Freshwater Dalyelliidae from the Nearctic (Platyhelminthes, Rhabdocoela): new taxa and records from Ontario, Canada and Michigan and Alabama, USA
Bibliographic record
Abstract
Nine taxa of Dalyelliidae Graff, 1908 collected from limnic habitats in Ontario, Canada and Michigan and Alabama, USA are discussed. Two taxa are new to science. Pseudodalyellia alabamensis n. gen. n. sp. has a unique combination of characters (Microdalyellia-type stylet with two proximal heteromorphic axes of different size and two distal axes with long spines flanking a central spiny plate, uterus without uterine sphincter, glandular protrusion in male atrium) and is therefore placed in a new genus. Gieysztoria choctaw n. sp. is strikingly similar to the Amazonian G. chiqchi Damborenea et al., 2005 but differs by having 13 symmetrically arranged, heteromorphic spines of different size on its fenestrated girdle. Gieysztoria pavimentata (Beklemischew, 1926) Ruebush & Hayes, 1939 and Gieysztoria rubra (Fuhrmann, 1894) Ruebush & Hayes, 1939 discovered in Alabama are the first records for these species in the Nearctic. Remarks on the morphology and distribution of the new North American records of Gieysztoria dodgei (Graff, 1911) Ruebush & Hayes, 1939, Microdalyellia fairchildi (Graff, 1911) Gieysztor, 1938, Microdalyellia rossi (Graff, 1911) Gieysztor, 1938, Castrella truncata (Abildgaard, 1789) Hofsten, 1907 and Castrella pinguis (Silliman, 1884) Fuhrmann, 1900 are given. For G. pavimentata, M. fairchildi and C. truncata, new localities from the Palearctic are also mentioned.
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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 | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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".