Thanatoplagia Alekseev et Bukejs 2024, gen. nov.
Bibliographic record
Abstract
Genus Thanatoplagia Alekseev et Bukejs gen. nov. Type species: Thanatoplagia tamutisi Alekseev et Bukejs sp. nov., designated herein Taxonomic assignment. The specimen under study belongs to the tribe Sarrotriini based on the combination of the following characters: (1) dorsally concealed antennal insertions; (2) antennae setose, stout, 10- or 11-segmeneted, without clearly separated antennal club; (3) antennal insertions distant from eyes; (4) procoxal cavities open posteriorly; (5) all tarsi tetramerous, not dilated; and (6) metacoxae separated by intercoxal abdominal process rounded apically. Differential diagnosis. The tribe Sarrotriini includes three extant genera from the Western Palearctic: Diplagia Reitter, 1882, Orthocerus Latreille, 1796, and Helioctamenus Schauffuss (Ślipiński & Schuh 2008). Despite the apparent similarity, we conclude that the studied fossil cannot be attributed to any of these genera, and thus we propose a new genus for this fossil beetle. Thanatoplagia gen. nov. clearly differs from Diplagia in lacking interfacetal setae, but possessing sparsely setose antennae, and pronotum distinctly narrower than elytral base; differs from Orthocerus in antennal structure (gradually widened towards apex, not fusiform, sparsely and shortly setose in the new genus); and it differs from Helioctamenus in having stout and strongly transverse antennomeres 4–9, and pronotum with three distinct impressions (two oval transverse, shallow impressions laterobasally and one large, rounded impression anteromedially). The new fossil genus differs from other similar sarrotriines in a well-developed antennomere 11 (as long as antennomere 10), pronounced humeri and developed metathoracic wings. Etymology. The name of the new genus is a compound word and combines the old Greek word θάνατος (thánatos, death) and the old Greek word πλαγία (plagía, slope or hillside) referring to Diplagia, the extant genus of the tribe Sarrotriini. The gender is feminine. Description. The new genus is monotypic. Therefore, the generic description considerably overlaps that of the type species.
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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 | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 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".