Bibliographic record
Abstract
Megalographa biloba (Stephens) (Figure 6, 12, 17) Plusia biloba Stephens 1830: 104. Type: male, BMNH, London [examined]; Type locality: unknown. Note: The species was nominally described from England, where it occurs occasionally as a fall migrant from North America, but Stephens was also known to have mixed North American material in with European material in error. Diagnosis. Megalographa biloba was thoroughly characterized by Lafontaine and Poole (1991) with adults and genitalia figured. It differs from M. talamanca in several aspects. In the region where M. talamanca was collected, three M. biloba were taken at lower altitudes (2200–2600m). These M. biloba are smaller (male wing length: 14.1mm; female wing length: 15.6mm) and the silver hemispheres of the stigma are joined. The postmedian line is notched between M3 and CUA 1 in M. biloba; in M. talamanca there is a defined dash. The silver crescent below the reniform spot is entire and prominent in M. biloba but often broken and indistinct in M. talamanca. In the male genitalia the clavus is approximately the length of the clasper in M. biloba but 0.25X its length in M. talamanca (M. biloba clasper (0.31mm) and clavus (0.31mm); M. talamanca clasper (0.50mm) and clavus (0.13mm). The subbasal evagination in the vesica is larger in M. biloba. In the female genitalia, the ductus bursae is 0.25X as long as the corpus bursae, whereas in M. talamanca it is 0.13X as long, and the corpus bursae has a mesial twist where the bursa bends through a 90 o angle that is absent in M. talamanca. Distribution and Habitat. Megalographa biloba is widely distributed from southern United States southward through Central and South America to Argentina. It occurs farther north into northern United States and southern Canada as a seasonal migrant where it usually produces one or two generations each summer, but it rarely survives the winter in the northern part of its range. It also occurs in the Hawaiian Islands but it is unknown if the species occurs there naturally or was introduced. The species also occurs as a rare migrant in Great Britain, mainly in the summer and fall, but its travel to Europe could be aided by ships crossing the Atlantic.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.022 | 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".