On the morphology and phylogeny of the diatom species Rhizosolenia setigera: comparison of the type material to modern cultured strains, and a taxonomic revision
Bibliographic record
Abstract
The type material of Rhizosolenia setigera was examined and compared to isolates identified from Thai coastal waters and culture collections. The type slide, which is mounted in Canada Balsam, contains only a few cells that could be identified as R. setigera. Of those with resolvable girdle bands, multiple segmented girdle bands could be faintly seen as illustrated in the type description of R. setigera. Sequences from isolates identified as R. setigera reveal that it is not a monophyletic taxon. They fall into at least four different molecular clades. Only CCMP 1820, sequenced by Medlin, has a segmented band morphology corresponding to the band morphology of the cells on the type slide. All others have half bands in two to four columns and thus belong to different species. CCMP 1820 has been sequenced by three different labs. That from the Theriot lab is very different (14%) from the other two, which are nearly identical, and it must belong to a different taxon. A new genus Sundstroemia is described to accommodate the major setigera clade and the sequences of CCMP 1820 are assigned to the epithet setigera, whereas its closest sister taxa with half bands in two – four columns are assigned to a new species, S. pauciseries sp. nov. Rhizosolenia pungens and R. similoides are also moved into this new genus, but multiple sequences for these two taxa are not identical and none of the isolates have been compared to the type material of the two species.
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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 | 0.000 | 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) | 0.001 | 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 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".