Streblocera (Eutanycerus) intermedia Long 2020, sp. n.
Creators: name: Long, Khuat Dang
name: Nhi, Pham Thi
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Streblocera
Streblocera intermedia

description: Streblocera (Eutanycerus) intermedia Long, sp. n.
(Figs 1–11)
Material examined. Holotype, ♀, “Euph. 117 ” (IEBR), NW Vietnam: Hoa Binh, Yen Thuy, forest, MT 20°23’N 105°34’E, 300m, 10–20.iii.2002, KD Long. Paratypes, 2 ♀, “Euph. 118 ”, “Euph. 119 ” (IEBR), locality as holotype; 1 ♀ “Euph. 111 ” (IEBR), ibid. but 01–10.iv.2002, KD Long.
Diagnosis. Antenna with 21 antennomeres; scapus slender, with tooth-shaped horn in basal 0.2 of scapus (Fig. 8); length of scapus 7.8 × its maximum width, and 2.0 × of head height (in dorsal view); tentorial pits at lower level of eyes (Fig. 3); malar space 1.5 × as long as basal width of mandible; mesosoma 1.6 × as long as its height; propodeum rugose baso-laterally, areolate-rugose medially and apically; first metasomal indistinctly narrowed behind spiracle, 2.45 × as long as its apical width; apical width 2.75 × as long as its minimum width.
Description. Holotype, ♀; body length. 3.5 mm, fore wing length 3.1 mm, ovipositor sheath 0.5 mm (Fig. 1).
Head. Antenna with 21 antennomeres; scapus slender, length of scapus 7.8 × its maximum width (47: 6), with tooth-shaped horn in basal 0.2 of scapus; scapus 2.0 × of head height (47: 23); third antennomere 1.2 × fourth (6: 5); second-seventh flagellomeres serrate ventrally (Fig. 7); length from eighth flagellomere to apex of antenna equal to scapus (47: 47); in dorsal view, width of head 1.6 × its median length (37: 23), and 1.6 × width of mesoscutum (without tegulae) (37: 23); temple roundly narrowed behind eye; length of eye 1.85 × as long as temple (13:7); ocelli small, POL: OD: OOL = 3: 2: 8 (Fig. 2); eye 2.85 × as high as broad (20: 7); in lateral view, transverse diameter of eye twice length of temple (14: 7); in frontal view, diameter of antennal socket 0.9 × between sockets (9: 10), diameter of antennal socket as long as distance between sockets (7: 7), face width equal to length of face and clypeus combined, and 1.2 × height of eye (18: 15); clypeus margin straight; malar space 1.5 × as long as basal width of mandible (6: 4), and 0.4 × as long as eye height (6: 16); distance between tentorial pits 1.6 × distance from pit to eye margin (8: 5); face finely punctate; clypeus with dense fine punctures (Fig. 3); frons rugo-punctate (Fig. 2); temple and vertex polished, with sparse punctures (Figs 2, 4).
Mesosoma. Length of mesosoma 1.6 × as long as its height (50: 31); notauli deep, sparsely crenulated, widened posteriorly, largely rugose (Fig. 5); prescutellar sulcus wide, deep, 0.6 × as long as scutellum (4: 7), with one carina (Fig. 5); scutellum convex, almost smooth; subalar depression almost smooth; pronotal side crenulated medially, smooth dorsally, ventrally with sinuate rugae (Fig. 6); precoxal sulcus wide, sparsely crenulated; mesopleuron smooth; metapleuron and propodeum largely rugose; median lobe of mesoscutum finely sparsely punctate; lateral lobes almost smooth.
Wings. Length of fore wing 2.9 × its width (124: 43); length of pterostigma 3.0 × its width (30: 10), 1.5 × vein 1-R1 (30: 20) (Fig. 11); vein r arising distinctly behind middle of pterostigma, 0.1 × as long as width of pterostigma (3: 30), and 0.15 × vein 1-R1 (3: 20); vein 1-CU1 short and thick, nearly quadrate (Fig. 11); vein cu-a 0.3 × vein 2-CU1 (4: 12); length of hind wing 4.3 × its width (98: 23); 1-M: 1r-m: 2-SC+R = 2: 7: 6.
Legs. Length of hind femur, tibia and basitarsus 7.0, 17.3 and 11.0 × as long as their width, respectively; hind basitarsus 0.9 × hind tibia (49: 55); hind basitarsus 0.4 × hind tibia (22: 55), and 0.8 × second-fifth tarsus (22: 27); fourth hind tarsus 0.7 × fifth tarsus without pretarsus (4: 6).
Metasoma. Length of first tergite 2.45 × its apical width (27: 11), apical width of first tergite 2.75 × its minimum width (11: 4); ovipositor sheath 0.15 × fore wing (19: 124), and 0.7 × first tergite (19: 27); ovipositor flat, sinuate; first metasomal tergite smooth basally, longitudinally striate medially and apically (Fig. 10), remaining tergites very smooth.
Colour. Head and mesosoma yellow; eyes silver-grey; legs and metasoma pale yellow, except first metasomal tergite and ovipositor sheath brown; wing veins yellow; wing membrane hyaline.
Male. Unknown.
Host: Unknown.
Etymology. From “inter” (Latin for between), because this species is intermediate between Streblocera quangbinhensis, sp. n. and S. tuyenquangensis, sp. n.
Variation. Paratypes, females, body length 3.3–3.5 mm, fore wing 2.7–2.9 mm, ovipositor sheath 0.4–0.5 mm.
Distribution. Vietnam: N Vietnam: Ninh Binh (Cuc Phuong); NC Vietnam: Ha Tinh (Huong Son), Quang Binh (Minh Hoa).
description: Published as part of Long, Khuat Dang & Nhi, Pham Thi, 2020, Notes on the genus Streblocera Westwood, 1883 (Hymenoptera: Braconidae: Euphorinae) from Vietnam, with description of four new species, pp. 402-414 in Zootaxa 4767 (3) on pages 404-406, DOI: 10.11646/zootaxa.4767.3.2, http://zenodo.org/record/3772959