Macrostomus fusciventris Rafael & Cumming, 2009, n. sp.
Bibliographic record
Abstract
Macrostomus fusciventris, n. sp. (Figs. 2a–f, 8) Diagnosis. Thorax and legs predominantly yellow, abdomen shining black; postcranium black with gray pruinescence; male tergite 8 acute distally; female without pinnate scales on hind tibia. Female wing approximately as wide as male wing, entirely brown infuscated. Description. Holotype male. Frons approximately one third anterior ocellus width. Face slightly wider than frons only at ventral margin. Postcranium black. Antenna black. Palpus brown. Thorax predominantly shining yellow, brown to black on disc of scutum, scutellum and subscutellum, sometimes with dark spot extending to front of scutum between dorsocentral setae; gray pruinescence more distinct on darker spots. Setae: 4 dorsocentrals; 1 supra-alar presutural; 1 pair of scutellar; 3–5 antepronotals; 1–3 tiny proepisternals; 3–5 katatergitals. Legs shining yellow with apex of mid and hind femora, entire hind tibia and mid and hind tarsi black; fore tarsus brown to black except tarsomere 2 white banded medially and tarsomere 3 white distally. Mid tibia with one dorsal seta at basal fifth; hind tibia with five slender dorsal setae intercalated with 5–6 shorter setae; first hind tarsomere with four longer dorsal setae. Wing with costal margin, pterostigma and distal patch brown infuscated (Fig. 2a); M 1 and M 2 slightly evanescent apically, not evanescent. Halter brown. Abdomen shining black with tergite 1 yellow laterally. Tergite 8 (Fig. 2b) acute distally. Epandrium with posterodorsal protuberance distinctly longer than anterodorsal protuberance. Anterior cercus thinner distally; posterior cercus with many anterodorsal and slender dorsal setae incurved, simple with few short spine-like setae at apex (Fig. 2c–d). Hypandrium (Fig. 2e) with a few setae medially, paired outward curved protuberances distally and acute subapical process medially. Size. Body length 3.4 mm; wing length 3.6 mm. Female. Frons approximately anterior ocellus width; face narrower than frons, approximately half anterior ocellus width. Fore tarsi black. Mid tibia with no setae on basal fifth; hind tibia with three slender dorsal setae on distal half and three shorter setae on basal half; first hind tarsomere with two longer dorsal setae; hind leg without pinnate scales. Wing slightly wider than in male, entirely brown infuscated (Fig. 2f) with anal margin lighter. Halter dark brown to black. Terminalia similar to M. flavus. Size. Body length 3.2 mm; wing length 3.3 mm. Geographical records. Brazil (Amazonas, Acre states), Fig. 8. Material. Holotype ♂: BRASIL, Amazonas, Pq [Parque] Nac [ional] [do] Jau, Rio Jau, Seringalzinho, 015028S–613523W, 01.viii.1995 // varredura, J.A. Rafael & J.F. Vidal (INPA). Paratypes: same data as holotype (1♂ 1♀ INPA, 1♀ CNC); Seringal, 27.iv–03.v.1995, varredura, J.A. Rafael & J.F. Vidal (1♂ INPA, 2♂ CNC); Acre, Cruzeiro do Sul, Rio Moa, 073702S–724615W, 15–28.xi.1996, varredura, mata, J.A. Rafael, J.F. Vidal & R. L. Menezes (2♂ 1♀ INPA, one male and one female in glycerin). Holotype condition. Good, not dissected. Etymology. From Latin fuscus = black, ventris = belly, in reference to the black color of the abdomen. Discussion. Macrostomus fusciventris, n. sp. appears close to M. ferrugineus (Fabricius), M. fuscithorax, n. sp. and M. melanothorax, n. sp. on the basis of the shape of male tergite 8, which is acute distally. Macrostomus fusciventris has the thorax predominantly yellow unlike M. fuscithorax and M. melanothorax, which both have a black thorax. It differs from M. ferrugineus, which also has a predominantly yellow thorax, in having an entirely black abdomen rather than a yellow or reddish abdomen, and in having one pair of scutellar setae rather than two pairs (rarely one pair in M. ferrugineus). It also differs from M. ferrugineus in the shape of the posterior cercus and the epandrium with the posterodorsal protuberance distinctly longer than anterodorsal protuberance.
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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 | 0.002 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 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".