Mahanarva (Ipiranga) nefasta Meneghetti, Biganzoli-Rangel, Carvalho & Paladini, 2025, sp. nov.
Bibliographic record
Abstract
3.4. 11.Mahanarva(Ipiranga)nefastasp. nov. Figures 6 I, 13 A – L Measurements male / female. Head length: 0.84 / 0.97; head width: 1.87 / 2.02; pronotum length: 1.57 / 1.83; pronotum width: 2.75 / 3.01; tegmen length: 7.67 / 8.35; tegmen width: 2.33 / 2.4; total length: 9.1 / 10.22 (in mm). Diagnosis. Tegmina brownish with one complete, yellowish transverse band between basal and median third, and an incomplete transverse band between median and apical third; subgenital plate not excavated at the basal portion and with an acute apex; paramere apex rounded. Description. Head black, vertex subretangular with a slightly marked median carina in the apex, but indistinct on its base, ocelli closer to each other than to eyes, separated by about one diameter from each other; tylus quadrangular, black, with its basal third with slightly marked carina, becoming indistinct towards the apex (Fig. 13 A); antenna brownish, pedicel sparsely setose; basal body of flagellum subcylindrical with a single and short arista shorter than the pedicel length. Postclypeus black, inflated, with convex profile, longitudinal carina present, lateral grooves slightly marked (Fig. 13 B, C); rostrum with second segment yellowish and third segment brownish, reaching the base of mesocoxae. Pronotum black, hexagonal, with muscular insertions slightly apparent, median carina slightly marked; anterior and anterolateral margins straight; posterolateral with slight sinuosity and posterior margin medially grooved, humeral angles acute; scutellum black, with slight central concavity and slightly marked horizontal grooves. Tegmina (Fig. 13 A, B) brownish, narrow, with one transverse complete band yellowish between basal and median third and an incomplete yellowish band resembling rounded spots, between median and apical third; veins M and Cu 1 united at base, veins A 1 and A 2 distincts, apical reticulation undeveloped, prominent venation. Hindwings hyaline, with brownish venation, Cu 1 thickened at the base, hamuli with three spines. Legs light brown, metathoracic femur with a small apical spine; tibia with two lateral spines, basal one smaller than the ones located at apical crown, which has 12–14 spines arranged in two rows; basitarsus with three rows of spines covered by long setae; subungueal process present. — MALE: Genitalia: Pygofer (Fig. 13 D, E) with one finger-like processes between anal tube and subgenital plate; subgenital plate long, not excavated at the basal portion, covered with small tooth-like spines, and narrowing towards the apex, which is acute. Paramere (Fig. 13 F) subretangular, dorsal margin rounded and developed, apex rounded; subapical hook-like spine directed outwards and forward. Aedeagus (Fig. 13 G – I) subcylindrical, narrowing towards apex with a pair of straight dorsal processes, shorter than half the length of the shaft and inserted between middle and apical third of aedeagus. — FEMALE: Morphology similar to that of the male, but slightly larger in relation to total body length. First valvula of ovipositor long (Fig. 13 J, K), with acute apex, basal process rounded and developed, directed downwards; second valvula (Fig. 13 L) long with rounded apex and dorsal margin covered by teeth in apical third; third valvula short and wide, with rounded apex, covered ventrally by long setae. Remarks. This species was being treated as M. (I.) aguirrei mainly by the pattern and coloration of the tegmina, and the phylogenetic analysis presented here corroborates a close relationship between these species (Fig. 4). Despite this, they differ in several aspects in relation to male genitalia: while M. (I.) aguirrei presents a long subgenital plate with rounded apex and a rounded depression on its basal third, M. (I.) nefasta sp. nov. has an acute subgenital plate apex. Moreover, M. (I.) aguirrei has a subquadrangular paramere apex, which differs from the rounded paramere apex seen in M. (I.) nefasta sp. nov. In comparison to the other species within the subgenus, this species presents a more developed basal process of the ovipositor. Etymology. The new species name is due to the fact that it had long been mistaken for M. (I.) aguirrei in our morphological analyses. Distribution. Brazil (Minas Gerais). Material examined. BRASIL, Holotype ♂: Minas Gerais: Uberaba, 04.i.1984, Koller, W. W. leg. (MCTP); Paratypes: same data as holotype, 8 ♂, 6 ♀ (DZUP). Adicional material examined. BRASIL, Minas Gerais: Uberaba, 04.i.1984, Koller, W. W. leg. 9 ♂, 3 ♀ (MCTP).
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 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) | 0.011 | 0.004 |
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".