Euodynerus furvus, Tran & Vu & Nguyen & Nguyen, 2025

Euodynerus furvus sp. nov.

Figs 4 A – D View Figure 4 , 5 A, B View Figure 5

Diagnosis.

The female of this species can be distinguished from other species of Oriental Euodynerus by the following combination of characters: Clypeus as wide as high, apical teeth spaced about 1 / 5 of the maximum width of the clypeus, noticeably reflexed and carinate; pronotal lateral surface concave, with concavity clearly separated from the dorsal surface by a blunt carina; TII with apical margin widely lamellate; SII in lateral view quite strongly convex, without a mediolongitudinal furrow basally; TI – II covered with deep and strong punctures, with interspaces larger than puncture diameter; mesoscutum as long as wide, densely and coarsely covered with flat-bottomed punctures, with interspaces raised to form reticulation.

Material examined.

Holotype: Vietnam: ♀; Lang Son province, Huu Lung, Huu Lien, Lan Nghe , Huu Lien NR, 21°33'48.6"N, 106°24'36.4"E, alt. 289 m, 11 Jun. 2018, Nguyen Thi Phuong Lien, Truong Xuan Lam, Tran Thi Ngat, Luong Viet Tuan, Nguyen Thi Thu Ha leg. GoogleMaps Paratype (deposited in IEBR). Vietnam: Son La: 1 ♀, Moc Chau, Chieng Nua , 20°43'18"N, 104°45'28"E, alt. 550 m, 23 Jun. 2020, Nguyen Thi Phuong Lien et al. Leg. GoogleMaps ; Vinh Phuc: 1 ♀, Me Linh biodiversity station , 25 May 2013, Nguyen Thi Phuong Lien leg. ; 1 ♀, Dak Lak, Ea Kar, Ea So, Ea So NR station N o 5 , 12°59'14.7"N, 108°40'17.8"E, alt. 78 m, 14 Apr. 2015, Nguyen Thi Phuong Lien, Nguyen Dac Dai, Nguyen Phuong Minh leg. GoogleMaps ; 1 ♀, Ha Tinh, Vu Quang, Sơn Kim 2, Vu Quang NP, Khe Che , 18°24'10.3"N 105°18'42.7"E, 10 Jul. 2023, Nguyen Thi Phuong Lien, Nguyen Quang Cuong, Tran Thi Ngat leg. GoogleMaps

Description.

Female. Body length 10–12 mm (holotype 12 mm); fore wing length 9.0–10.0 mm (holotype 10 mm).

Head in frontal view about 1.1 × as wide as high (Fig. 4 A View Figure 4 ). Inner compound eye margins slightly converging below, interocular distance about 1.1 × wider at vertex than at clypeus (Fig. 4 A View Figure 4 ). Clypeus in frontal view as wide as high, narrowly and weakly emarginate at apex; apical teeth spaced about 1 / 5 of the maximum width of clypeus, noticeably reflexed and carinate; carina prolonged throughout apical sixth of clypeus, delimiting a clearly depressed area; basal margin convex and not contacting antennal toruli (Fig. 4 A View Figure 4 ); clypeus in lateral view evenly convex in basal half, then straight to near apical margin, shallowly depressed near apex. Vertex with small cephalic foveae which placed at a large depress area which bordered by a faint arcuate carina; occipital carina complete, reflexed on upper three fourths of gena (Fig. 4 B View Figure 4 ). Gena about 0.4 × as wide as compound eye at bottom of ocular sinus; distance from posterior ocellus to occipital carina about 1.8 × as distance from posterior ocellus to inner compound eye margin. Mandible with five teeth. Scape long, 4.7 × as long as apically wide; FI 1.6 × as long as wide, FII subquadrate, FIII – IX wider than long, FX bullet-shaped, 1.2 × as wide as high.

