Taxonomic study of the brown algal genus <i>Chorda</i> (Chordaceae, Laminariales) with description of the new species <i>Chorda borealis</i> from Alaska and northern Canada
Bibliographic record
Abstract
Chorda borealis sp. nov. is newly described from Alaska and northern Canada. Chorda borealis resembles C. filum and C. asiatica in gross morphology, but has a thinner cortical layer than those two taxa and is genetically distinct in the mitochondrial cox1 and cox3, plastid atpB, psbA and rbcL, and nuclear rDNA ITS1-5.8S-ITS2 region DNA sequences. The erect thalli are simple, cord-shaped, medium to light brown, and up to 90 cm in length and 2 mm in diameter. The mid-thallus cortex is composed of 2–4 cells and is 110–230 µm thick. When mature, unilocular zoidangia develop among unicellular clavate paraphyses and measure 30–48 µm long and 8–13 µm in diameter, containing presumably 16 zooids, each with an eyespot. The distributional pattern of C. borealis, which is distributed from the northern Pacific Ocean to the Labrador Sea and connected to the north-western Atlantic through the Arctic, suggests that the dispersal of Chorda species from the Pacific to the Atlantic could have occurred along the coasts of the north-western Arctic Sea.
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".