Leuctra duplicata Claassen 1923
Bibliographic record
Abstract
Leuctra duplicata Claassen, 1923 Atlantic Needlefly http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org: TaxonName:460988 (Figs. 1–26, 33) Leuctra duplicata Claassen 1923:260. Holotype ♂ (CUIC), Labrador Lake (Cortland or Onondaga Co.), New York Leuctra duplicata Needham & Claassen, 1925:227. Leuctra duplicata Illies, 1966:88. Leuctra duplicata Zwick, 1973:399. Leuctra duplicata Hitchcock, 1974:75. Male. The dorsal abdominal process of the 8 th abdominal tergum emanates anteriorly, extending ca. ½ length of the segment and terminates on the posterior margin as a raised, bilobed process with small, distally rounded or subtriangular lobes (Figs. 13–15). The dorsal abdominal process of the 7 th abdominal tergum is nearer the anterior margin of the segment and raised as a bar with smaller, distally rounded lobes (Figs. 13–15). The paired dorsal processes exhibit variation, namely in the distance between lobes and “scaly” nature of the lobes that can be seen only with SEM (Figs. 13–15). The specilla are broadest medially in lateral view due to an expanded keel, noticeably thickened in dorsal ½, and taper very little distally (Figs. 1–6); the outer margin has low, tooth-like tubercles present along the outer distal ⅓ (Figs. 7–12); in caudal view the basal ⅓ is concave (Figs. 7–9, 11). The subanal lobes are widest basally, narrow and tapering slightly along entire length, slightly recurved anteriorly in distal ½, and extend nearly to the distal tip of the specilla (Figs. 1–6). The vesicle base is short, body expanded medially and ovoid in shape, and entire surface covered in long, socketed bristles (Fig. 16). Female. The 8 th abdominal sternum bears a prominent, broadly-rounded medial tubercle on the anterior ½ that occupies the medial ca. ½ of the segment (Figs. 17–26). The subgenital plate terminates in large, broadly rounded or subtriangular lobes separated by a v-shaped notch (Figs. 17–26). Distribution. Canada: NB, NS, ON, PE, PQ. USA: CT, MD, ME, NJ, NY, OH, PA, VA, WV (DeWalt et al. 2017), MA (Needham & Claassen 1925, p. 228), NC, RI, VT (new state records).
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.027 | 0.006 |
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".