SPINITECTUS MACROSPINOSUS N. SP. (NEMATODA: CYSTIDICOLIDAE) FROM THE CHANNEL CATFISH ICTALURUS PUNCTATUS IN SOUTHERN MANITOBA AND ITS DISTRIBUTION IN OTHER ICTALURUS SPP
Bibliographic record
Abstract
Spinitectus macrospinosus n. sp., a parasite of the channel catfish Ictalurus punctatus, from the Red and Assiniboine rivers in southern Manitoba, Canada, is characterized by spines reaching a maximum length of 21.8-26.8 microm (means for males and females, respectively) in the anterior esophageal region, arranged in 4 sectors in the anterior region of the body. Spines in this region of the body increase in size and decrease in number (from a maximum of 6 to 3 per sector). The combination of spine length, number, and arrangement and the position of the excretory pore (between spine rows 6 and 7) readily distinguishes it from all its North American congeners, including the species it is most similar to, S. carolini. It is different from S. gracilis and S. acipenseri in having a posteriorly directed vagina, an excretory pore between spine rows 6 and 7, a longer stoma, a right spicule with a terminal ventral barb, and a heart-shaped caudal mucron. Spinitectus macrospinosus is similar to other North American species of Spinitectus, e.g., S. carolini, S. micracanthus, S. mexicanus, S. osorioi, and S. humbertoi, in having the anterior rows of spines arranged in 4 sectors. It is also similar to S. micracanthus and S. carolini in possessing a relatively long stoma, a posteriorly directed vagina, a right spicule with a terminal ventral barb, and a heart-shaped caudal mucron. Furthermore, it is similar to S. carolini in possessing an "area rugosa" with 2 rows of precloacal cuticular cleats. In southern Manitoba, S. macrospinosus appears to mature only in the channel catfish. Reexamination of museum specimens revealed that the nematode also is found in I. furcatus in Kentucky Lake (Kentucky-Tennessee) and in I. lacustris in Lake Texoma (Oklahoma-Texas).
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".