Mesosoma 1.2 × as long as wide in dorsal view (Fig. 4 B View Figure 4 ). Pronotal carina complete and sharp, rounded on humeri; pronotum with lateral surface concave, concavity clearly separated from dorsal surface by a blunt carina (Fig. 4 C View Figure 4 ). Mesoscutum as long as wide, in lateral view weakly convex, somewhat flattened posteriorly (Fig. 4 B View Figure 4 ). Mesoscutellum slightly raised before meeting mesoscutum, disc of mesoscutellum almost flat; anterior margin crenate and forming 8–9 pits (Fig. 4 B View Figure 4 ). Metanotum oblique and evenly sloping to propodeum, transition from horizontal to vertical surface forming a sharp corner and strongly crenulate when viewed from front (Fig. 4 D View Figure 4 ). Epicnemial carina strong and complete, almost reaching pronotal margin. Propodeum excavated medially, posterior surface with a strong carina running from basal half to middle and a deep median furrow running from middle to apex; upper part of propodeum with well-distanced carinae forming a clearly visible large tooth at top (Fig. 4 E View Figure 4 ), dorsal surface smoothly connected to posterior surface; border between posterior and lateral surfaces angled (Fig. 4 E View Figure 4 ).

TI subcylindrical, with lateral margins almost parallel, as wide as TII, in dorsal view 1.7 × as wide as long. TII in dorsal view with weakly and evenly convex sides, 1.4 × as wide as long, with apical margin widely lamellate and reflexed (Fig. 5 A View Figure 5 ). SII in lateral view quite strongly convex (Fig. 5 B View Figure 5 ), without a basal longitudinal median furrow.

Body covered with short, silvery setae. Clypeus with sparse and strong punctures, bearing short setae; interspaces between punctures about as wide as or 2 × larger than puncture diameter, with minute punctures, area near apical margin with coarse sculpture. Frons with dense and coarse and shallow punctures, interspaces narrow and slightly raised to form week reticulation. Vertex and gena with punctures similar to those on frons but punctures deeper and stronger; lower part of gena with small and shallow punctures; vertex depress medially. Scape with sparse small punctures. Pronotum with coarse punctures, spaces between punctures narrow, strongly raised to form reticulation. Mesoscutum densely and coarsely covered with flat-bottomed punctures, with interspaces raised to form reticulation. Mesoscutellum and metanotum with punctures similar to those on mesoscutum. Tegula with sparse minute punctures. Mesepisternum with flat-bottomed punctures, larger and denser posterodorsally, smooth ventrally; mesepisternum with bigger and coarser punctures posterodorsally than on pronotum, barely punctured anteroventrally; epicnemial carina positioned at border between posterodorsal and anteroventral part. Metepisternum with weak short striae laterally and small punctures at upper parts of dorsal area, with sparse shallow punctures in ventral area. Propodeum with punctures on dorsal surface very large, interspaces strongly raised to form reticulation, punctures on lateral parts much smaller and shallower than in dorsal part, posterior surface shiny with strong sparse punctures, with oblique short striae lateral of median furrow.

TI – II covered with large and deep punctures, with interspaces as wide as or smaller than puncture diameter, punctures near apical margin of TII deeper and coarser than those on other parts of tergum, punctures on TIII – IV similar to those near apical margin of TII, punctures on TV smaller and weaker than those on TII – IV, TVI with minute punctures; punctures on sternum II deeper and larger than those on TII.

Color. Black; following parts light yellow: small spot on vertex behind compound eye, spots at anterior margin of pronotum, apical margin of TII, and a small spot at lateral corner of SII. Ventral surface of scape reddish brown. Wings dark brown.

Male. Unknown.

Distribution.

Vietnam (Lang Son, Son La, Vinh Phuc, Ha Tinh, Dac Lak).

Etymology.

The specific epithet is from the Latin adjective furvus (meaning, “ black ”), and refers to the black body of this species.

Remarks.

This species is seemingly close to E. koenigsmanni Giordani Soika, 1972 by having the pronotum concave laterally and the clypeus noticeably reflexed and carinate, but can be separated by the following characters: TII with well-developed lamella and reflexed at apical margin (TII not reflexed at apical margin in E. koenigsmanni ); SII without a basal mediolongitudinal furrow (SII with a short basal mediolongitudinal furrow in E. koenigsmanni ).