Wroughtonia (Neowroughtonia) angularis, Long & Van Achterberg & Carpenter & Oanh, 2020

Long, Khuat Dang, Van Achterberg, Cornelis, Carpenter, James M. & Oanh, Nguyen Thi, 2020, Review of the genus Wroughtonia Cameron, 1899 (Hymenoptera, Braconidae, Helconinae), with the description of 12 new species from Vietnam, American Museum Novitates 2020 (3953), pp. 1-56 : 5-7

Wroughtonia (Neowroughtonia) angularis , sp. nov.

Figures 1–13

TYPE MATERIAL: Holotype, ♀, “Hel.090” ( IEBR), NW Vietnam: Son La, Moc Chau ,

900 m, bushes, 25.iv.2014, sweep net, K.D. Long.

DISTRIBUTION: NW Vietnam: Son La.

BIOLOGY: Unknown.

DIAGNOSIS: Antenna with 35 segments and antennal segments 10–18 cream white; frontal protuberance lamelliform and acute dorsally; height of eye 1.55 × width of temple in lateral view. Mesosoma 1.9 × longer than high (in lateral view); notauli deep, crenulate anteriorly, posteriorly areolate-rugose and with a median carina; propodeum without areola, coarsely rugose. Foretarsus 1.3 × as long as foretibia; length of forewing 3.3 × its maximum width; vein 3-SR 1.15 × vein r; vein 2-M 2.3 × 3-SR; hind wing vein 1-M 0.95 × vein 1r-m; basal cell distinctly widened apically; vein 2-SC+R vertical; hind wing with four hamuli. Hind femur only with ventral serrations; length of hind femur 3.5 × its maximum width (without serrations); outer side of hind coxa and femur sparsely finely punctate. First tergite short, 0.9 × as long as its apical width; dorsal carinae present in basal 0.4 of tergite; median length of second tergite 0.5 × its basal width and 1.2 × third tergite; first tergite foveate-rugulose medially, largely rugose laterally; second tergite punctate-reticulate medially and rugose-punctate laterally.

DESCRIPTION: Holotype, ♀, body length 8.4 mm, antenna 6.2 mm, forewing length 6.9 mm, ovipositor sheath 7.0 mm (fig. 1).

Head: Antenna with 35 segments; third antennal segment 1.1 × as long as fourth (16:14); in anterior view height of eye 2.6 × as long as its transverse width (34:13); width of face 2.2 × length of face and clypeus combined (50:23); malar space 0.75 × as long as mandible width (15:20) and 0.6 × height of eye (20:34) (fig. 3); maxillary palp missing; distance between tentorial pits equal to distance from pit to eye margin; in dorsal view width of head 1.7 × its median length (80:47); height of eye 1.55 × as long as temple (28:18); POL:OD:OOL = 9:7:16; distance between anterior and posterior ocelli 0.25 × as long as OOL (4:16) (fig. 2); frontal protuberance lamelliform and acute dorsally (fig. 4); in lateral view length of eye 1.4 × its transverse width (36:26); transverse width of eye 1.4 × width of temple (26:19) (fig. 5); face coarsely rugose; frons, vertex, and temple almost smooth, somewhat coriaceous.

Mesosoma: Mesosoma 1.9 × longer than its height (79:42) (in lateral view); pronotal side crenulate anteriorly and medially, rugose ventrally and dorsally; mesopleuron almost flat, coriaceous (fig. 7); metapleuron areolate-rugulose; notauli deep, crenulate anteriorly, posteriorly areolate-rugose with a coarse median ruga (fig. 6); median lobe of mesoscutum smooth anteriorly, foveolate-rugose posteriorly; lateral lobes of mesoscutum almost smooth; scutellar sulcus deep, with carinae, 0.75 × as long as scutellum (12:16); scutellum narrowed laterally, coriaceous; propodeum without areola, transversely rugose (fig. 8).

Wings. Forewing: length of forewing 3.3 × its maximum width (116:35); pterostigma 3.5 × longer than wide (46:13); vein r arising from middle of pterostigma (16:30); vein 3-SR 1.2 × vein r (15:13); r:2-SR:3-SR:SR1:r-m = 13:20:15:83:19; vein cu-a oblique, 1-CU1:cu-a:2- CU1 = 5:14:23; second submarginal cell trapezium-shaped, long base 2.3 × as long as short base (35:15) (fig. 12); hind wing vein 1-M 0.95 × as long as vein 1r-m (19:20); basal cell distinctly widened apically; vein 2-SC+R vertical (fig. 13); hind wing with four hamuli.

Legs: Foretarsus 1.3 × longer than foretibia (55:43); hind femur with ventral serrations, without tooth-shaped protuberance (fig. 10); length of hind femur (without serrations), tibia, and basitarsus 3.5 (56:16), 8.3 (75:9), and 6.5 × (26:4) as long as their maximum width, respectively; hind tibia distinctly curved subbasally (fig. 9); hind basitarsus 0.8 × as long as hind tibia (59:75); hind basitarsus 0.74 × as long as hind tarsal segments 2–5 (26:35); fourth hind tarsal segment 0.40 × as long as telotarsus (4:10); outer side of hind coxa and femur sparsely finely punctate (figs. 9, 10).

Metasoma: Metasoma 0.7 × as long as head and mesosoma combined (34:50); first tergite short, 0.9 × as long as its apical width (46:49) (fig. 11); dorsal carinae present in basal 0.4 of tergite (20:46); median length of second tergite 0.5 × as long as its basal width (24:51), and 1.2 × as long as third tergite (24:20); first tergite foveate-rugulose medially, largely rugose laterally; second tergite punctate-reticulate medially and rugose-punctate laterally; third tergite smooth (fig. 11); ovipositor sheath slightly longer than forewing (70:69).

Color: Body black, scapus brown; remainder of antenna brown with third and fourth segments yellow and segments 10–18 cream white; palpi pale yellow; fore- and middle legs yellow, except whitish yellow tarsus; hind leg yellow, but hind tarsus whitish yellow, femur and tibia apically dark brown (figs. 9, 10); pterostigma brown; wing veins brownish yellow; wing membrane hyaline (figs. 12, 13).

Male: Unknown.

ETYMOLOGY: From angulus (Latin for “corner, bend”), because the mandible is angularly bent ventrally.

Figures

FIGURE 1. Wroughtonia angularis, sp. nov., habitus (holotype, female, lateral).

FIGURE 2–13. Wroughtonia angularis (holotype, female). 2. Head, dorsal. 3. Head, frontal. 4. Frontal protuberance, latreal. 5. Head, lateral. 6. Mesoscutum. 7. Mesopleuron. 8. Propodeum. 9. Hind tibia, lateral. 10. Hind femur and coxa, lateral. 11. Metasoma. 12. Forewing. 13. Hind wing.