Streblocera (Eutanycerus) tuyenquangensis Long & Nhi 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 tuyenquangensis

description: Streblocera (Eutanycerus) tuyenquangensis Long, sp. n.
(Figs 34–45)
Material examined. Holotype, ♀, “Euph. 332” (IEBR), NE Vietnam: Tuyen Quang, Na Hang, Thanh Tuong, forest, MT, 22°19’01’’N 105°24’02’’E, 162m, 25.xii.2016, KDLong.
Diagnosis. Antenna with 23 antennomeres; scapus long, with tooth-shaped horn in basal 0.2 of scapus (Fig. 41); length of scapus 9.3 × its maximum width, and 2.2 × of head height (in dorsal view); tentorial pits at lower level of eyes (Fig. 36); malar space 1.2 × as long as basal width of mandible; mesosoma of mesosoma 1.8 × as long as its height; propodeum with short basal carina, smooth basally, largely areolate; first metasomal slightly narrowed behind spiracle, length of first metasomal tergite 2.3 × as long as its apical width; length of fore wing 0.8 × as long as body.
This new species is close to S. pila, but can be distinguished be having scapus slender, ventral tooth-shaped tubercle in basal 0.2 of scapus (0.3 in S. pila); apical width of first tergite 3.75 × its minimum width (3.0 × in S. pila); antenna with 23 antennomeres.
Description. Holotype, ♀, body length 4.8 mm, fore wing length 3.9 mm, ovipositor sheath 0.5 mm (Fig. 34).
Head. Antenna with 23 antennomeres; scapus long, length of scapus 9.3 × its maximum width (65: 7), with tooth-shaped horn in basal 0.2 of scapus (15: 65); scapus 2.2 × of head height (65: 30); third antennomere 1.3 × fourth (8: 6); second-seventh flagellomeres serrate ventrally (Fig. 40); length from eighth flagellomere to apex of antenna 0.9 × scapus (60: 65); in dorsal view, width of head 1.5 × its median length (44: 30), 1.4 × width of mesoscutum (without tegulae) (44: 31); ocelli small, POL: OD: OOL = 5: 3: 9 (Fig. 35); in lateral view, transverse diameter of eye 1.3 × temple (14: 11); eye as high as broad (14: 14); in frontal view, diameter of antennal socket 0.9 × between sockets (7: 8); face width 0.9 × length of face and clypeus combined (23: 25), and 1.3 × height of eye (23: 18); malar space 1.2 × as long as basal width of mandible (6: 5), and 0.3 × height of eye (6: 19); distance between tentorial pits 1.4 × distance from pit to eye margin (10: 7); face finely and densely punctate (Fig. 36); frons with sparse striae medially, sparsely punctate laterally (Fig. 35); vertex and temple almost smooth, with sparse punctures (Figs 35, 37).
Mesosoma. Length of mesosoma 1.8 × as long as its height (71: 39); notauli deep, largely crenulated (Fig. 38), fused posteriorly with large rugose area close to scutellar sulcus; scutellar sulcus rather wide, 0.6 × as long as scutellum (5: 8), with one carina (Fig. 38); mesoscutum and scutellum highly smooth; subalar depression almost smooth; pronotal side sparsely crenulated anteriorly, smooth ventrally and posteriorly (Fig. 39); precoxal sulcus wide, deep, sparsely crenulate; mesopleuron smooth; metapleuron rugose; propodeum with short basal carina, punctate basally, areolate-rugose medially and apically (Fig. 43).
Wings. Length of fore wing 3.1 × its width (115: 37); length of pterostigma 3.5 × its width (35: 10), and 1.3 × vein 1-R1 (35: 26) (Fig. 44); vein r arising just behind middle of pterostigma, 0.1 × as long as width of pterostigma (5: 35), and 0.2 × vein 1-R1 (5: 26); vein 1-CU1 thick, 1-CU1: cu-a: 2-CU1 = 2: 5: 15 (Fig. 44); length of hind wing 4.15 × its width (112: 27); 1-M: 1r-m: 2-SC+R = 4: 7: 7 (Fig. 45).
Legs. Length of hind femur, tibia and basitarsus, 6.0, 13.0 and 12.0 × as long as their width, respectively; hind tarsus 0.4 × hind tibia (24: 65); hind basitarsus 0.8 × second-fifth tarsus (24: 30); fourth hind tarsus 0.7 × fifth tarsus without pretarsus (5: 7).
Metasoma. First metasomal slightly narrowed behind spiracle; length of first tergite 2.3 × its apical width (34: 15); apical width of first tergite 3.75 × its minimum width (15: 4); first tergite depressed subapically, smooth basally and medially, striate laterally (Fig. 42); ovipositor sheath 0.2 × fore wing (22: 114), and 0.65 × first tergite (22: 34); ovipositor sinuate.
Colour. Body yellow, except metasoma, first metasomal tergite and ovipositor sheath brown; eyes silver-grey; wing veins pale yellow, except vein r and pterostigma ventrally brownish-yellow; wing membrane hyaline.
Male. Unknown.
Host: Unknown.
Etymology. Named after type locality, Tuyen Quang Province, Northeast Vietnam.
Distribution. Vietnam: Tuyen Quang (Na Hang).
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 411-414, DOI: 10.11646/zootaxa.4767.3.2, http://zenodo.org/record/3772959