Mahanarva (Ipiranga) nefasta, Meneghetti & Biganzoli-Rangel & Carvalho & Paladini, 2025

3.4. 11. Mahanarva (Ipiranga) nefasta sp. nov.

Figures 6 I View Figure 6 , 13 A – L View Figure 13

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 View Figure 13 ); 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 View Figure 13 ); 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 View Figure 13 ) 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 View Figure 13 ) 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 View Figure 13 ) subretangular, dorsal margin rounded and developed, apex rounded; subapical hook-like spine directed outwards and forward. Aedeagus (Fig. 13 G – I View Figure 13 ) 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 View Figure 13 ), with acute apex, basal process rounded and developed, directed downwards; second valvula (Fig. 13 L View Figure 13 ) 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 View Figure 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) .