Bibliographic record
Abstract
Genus Philetus Melander Philetus Melander, 1928: 110. Type species, Philetus memorandus Melander, 1928 (original designation). Melander, 1965: 455; Poole, 1996: 158, 368; Sinclair & Cumming, 2006: 74, 102–105, 107; Yang et al., 2007: 350; Marshall, 2012: 288; Cumming et al., 2014: 171, 205. Diagnosis. The genus is characterized by the following features: small size (body length 3.0–5.0 mm) brownish grey flies with silvery grey tomentum (Figs 1, 4); head produced obliquely downwards; ocelli positioned forward on broad V-shaped frons; eyes bare, dichoptic in male and female; inner eye incision present; antenna inserted just below middle of eye (Figs 5, 6); apical stylus slightly tapered with 3 articles including minute terminal hyaline process, subequal to or slightly shorter than length of pyriform postpedicel (Figs 7, 8); proboscis moderately long; epipharyngeal blades movable; palpus straight, directed forward (Figs 5, 6); head and thoracic chaetotaxy dark; mesonotal setae on each side with a few short irregular presutural acrostichal setae, row of 4–6 long dorsocentral and 3–4 intra-alar setae, 1–2 postpronotal setae, 1–2 presutural supra-alar setae, 2 notopleural setae, 1 postalar seta, and 2 (pairs) of long scutellar setae; mesopleuron and laterotergite bare; legs without prominent bristles; wing (Fig. 9) with venation complete (for Eremoneura), including nearly straight Sc reaching C, forked R4+5, cell cua angled apically with CuA curved back towards short evanescent CuA+CuP vein, basal costal bristle present, pterostigma faint, anal lobe developed; male terminalia (Figs 11–20) with median apical hypandrial process, gonocoxal apodeme projecting anteriorly as process from anterodorsal margin of hypandrium, postgonite broad, ejaculatory apodeme lever-like and articulated to base of phallus, phallus tubular with desclerotized apex, epandrium deeply emarginate with left and right lamella connected basally, epandrial lobe present apically, proctiger differentiated into a long ventral and short medial subepandrial lobe attached to prolonged dorsal cercus; female terminalia (Fig. 10) with terminal segments partially telescopic, tergite 10 undivided without acanthophorites, cercus narrow, spermatheca unpigmented and sac-like. Geographical distribution (Fig. 21). Known from Alaska and the Yukon Territory in the north to California, Nevada and Arizona in the south, including records from British Columbia, Washington, Oregon, Montana, Wyoming and Colorado (with undetermined female specimens listed in the Appendix). Remarks. In the Nearctic Region, this genus is most similar to Hesperempis Melander and somewhat like Hilara Meigen, but can be most easily distinguished from these empidid genera by the oblique form of the head with forward positioned ocelli and low inserted antennae. Philetus also has straight forward-directed palps and vein Sc nearly straight and joining C at an acute angle unlike Hilara. In addition, Hilara and most members of the Hilarini have vein R1 swollen prior to reaching C and males usually have the first tarsomere of the foreleg expanded (Sinclair & Cumming 2006). In their key to Nearctic genera of Empididae, Steyskal & Knutson (1981, p. 617) refer to a complete lack of thoracic setae in Hesperempis compared with Philetus, but this does not apply to all the included species of Hesperempis (Cumming et al. 2014). However, the dark setae on the head and thorax of Philetus are diagnostic compared with the pale more inconspicuous chaetotaxy of Hesperempis. Except for differences in the male and female terminalia, specimens of Philetus also resemble the brachystomatid genus Heleodromia Haliday, although they can be easily separated by the presence of a forked R4+5 wing vein in Philetus. Marshall (2012: 288, fig. 5) provided a good-quality photograph of a live female specimen of Philetus, which is reproduced here with permission (Fig. 1).
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.009 | 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".