<i>Baffinella frigidus</i> gen. et sp. nov. (Baffinellaceae fam. nov., Cryptophyceae) from Baffin Bay: Morphology, pigment profile, phylogeny, and growth rate response to three abiotic factors
Bibliographic record
Abstract
Twenty years ago an Arctic cryptophyte was isolated from Baffin Bay and given strain number CCMP 2045. Here, it was described using morphology, water‐ and non‐water soluble pigments and nuclear‐encoded SSU rDNA . The influence of temperature, salinity, and light intensity on growth rates was also examined. Microscopy revealed typical cryptophyte features but the chloroplast color was either green or red depending on the light intensity provided. Phycoerythrin (Cr‐ PE 566) was only produced when cells were grown under low‐light conditions (5 μmol photons · m −2 · s −1 ). Non‐water‐soluble pigments included chlorophyll a , c 2 and five major carotenoids. Cells measured 8.2 × 5.1 μm and a tail‐like appendage gave them a comma‐shape. The nucleus was located posteriorly and a horseshoe‐shaped chloroplast contained a single pyrenoid. Ejectosomes of two sizes and a nucleomorph anterior to the pyrenoid were discerned in TEM . SEM revealed a slightly elevated vestibular plate in the vestibulum. The inner periplast component consisted of slightly overlapping hexagonal plates arranged in 16–20 oblique rows. Antapical plates were smaller and their shape less profound. Temperature and salinity studies revealed CCMP 2045 as stenothermal and euryhaline and growth was saturated between 5 and 20 μmol photons · m −2 · s −1 . The phylogeny based on SSU rDNA showed that CCMP 2045 formed a distinct clade with CCMP 2293 and Falcomonas sp. isolated from Spain. Combining pheno‐ and genotypic data, the Arctic cryptophyte could not be placed in an existing family and genus and therefore Baffinellaceae fam. nov. and Baffinella frigidus gen. et sp. nov. were proposed.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.015 | 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 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".