Wroughtonia plana, 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 : 25-28

Wroughtonia plana , sp. nov.

Figures 71–81

TYPE MATERIAL: Holotype, ♀, “Hel.003” ( IEBR), NW Vietnam: Son La, Thuan Chau , Copia NR, 1200 m, 5.vi.2008, L.X. Hue.

DISTRIBUTION: NW Vietnam: Son La (Thuan Chau).

BIOLOGY: Unknown.

DIAGNOSIS: Antenna with 31 segments; antennal segments 3–19 pale yellow; maxillary palp 1.75 × as long as head; in frontal view width of face 1.8 × length of face and clypeus combined; frontal protuberance robust, higher than lateral frontal carina; in dorsal view width of head 1.5 × its median length; height of eye 1.9 × temple; in lateral view height of eye 1.3 × its transverse width; transverse width of eye 1.7 × temple; face coarsely rugose; frons, vertex, and temple mat. Mesosoma 2.3 × as long as high; notauli narrow, sparsely crenulate, fused posteriorly with median carina in rather flat posterior area of mesoscutum; scutellar sulcus 0.5 × as long as scutellum; propodeum with basal carina and areola; propodeal areola mat; propodeum transversely rugose laterally. Length of forewing 3.3 × its maximum width; vein 3-SR 1.45 × as long as vein r; vein 2-M 2.1 × 3-SR; hind wing vein 1-M 0.7 × vein 1r-m; vein 2-SC+R transverse, 0.2 × vein 1r-m. Foretarsus 1.65 × as long as foretibia; hind femur with ventral serrations and acute tooth-shaped protuberance; hind femur (without tooth or serrations) 3.8 × as long as its maximum width and rugose-punctate. First metasomal tergite 1.8 × its apical width; dorsal carinae in basal 0.6 of tergite; first tergite largely smooth, except sparsely punctate-reticulate medioapical area; median length of second tergite 0.9 × its apical width, and 1.25 × third tergite; second and third tergites smooth.

NOTES: W. plana , sp. nov., runs to W. eurygenys Yan and Chen, 2017 , from China in the key by Yan et al. (2017), but differs as follows: (1) in dorsal view length of eye 1.9 × as long as temple (1.2 × in W. eurygenys ); (2) first metasomal tergite 1.8 × as long as its apical width (1.4 × in W. eurygenys ); and (3) hind coxa and femur yellow and only infuscate apically (reddish brown in W. eurygenys ).

DESCRIPTION: Holotype, ♀, body length 7.8 mm, forewing length 7.3 mm, ovipositor sheath 7.7 mm (fig. 71).

Head: Antenna with 31 segments; third antennal segment 1.1 × fourth segment (15:14); maxillary palp 1.75 × as long as head (51:29); in frontal view height of eye 2.1 × its transverse width (23:11); width of face 1.8 × length of face and clypeus combined (29:16) (fig. 73); malar space 0.9 × as long as mandible width (10:11) and 0.3 × height of eye (10:34); frontal protuberance robust, higher than lateral frontal carina (fig. 74); in dorsal view width of head 1.5 × as long as median length (67:44); height of eye 1.9 × temple (27:14); POL:OD:OOL = 7:6:13; distance between front and hind ocelli 0.4 × OOL (5:13) (fig.); in lateral view height of eye 1.3 × as long as transverse width (34:26); transverse width of eye 1.7 × as long as temple (26:15) (fig. 74); face coarsely rugose; frons, vertex, and temple mat.

Mesosoma: Mesosoma 2.3 × longer than high (95:42); pronotal side crenulate anteriorly, largely rugose ventrally and posteriorly, punctate dorsally; mesopleuron flat, mat (fig. 76); metapleuron areolate-rugulose anteriorly, coarsely rugose posteriorly; mesoscutum with sparse punctures; notauli narrow, sparsely crenulate, fused posteriorly with median carina in rather flat area of mesoscutum (fig. 75); scutellar sulcus with 3+ carinae, 0.5 × as long as scutellum (8:17); scutellum sparsely punctate; propodeum with basal carina and areola; propodeal areola smooth medially, rugose-punctate laterally (fig. 78); propodeum transversely rugose laterally (fig. 78).

Wings. Forewing: length of forewing 3.3 × its maximum width (118:36); pterostigma 3.8 × as long as wide (50:13); vein 3-SR 1.45 × as long as vein r; r:2-SR:3-SR:SR1:r-m = 11:20:16:90; 1-CU1:cu-a:2-CU1 = 4:14:27; second submarginal cell trapezium shaped, vein 2-M 2.1 × 3-SR (33:16) (fig. 77); hind wing: vein 1-M 0.7 × 1r-m (17:23); vein 2-SC+R transverse, 0.2 × vein 1r-m (5:23); hind wing with 4 hamuli.

Legs: Foretarsus 1.65 × longer than foretibia (43:26); hind femur with ventral serrations and acute tooth-shaped protuberance (fig. 79); length of hind femur (without tooth or serrations) 3.8 × as long as its maximum width and rugose-punctate; hind coxa sparsely finely punctate laterally; hind tibia slightly curved basally (fig. 80); hind femur, tibia, and basitarsus 3.8 (79:21), 9.2 (110:12), and 6.3 × (38:6) as long as their width, respectively; hind basitarsus 0.35 × as long as hind tibia (38:110) and 0.7 × as long as hind tarsal segments 2–5 (38:52); fourth hind tarsal segment 0.3 × as long as telotarsus (5:17).

Metasoma: Metasoma 0.75 × as long as head and mesosoma combined (53:70); first tergite 1.8 × longer than its apical width (57:32); first tergite largely smooth, except sparsely punctate-reticulate medioapical area; dorsal carinae in basal 0.6 of tergite (32:57) (fig. 81); median length of second tergite 0.9 × its apical width (30:33), and 1.25 × third tergite (30:24); second and third tergites smooth; ovipositor sheath 1.1 × as long as forewing (77:73).

Color: Body black; scapus brown; antenna brown, with 13th–19th antennal segments pale yellow; palpi yellow; fore- and middle leg yellow; hind leg yellow, except hind femur and tibia apically brown; hind tarsus pale yellow; pterostigma and wing veins brown; wing membrane yellow; metasomal tergites and ovipositor sheath brown.

Male: Unknown.

ETYMOLOGY: From planus (Latin for “even, flat”), because of the flat mesopleuron.

Figures

FIGURE 71. Wroughtonia plana, sp. nov., habitus (holotype, female, dorsal).

FIGURES 72–81. Wroughtonia plana (holotype, female). 72. Head, dorsal. 73. Head, frontal. 74. Head, lateral. 75. Mesoscutum. 76. Mesopleuron. 77. Forewing. 78. Propodeum. 79. Hind femur and coxa, lateral. 80. Hind tibia, lateral. 81. Metasoma.