Bibliographic record
Abstract
Ilybius angustior (Gyllenhal) Larval stages of this Holarctic species were described by Nilsson (1981). This species is common across boreal North America. The measurements included here are from direct measurement of reared and collected material. The measurements (means plus standard deviation) of anatomical parts and other diagnostic characters of this species are presented below. Note that the larvae of I. angustior and the equally widespread species I. picipes (Kirby) cannot be separated, therefore this description applies to both. Instar I. Colour. Head dorsally yellowishbrown with pale yellow areas. Thorax and abdomen brown. Legs and urogomphi pale brown. Head. HL = 0.96 ±.01 mm, HW = 0.95 ±.04 mm. Terminal antenna segment (A4) length = 0.82 of penultimate antenna segment. Sides of head parallel. Legs. Leg length: prothoracic leg = 1.13 mm, mesothoracic leg = 1.30 mm, metathoracic leg = 1.59 mm. Metathoracic leg length/HW = 1.69. Femora with one proximal seta in the PV series. Ventral spinulae on all tibiae and tarsi. Femora with spinulae in AV series. Abdomen. Terga 1–7 with pale spiniform setae, two submedial and one lateral on each side. Sterna with spiniform submedial setae. LAS = 0.73 ± 0.03 mm; UT = 1.19 ± 0.02 mm. LAS/UT = 0.61. Siphon long, SI/LAS = 0.55. Urogomphus with U4 spiniform, pale in colour, length of U4/length of U3 = 0.32; U2 and U3 longer, setiform and darker. Instar II. Colour. Head and body darker brown with pale spots on both areas. Legs and urogomphi brown. Head. HL = 1.46 ± 0.03 mm, HW = 1.34 ± 0.01 mm. Antenna with A4/A3 = 0.64; number of temporal spines five to seven. Legs. Leg length: prothoracic leg = 1.61 mm, mesothoracic leg = 1.85 mm, metathoracic leg = 2.34 mm. Metathoracic leg length/HW = 1.75. Tibiae and trasi with ventral spinulae. Spinulae located in the AV series of the femora. Pro and mesotarsi with secondary dorsal setae. Abdomen. Abdomen with primary setae setiform but short and pale. LAS = 1.17 ± 0.04 mm, UT = 1.56 ± 0.13 mm. LAS/UT = 0.75. Siphon shorter relative to instar 1, SI/LAS = 0.30. Instar III. Colour. Head and body dorsally dark brown with pale spots. Legs and urogomphi brown. Head. HL = 2.01 ± 0.04 mm, HW = 1.85 ± 0.04 mm; number of temporal spines five to seven; antenna with A4/A3 = 0.52. Legs. Leg length: prothoracic leg = 2.23 mm, mesothoracic leg = 2.65 mm, metathoracic leg = 3.47 mm; metathoracic leg length/HW = 1.86. Metafemur with AV spinulae. Abdomen. Terga with setae reduced in size and pale. LAS = 1.78 ± 0.09 mm; UT = 1.88 ± 0.09 mm; LAS/UT = 0.94. Siphon short, SI/LAS = 0.18.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".