Stantonia dickyyui van Achterberg & Long

Achterberg, Cornelis van, Long, Khuat Dang & Chen, Xue-xin, 2017, Review of Stantonia Ashmead (Hymenoptera, Braconidae, Orgilinae) from Vietnam, China, Japan, and Russia, with descriptions of six new species, ZooKeys 723, pp. 61-119 : 76-77

Stantonia dickyyui van Achterberg & Long sp. n. Figs 23, 24-35

Stantonia xiangqianensis ; Long and van Achterberg 2014: 408.

Material.

Holotype, ♀ (RMNH), "N. Vietnam: Viet Try, n[ea]r Thanh Son, Thuong Cuu, 20°59'N, 105°8'E, 350-400 m, 11-16.x.1999, Malaise traps, R. de Vries, RMNH’99”. Paratypes (2 ♀ + 2 ♂): 1 ♀ (RMNH), "N. Vietnam: Ninh Binh, Cuc Phuong N.P., n[ea]r centre ([Mal. tr.] I), c. 225 m, 20.xii.1999-10.ii.2000, Mai Phu Quy, RMNH’00”; 1 ♂ (RMNH), id., but 15.iii.-14.ix.2000; 1 ♂ (RMNH), id., but 1.xi.-20.xii.2000; 2 ♀ (RMNH, IEBR), "C. Vietnam: Ha Tinh, Vu Quang N.P., 18°17'38"N, 105°25'25"E, 169 m, 24.ix.-5.x.2009, Taiw[an] tr[ap] 11, C. v. Achterberg & R. de Vries, RMNH’09”; 1 ♂ (VNMN), “Orgi.069”, "NC. Vietnam: Ha Tinh, Vu Quang N.P., forest, 6.x.2009, K.D. Long".

Diagnosis.

Basal half of antenna yellowish, without ivory or white segments, its apical half, and outer side of scapus and pedicellus darkened; vertex finely spaced punctate and interspaces distinctly wider than punctures and yellowish brown; mesosoma entirely yellowish brown; inner half of humeral plate yellowish brown, remainder and tegulum brownish yellow; propodeum mainly smooth, medially with coarse transverse rugae (Fig. 26); fore wing moderately infuscated apically (Fig. 24); vein 3-SR+SR1 approx. 4 times as long as vein r; hind femur slightly widened subapically (Fig. 23), partly smooth and shiny ventrally, apically yellowish brown; hind tarsus (except largely ivory basitarsus) dark brown (Fig. 23); hind coxa largely coarsely transversely striate (Fig. 25); length of first metasomal tergite approx. 3.7 times its apical width, tergite strongly shiny; second epipleuron of metasoma without dark spot; apices of first and third metasomal tergites brownish yellow; second metasomal suture curved and medial area behind it convex; length of ovipositor sheath approx. 0.5 times as long as fore wing and somewhat longer than metasoma; length of fore wing 6-7 mm.

Description.

Holotype, ♀. Body length 6.8 mm, fore wing length 6.4 mm, ovipositor sheath 3.1 mm.

Head. Antenna with 58 segments and 1.7 times as long as fore wing; third, fourth and penultimate antennal segments 3.8, 2.4 and 2.1 times as long as wide, respectively, and third segment 1.6 times as long as fourth segment; width of face 0.9 times height of face and clypeus combined (Fig. 31); maxillary palp 1.6 times as long as height of head; clypeus convex dorsally and flattened ventrally, remotely finely punctate (Fig. 31); malar space as long as basal width of mandible; distance between large tentorial pits twice as long as distance between pit and eye margin; in anterior view length of eye 2.3 times as long as wide; in dorsal view length of eye 3.6 times as long as temple and temple directly narrowed behind eye; POL:OD:OOL = 8:10:21; distance between anterior and lateral ocellus 0.6 times OD (Fig. 32); face moderately convex, remotely punctulate, and with long setae; frons laterally and vertex remotely finely punctate (interspaces much wider than punctures), interspaces smooth and area directly behind stemmaticum depressed; frons medially smooth; stemmaticum strongly protruding; temple with satin sheen and mainly granulate, dorsally with some rugulae; occipital flange wide lamelliform.

