Arcuphantes arcuatulus Chamberlin & Ivie 1943
Bibliographic record
Abstract
Arcuphantes arcuatulus Chamberlin & Ivie, 1943 Figs 2A–E, 3A–C, 4, 7A–B Linyphia arcuata Keyserling, 1886: 74, pl. 13, f. 173 (Df; preoccupied by Thorell, 1856). Lepthyphantes arcuatus Petrunkevitch, 1911: 244. Lepthyphantes arcuatulus Roewer, 1942: 560 (replacement name). Arcuphantes arcuatus Chamberlin & Ivie, 1943: 21, f. 37-40 (Tf from Lepthyphantes, Dm; specific name is a primary homonym replaced by Roewer); Tu & Hormiga, 2010: 61, f. 2a-f, 9a (f). Material examined. 1♂, USA: Washington: Arlington, 48°N, 122°W, 9.ix.1935, Chamberlin & Ivie leg. (AMNH-161); 1♀ Washington: 10 miles north of Vancouver, 45°N, 122°W, 10.ix.1935, Chamberlin & Ivie leg. (AMNH-165). Diagnosis. The male A. arcuatulus can be distinguished from A. cruciatus n. sp., and A. denticulatus n. sp. by the bifid outer paracymbial arm with a blunt inner apophysis (Fig. 7B), and by the terminal apophysis having the anterior process turning backwards (Fig. 7A). The female can be distinguished by the epigynum in ventral view more slender than that of A. cruciatus n. sp., the prolonged basal part under the extensible base is almost square, with the parallel lateral margins slightly incurved (Fig. 3A–C). Description. Male (AMNH-161): Total length 1.94. Carapace 0.78 long, 0.63 wide. Abdomen 1.11 long, 0.53 wide. Female (AMNH-165): Total length 1.26. Carapace 0.57 long, 0.54 wide. Abdomen 0.75 long, 0.49 wide. Legs broken, data on leg lengths absent. Other somatic and genital characters: see the general description for the Arcuphantes species with arcuatulus - type genitalia. Distribution. USA (Washington).
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.013 | 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".