Streblocera (Eutanycerus) trangana Long & Pham 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 trangana

description: Streblocera (Eutanycerus) trangana Long & Pham, sp. n.
(Figs 23–33)
Material examined. Holotype, ♀, “Euph. 347 ” (IEBR), N Vietnam: Ninh Binh, Trang An, Den Tran, limestone forest, light trap, 11.vi.2018, Pham, T.N. Paratype 1 ♀, “Euph. 348 ” (IEBR), locality as holotype.
Diagnosis. Antenna with 19 antennomeres; scapus robust, with tooth-shaped horn in basal 0.3 of scapus (Fig. 30); length of scapus 4.7 × its maximum width, and 1.7 × of head height (in dorsal view); second-seventh flagellomeres serrate ventrally; tentorial pits below lower level of eyes (Fig. 25); malar space 1.4 × as long as basal width of mandible; temple wide, in lateral view, transverse diameter of eye 2.3 × temple; mesosoma 1.6 × as long as its height; propodeum distinctly convex anteriorly higher upper level of scutellum; propodeum largely rugose; first metasomal indistinctly narrowed behind spiracle, 2.0 × as long as its apical width; first tergite almost smooth medially and apically, rugose basally, striate laterally and subapically (Fig. 31).
Description. Holotype, ♀, body length 3.3 mm, fore wing length 2.9 mm, ovipositor sheath 0.4 mm (Fig. 23).
Head. Antenna with 19 antennomeres; scapus robust, length of scapus 4.7 × its maximum width (42: 9); with tooth-shaped horn in basal 0.3 of scapus (14: 42); scapus 1.7 × of head height (42: 25); third antennomere 1.4 × fourth (7: 5); second-seventh flagellomeres serrate ventrally (Fig. 29); length from eighth flagellomere to apex of antenna 0.9 × scapus (37: 42); in dorsal view, temple roundly narrowed behind eye; width of head 1.6 × its median length (39: 25), 1.5 × width of mesoscutum (without tegulae) (39: 26); ocelli small, POL: OD: OOL = 5: 2: 8 (Fig. 24); in lateral view, transverse diameter of eye 2.3 × temple (14: 6); length of eye 1.75 × as long as broad (14: 8); in frontal view, diameter of antennal socket 2.0 × distance between sockets (8: 4); face width subequal to length of face and clypeus combined (20: 21), and 1.3 × height of eye (20: 15); clypeus margin straight; malar space 1.4 × as long as basal width of mandible (7: 5), and 0.5 × as long as eye height (7: 15); distance between tentorial pits 1.3 × distance from pit to eye margin (8: 6); face setose, rugo-punctate (Fig. 25); frons and vertex sparsely punctate (Fig. 24); temple smooth (Fig. 26).
Mesosoma. Mesosoma highly convex, length of mesosoma 1.6 × as long as its height (55: 34) (Fig. 28); notauli wide, sparsely crenulated anteriorly, rugose posteriorly, fused with largely rugose area of mesoscutum close to scutellar sulcus (Fig. 27); prescutellar sulcus rather wide, smooth, with one carina, and 0.6 × as long as scutellum (4: 7) (Fig. 27); mesoscutum and scutellum almost smooth, with finely scattered punctures; subalar depression rugose; pronotal side almost smooth (Fig. 28); precoxal sulcus wide, sparsely crenulated (Fig. 28); mesopleuron smooth medially; metapleuron rugose; propodeum with short basal carina, coarsely rugose entirely (Fig. 32).
Wings. Length of fore wing 2.7 × its width (118: 43); length of pterostigma 3.4 × its width (27: 8), and 1.6 × vein 1-R1 (27: 17) (Fig. 33); vein r arising distinctly behind middle of pterostigma, and 0.1 × as long as width of pterostigma (3: 27), and 0.2 × vein 1-R1 (3: 17); vein 1-CU1 short and thick, near quadrate (Fig. 33); vein cu-a 0.33 × vein 2-CU1 (4: 12); length of hind wing 4.1 × its width (90: 22); vein 1-M: 1r-m: 2-SC+R = 2: 6: 5.
Legs. Length of hind femur, tibia and basitarsus 6.2, 12.5 and 10.0 × as long as their width, respectively; hind basitarsus 0.4 × hind tibia (20: 50); hind basitarsus 2.85 × second-fifth tarsus (20: 27); fourth hind tarsus 0.8 × fifth tarsus without pretarsus (5: 6).
Metasoma. Length of first tergite 2.0 × its apical width (30: 15); apical width of first tergite 3.0 × its minimum width (15: 5); ovipositor sheath 0.2 × fore wing (19: 118), and 6.3 × first tergite (19: 30); first tergite almost smooth medially and apically, rugose basally, striate laterally and subapically (Fig. 31); ovipositor sheath 0.1 × as long as fore wing; ovipositor sinuate.
Colour. Body yellow, except first metasomal tergite and ovipositor sheath yellowish-brown; eyes silver-grey; wing veins pale yellow; wing membrane hyaline.
Male. Unknown.
Host: Unknown.
Etymology. Named after type locality, Trang An Scenic Landscape Complex, Ninh Binh Province, Northern Vietnam.
Variation. Paratype, female, body length 3.1 mm, fore wing length 2.6 mm; ovipositor sheath 0.4 mm.
Distribution. N Vietnam: Ninh Binh.
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 409-411, DOI: 10.11646/zootaxa.4767.3.2, http://zenodo.org/record/3772959