Cheliplana elkhornica Karling 1989
Bibliographic record
Abstract
Cheliplana elkhornica Karling, 1989 Fig. 7 Material examined. New material. CANADA • 2 whole mounts; British Columbia, Calvert Island, North Beach; 51°39’53”N, 128°08’47”W; superficial sediment with coarse fraction in run off and intertidal pool near boulders; MI4184–MI4185. Reference material 1 whole-mounted specimen from California (holotype, SMNH Type 6800). Known distribution. Monterey Bay, California, United States (Karling 1989). Remarks. Our observations on the holotype and the new material from Canada mostly correspond to what was reported by Karling (1989). Live specimens are ~ 1.5 mm long (Fig. 7A). The haptic girdle (hg, Fig. 7A) is comprised of ~30 papillae. Proboscis hooks are smooth and are 20–25 μm (California) or 20–23 μm (Canada) long (h, Fig. 7B). Proboscis hook supports are ~30 μm long in the Canadian specimens. Blunt side pieces with at least two very short protrusions were observed in one Canadian specimen (sp, Fig. 7B). Karling (1989) describes only one testis above the pharynx. However, in one of the Canadian specimens (t, Fig. 7A, right specimen, dorsal view), paired testes could be observed. The other specimen from Canada appears to have only one testis, but it is clearly bilobed (t, Fig. 7A, left specimen, lateral view). A connection between the two lobes or testes may be present, or the orientation of the specimen may play a role in the appearance of the testes. The seminal vesicles are paired. The cylindrical copulatory bulb (cb, Fig. 7C–D) is ~140 μm (California) or 190–250 μm (Canada) long and is surrounded by strong longitudinal muscles. The prostatic glands contain a very coarse-grained secretion and enter the copulatory bulb proximally, where they form an elongate prostatic vesicle (pg, Fig. 7C–D). A short ejaculatory duct is separated from the cirrus by a muscular constriction (arrowhead, Fig. 7D). The cirrus measures ~75 μm (California) to 80–82 μm (Canada) and is lined with spines of 4–8 μm (California) up to 10 μm (Canada) (ci, Fig. 7A,C,D). The spines are arranged symmetrically, except for the distal part where their orientation appears slightly twisted (Fig. 15B–C in Karling 1989). A short, slightly sclerotised penis papilla (20–27 μm in the Canadian specimens) folds back over the distal part and can be everted (pp, Fig. 7D). The female reproductive system was described by Karling (1989) as ‘principally like those in C. californica ’. No vagina externa was observed. Anterior to the genital pore, Karling (1989) reports a small structure, which he interpreted as a temporary vagina. A bursa is situated alongside the ovary (b, ov, Fig. 7A). In the Canadian specimens, a slightly sclerotised tube was visible between the bursa and ovary (arrow, Fig. 7C). However, Karling did not observe a spermatic duct. Possibly, this structure is the ‘temporary vagina’ Karling referred to. The holotype and other whole-mounted specimens did not allow for more detailed observations.
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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 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.011 | 0.002 |
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".