Clostridium tagluense sp. nov., a psychrotolerant, anaerobic, spore-forming bacterium from permafrost
Bibliographic record
Abstract
A strictly anaerobic, Gram-positive, psychrotolerant, endospore-forming bacterium (strain A121(T)) was isolated from a permafrost sample collected in the Canadian High Arctic. Phylogenetic analysis of the 16S rRNA gene sequence of strain A121(T) showed its affiliation with the group of psychrophilic and psychrotolerant members of cluster I of the genus Clostridium, Clostridium bowmanii DSM 14206(T) being the closest relative (sequence similarity 98.5 %). Levels of DNA-DNA relatedness between strain A121(T) and the type strains of phylogenetically related species ranged from 33 to 52 %. Strain A121(T) grew in PY broth at temperatures between 4 and 28 degrees C (optimum 15-20 degrees C), at pH 6.0-8.0 (optimum pH 6.5-7.2) and in NaCl concentrations of 0-10.0 % (optimum 0-2.0 %). The strain utilized a narrow range of carbohydrates as sources of carbon and energy, including glucose, fructose, trehalose, maltose and starch; it also hydrolysed gelatin. Predominant fatty acids were C(16 : 1) cis9, C(16 : 1) cis9 DMA, C(16 : 0) and C(14 : 0). The DNA G+C content was 31.5 mol%. On the basis of its overall genotypic and phenotypic characteristics, strain A121(T) is classified within a novel species of the genus Clostridium, Clostridium tagluense sp. nov. The type strain is A121(T) (=VKM B-2369(T) =DSM 17763(T)).
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".