The mid-Cambrian (Series 3, Drumian–Guzhangian; Marjuman) trilobite <i>Holmdalia</i> Robison, 1988, in western Newfoundland and its biostratigraphic significance
Bibliographic record
Abstract
Holmdalia Robison, 1988 (Family Marjumiidae), was proposed as a monotypic taxon that occurred in mid-Cambrian outer shelf settings in New York and Greenland, with a subsequent report from northwestern Canada. New collections from the Shallow Bay Formation of western Newfoundland record a succession of at least seven species that spans most of the Drumian and all of the Guzhangian stages, and demonstrate that the genus has considerable, previously unrecognized biostratigraphic potential. Older, Drumian species, including the type species, H. punctata (Rasetti, 1967), have longer palpebral lobes and, hence, larger eyes than a group of younger, Guzhangian species. Restudy of the type material shows that previous records of H. punctata outside the type area in New York are misidentifications, but the species does occur in Newfoundland. New Drumian species are H. palpebra and H. tenaga; an additional Drumian species is placed in open nomenclature. New Guzhangian species are Holmdalia glabra, H. lata, and H. tubercula.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".