Mesosoma. Length of mesosoma 1.3 times as long as high; pronotal side shiny and largely smooth except some superficial granulation ventrally and rather coarsely crenulate medial sulcus, subposteriorly absent and posteriorly narrowly crenulate; prepectal carina angulate and medium-sized; mesopleuron angulate ventrally; precoxal sulcus narrow and finely crenulate, complete and with wide flange posteriorly (Fig. 25), meso- and metapleuron remotely finely punctate, smooth interspaces much wider than punctures; notauli narrow and finely crenulate; mesoscutum finely punctate, with smooth interspaces much wider than width of punctures; scutellar sulcus smooth; scutellum remotely punctulate; propodeum shiny, mainly smooth but medially with some coarse rugae.

Wings. Fore wing (Fig. 24): pterostigma 4.4 times as long as wide; second submarginal cell petiolate; r:2-SR:3-SR+SR1:r-m = 10:12:39:6; r issued behind middle from pterostigma; r-m submedially distinctly sclerotized; cu-a slightly postfurcal (Fig. 25); basal 0.7 of CU1a more or less sclerotized; CU1b: 3-CU1 = 1:2; CU1b short. Hind wing: M+CU:1-M: 1r-m = 21:92:10.

Legs. Hind coxa with coarse curved rugae dorsally and shiny (Fig. 25); ventrally hind femur shiny and remotely finely punctate, long setose; length of femur, tibia and basitarsus of middle leg 7.4, 12.5 and 11.9 times as long as their width, respectively; inner and outer middle tibial spurs 0.50 and 0.35 times as long as basitarsus; length of femur, tibia and basitarsus of hind leg 5.3, 10.4 and 7.0 times their width, respectively; hind basitarsus rather erect setose; inner and outer hind tibial spurs 0.55 and 0.40 times as long as basitarsus, respectively.

Metasoma. First tergite distinctly narrowed behind spiracles (Fig. 27), 3.6 times as long as its apical width, its surface superficially finely granulate subapically and shiny; second tergite convex and smooth anteriorly, remainder smooth and shiny, 1.6 times longer than its basal width; second suture curved and medial area behind it convex; ovipositor sheath 0.49 times as long as fore wing and 0.9 times as long as metasoma (Fig. 23).

Colour. Yellowish brown; inner half of humeral plate yellowish brown, remainder of plate and tegulum brownish yellow; outer side of scapus and pedicellus, stemmaticum, pterostigma, hind tibial spurs, apex of hind basitarsus and base of second hind tarsal segment brown; apical half of antenna, remainder of hind tarsus, fore and middle telotarsi, fourth middle tarsal segment, apical 0.2 of hind tibia and ovipositor sheath dark brown; frons, face, clypeus, palpi, scapus and pedicellus ventrally, remainder of fore and middle legs, meso- and metasoma laterally and ventrally pale yellowish; apex of fore wing darkened and remainder subhyaline (Fig. 24); veins dark brown.

Male. Very similar to holotype; body length 6.6-6.8 mm, fore wing length 5.9-6.0 mm; antenna with 54(1), 56(1) segments and 1.9 times longer than fore wing; propodeum largely smooth and transverse rugae weakly or coarsely developed, length of first metasomal tergite 3.5-3.8 times its apical width; pterostigma and apical 0.3 of hind tibia dark brown.

Variation.

Female: length of body 6.2-6.8 mm and of fore wing 5.8-6.4 mm; antenna with 58(1), 57(2) segments; propodeum smooth and without distinct transverse rugae or with some weak or coarse rugae medially; vein cu-a of fore wing antefurcal or narrowly postfurcal; length of first tergite 3.2-3.6 times its apical width; length of ovipositor sheath 0.49-0.54 times fore wing.

Distribution.

Vietnam (Phu Tho (Viet Tri); Ninh Binh (Cuc Phuong); Ha Tinh (Vu Quang)).

Etymology.

Named after Dr Dicky Sick Ki Yu (Nepean, Canada) for creating Taxapad, the excellent and enormous database on parasitoid Hymenoptera . Nowadays, it is hardly imaginable to study successfully Braconidae without the help of this database.