Planococcus halocryophilus sp. nov., an extreme sub-zero species from high Arctic permafrost
Bibliographic record
Abstract
A novel aerobic, Gram-positive, motile, coccoid bacterial strain, designated Or1(T), was isolated from permafrost active-layer soil collected from the Canadian high Arctic. Strain Or1(T) was capable of growth over a broad temperature range, including sub-zero growth (below -10 to 37 °C), and at high salinity (0-19% NaCl), growing optimally at 25 °C, at pH 7.0-8.0 and in the presence of 2% NaCl. Its taxonomic and phylogenetic position was determined by using a polyphasic approach, which indicated that strain Or1(T) was a member of the genus Planococcus. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain Or1(T) belonged to the genus Planococcus, differing by 0.4-3.6% from the type strains of all recognized Planococcus species, and was related most closely to Planococcus antarcticus CMS 26or(T) (98.8% similarity) and Planococcus donghaensis JH1(T) (99.6%). However, DNA-DNA hybridization experiments showed that strain Or1(T) had low genomic relatedness to Planococcus antarcticus CMS 26or(T) (18%) and Planococcus donghaensis JH1(T) (46%). The major menaquinones of strain Or1(T) were MK-7 (55%), MK-8 (36%) and MK-6 (9%) and the major fatty acids were anteiso-C(15:0), C(16:1)ω7c alcohol and anteiso-C(17:0). The DNA G+C content of strain Or1(T) was 40.5 mol%. Differential phenotypic, phylogenetic and genomic data suggest that strain Or1(T) represents a novel species of the genus Planococcus, for which the name Planococcus halocryophilus sp. nov. is proposed. The type strain is Or1(T) ( = DSM 24743(T) = JCM 17719(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".