Eoplatypalpus Shamshev & Vasilenko & Perkovsky 2025, gen. nov.
Bibliographic record
Abstract
Genus Eoplatypalpus Shamshev, gen. nov. Type species. Eoplatypalpus sachalinensis sp. nov., by present designation. Middle Eocene amber of Sakhalin Island, Russia. Etymology. Referring to the Eocene period, with a suffix used to refer to Cretaceous genera of the subfamily (an allusion to the genus Platypalpus). The gender is masculine. Diagnosis. Male eyes probably narrowly dichoptic, bare, ommatidia of equal size; face broader than frons; thorax somewhat elongated, with small postpronotal lobes, prosternum separated from proepisternum, scutellum with 6 setae; mid femur slender, with simple setae ventrally; wing long, narrow, of nearly equal width at basal and apical third, cells br and bm of approximately equal lengths and almost aligned apically, br narrow, bm nearly 2X as wide as br, cell cua absent (vein CuA absent but some free portion of vein CuA+CuP present as scarcely visible trace), anal lobe reduced. Included species. Type species. Comparison. Eoplatypalpus gen. nov. possesses bare eyes and somewhat elongated thorax with small postpronotal lobe that would suggest a comparison of this genus primarily with representatives of the tribe Tachydromiini, Symballophthalmus Becker and the Mesozoic genera. The new genus differs from all extant genera of Tachydromiini and from the Mesozoic Archiplatypalpus by the presence of six scutellar setae (versus 2–4 setae) (Kovalev 1974, 1978; Grimaldi & Cumming 1999). On the other hand, Eoplatypalpus gen. nov. shares six scutellar setae with the Mesozoic Cretoplatypalpus (Taimyr amber, Russia) and with the extant Symballophthalmus (Kovalev 1978). The new genus differs from Cretoplatypalpus and Symballophthalmus primarily by the wing lacking cell cua (anal cell). However, cell cua is absent in the Mesozoic Mesoplatypalpus (Cedar Lake, Canadian amber) (Grimaldi & Cumming 1999). Eoplatypalpus gen. nov. differs from Mesoplatypalpus primarily by six scutellar setae (versus eight in Mesoplatypalpus) and longer costal vein (ending at apex of vein M 1 versus ending just slightly past apex of vein R 4+ 5 in Mesoplatypalpus) (Grimaldi & Cumming 1999). Finally, it should be added that the extant genus Megagrapha Melander has a combination of a separated prosternum, 6–8 scutellar setae and the wing lacking cell cua. However, this genus is placed in the tribe Drapetidini, possessing ommatrichia on the eyes and the subquadrate thorax lacking postpronotal lobes (Chillcott & Teskey 1983; Sinclair & Cumming 2006).
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.003 |
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".