Wroughtonia elongata, 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 : 14-19

Wroughtonia elongata , sp. nov.

Figures 38–47

TYPE MATERIAL: Holotype, ♀, “Hel.016” ( IEBR), NC Vietnam: Ha Tinh, Huong Son , 18°22′N 106°13′E, 900 m, April 20–28, 1998, Malaise [trap], AMNH, K. Long.

DISTRIBUTION: NC Vietnam: Ha Tinh (Huong Son).

BIOLOGY: Unknown.

DIAGNOSIS: Antenna with 46 segments; antennal segments 13–26 cream white; maxillary palp long, 1.9 × longer than head; frontal protuberance behind antennal sockets blunt apically, much higher than lateral frontal carina; in dorsal view width of head 1.4 × median length; height of eye 1.2 × temple; in lateral view, height of eye 1.5 × its transverse width; transverse width of eye 1.2 × temple. Mesosoma 2.4 × longer than high; notauli crenulated anteriorly, fused with longitudinal rugosities posteriorly; propodeum with basal carina and areola, rugulose-lacunose baso-laterally and sparsely rugose apically. Length of forewing 3.6 × its maximum width; pterostigma 4.0 × as long as wide; vein 3-SR 1.85 × longer vein r; vein 2-M 1.7 × 3-SR; hind wing vein 1-M 1.2 × vein 1r-m; vein 2-SC+R long, 0.4 × vein 1r-m; hind wing with 4 hamuli. Foretarsus 1.6 × foretibia; hind femur slender, with ventral serrations and stout tooth-shaped protuberance; length of hind femur (without tooth or serrations) 4.7 × as long as its maximum width; outer side of hind coxa and femur evenly punctate. First metasomal tergite long, slightly narrowed apically, 2.3 × as long as its apical width; dorsal carinae in basal 0.6 of tergite; second tergite long and almost parallel sided, median length of second tergite 1.5 × its basal width, and 1.4 × third tergite; second suture faint medially; first tergite nearly smooth laterally and apically, areolate-rugulose basally and medially; second and third tergites largely smooth.

NOTES: W. elongata , sp. nov., is similar to W. eurygenys Yan and Chen, 2017 , from China according to couplet 3b of the key by Yan et al. (2017), but differs as follows: (1) length of first metasomal tergite 2.3 × as long as its apical width (1.4 × in W. eurygenys ); (2) vein r of forewing 0.5 × 3-SR (0.8 × in W. eurygenys ) and (3) vein 1-M of hind wing 1.2 × longer than vein 1r-m (1-M 0.7 × 1r-m in W. eurygenys ).

DESCRIPTION: Holotype, ♀, body length 13.5 mm, forewing length 10.6 mm, ovipositor 28.2 mm (fig. 38).

Head: Antenna with 46 segments; third antennal segment 1.05 × as long as fourth segment (23:22); in frontal view height of eye 2.0 × its transverse width (32:16); width of face 1.8 × length of face and clypeus combined (41:23); malar space 0.9 × as long as mandible width (16:18) and 0.3 × height of eye (16:48) (fig. 40); maxillary palp long, 1.9 × as long as head (65:34); distance between tentorial pits 0.9 × distance between pit and eye (13:14); frontal protuberance behind antennal sockets blunt apically, much higher than lateral frontal carina; in dorsal view width of head 1.4 × its median length (68:49); height of eye 1.2 × as long as temple (24:20) (fig. 39); ocelli in high triangle, POL:OD:OOL = 11:7:21; distance between front and hind ocelli 0.3 × OOL (7:21) (fig. 39); in lateral view height of eye 1.5 × as long as its transverse width (33:22); transverse width of eye 1.2 × as long as temple (22:19) (fig. 41); face coarsely rugose; frons and vertex smooth; temple smooth with scattered fine punctures.

Mesosoma: Mesosoma 2.4 × longer than high (66:27); notauli crenulated anteriorly, fused with longitudinal rugosities posteriorly (fig. 42); median lobe of mesoscutum largely sparsely punctate, but rugose-punctate laterally; lateral lobes of mesoscutum sparsely punctate; scutellar sulcus rugose, with one median carina, 0.6 × as long as scutellum (14:22); scutellum rugosepunctate; pronotal side coarsely carinate-rugose medially, punctate dorsally, largely rugose ventrally; mesopleuron flat and smooth medially, sparsely punctate dorsally and ventrally (fig. 43); metapleuron foveate-rugose medially, coarsely rugose ventroapically; propodeum with basal carina and areola, rugulose-lacunose baso-laterally, sparsely rugose apically (fig. 45).

Wings: Length of forewing 3.6 × its maximum width (107:30); pterostigma 4.0 × as long as wide (32:8); vein 3-SR 1.85 × longer vein r; r:2-SR:3-SR:SR1:r-m = 7:12:13:56:10; vein 1-M distinctly curved (fig. 47); vein 1-CU1 thick, 1-CU1:cu-a:2-CU1 = 6:21:38; vein 2-M 1.7 × 3-SR (38:22). Hind wing: vein 1-M 1.2 × longer vein 1r-m (14:12); vein 2-SC+R long, 0.4 × as long as vein 1r-m (5:12); hind wing with 4 hamuli.

Legs: Foretarsus 1.6 × longer than foretibia (66:42); hind femur slender, with ventral serrations and stout tooth-shaped protuberance (fig. 44); length of hind femur (without tooth or serrations), tibia, and basitarsus 4.7 (84:18), 12.7 (127:10), and 8.75 × (35:4) as long as their maximum width, respectively; hind basitarsus 0.3 × as long as hind tibia (35:127), and 0.6 × as long as hind tarsal segments 2–5 (35:56); fourth hind tarsal segment 0.4 × as long as telotarsus (6:14); hind coxa and femur evenly punctate (fig. 44).

Metasoma: Metasoma 0.95 × as long as head and mesosoma combined (56:59); first metasomal tergite long, slightly narrowed apically, 2.3 × longer than its apical width (80:35) (fig. 46); dorsal carinae in basal 0.7 of tergite (53:80); second tergite long and almost parallel sided, median length of second tergite 1.5 × its basal width (52:35), and 1.4 × third tergite (52:37) (fig. 46); first tergite largely smooth laterally and apically, areolate-rugulose basally and medially (fig. 46); second suture faint medially; second and third tergites largely smooth; tergites 4–6 protruding latero-posteriorly; ovipositor sheath missing, ovipositor very long, 2.7 × as long as forewing (282:106), and 2.1 × as long as body (282:135).

Color: Body black, scapus brown; antenna brown, but yellowish brown basally, with antennal segments 13–26 cream white; palpi pale yellow, but first segments brownish yellow; fore- and middle legs yellow; hind coxa brown; hind trochanters and trochantellus yellow; hind femur yellow basally and brown apically; hind tibia yellow, but infuscate apically; hind tarsus whitish yellow; pterostigma and wing veins brown; wing membrane hyaline.

Male: Unknown.

ETYMOLOGY: From elongatus (Latin for “prolonged”), because of the elongate second metasomal tergite and the long ovipositor.

Figures

FIGURE 38. Wroughtonia elongata, sp. nov., habitus (holotype, female, lateral).

FIGURES 39–47. Wroughtonia elongata (holotype, female). 39. Head, dorsal. 40. Head, frontal. 41. Head, lateral. 42. Mesoscutum. 43. Mesopleuron. 44. Hind femur, lateral. 45. Propodeum. 46. Metasoma. 47. Forewing.