Revision of the Afrotropical species of the hover fly genus Mesembrius Rondani (Diptera, Syrphidae) using morphological and molecular data
Bibliographic record
Abstract
The Afrotropical representatives of the hover fly genusMesembriusRondani, 1857 (Diptera) are divided into two subgenera, namelyMesembriuss.s. andVadonimyiaSéguy, 1951 and, in this present work, the subgenus Mesembrius s.s. is revised. A total of 23Mesembriuss.s. species are recognised for the Afrotropics. Known species are re-described and six species new to science are described:Mesembrius arcuatussp. nov.,M. copelandisp. nov.,M. longipilosussp. nov.,M. sulcussp. nov.,M. tibialissp. nov.andM. vockerothisp. nov.Mesembrius africanus(Verrall, 1898) is considered a junior synonym ofM. senegalensis(Macquart, 1842),M. cteniferHull, 1941 a junior synonym ofM. caffer(Loew, 1858),M. lagopus(Loew, 1869) a junior synonym ofM. capensis(Macquart, 1842) andM. platytarsisCurran, 1929 a junior synonym ofM. simplicipesCurran, 1929. The females ofMesembrius chapiniCurran, 1939,M. rexCurran, 1927 andM. regulus(Hull, 1937) are described for the first time. Lectotypes are designated forMesembrius caffer,M. capensis,M. cyanipennis(Bezzi, 1915),M. minor(Bezzi, 1915),M. senegalensis,M. strigilatus(Bezzi, 1912) andM. tarsatus(Bigot, 1883). Separate identification keys for males and females are presented. We obtained 236 DNA barcodes for 18 species. The relationships amongst the differentMesembriusspecies are briefly discussed, based on morphological and DNA barcode data.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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".