showed the existence of at least 16 cryptic species distributed in three main groups. By combining the results of phylogenetic analyses of six nuclear loci and morphological studies, we revised the taxonomy of the T. discophora species complex, resulting in the description of 12 new species and four new combinations based on historic names. Even though molecular phylogenetic analyses strongly support the segregation of these species, and are in agreement with previous studies, individual diagnostic morphological characters for each species could not be identified. However, discrete morphological traits corresponding to each of the three main groups of species were discovered. Lineages could be differentiated based on the average values of morphological traits as well as the presence/absence of characteristic asexual propagules and colony growth at 30C. Descriptions, illustrations are provided for the recognized species.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".