Deuterixys jilinensis Zheng & Song, 2020

Zheng, Minlin & Song, Dongbao, 2020, A review of Deuterixys Mason from China, with description of three new species (Hymenoptera, Braconidae, Microgastrinae), Zootaxa 4728 (4), pp. 489-497 : 490-492

Deuterixys jilinensis Zheng & Song , sp. nov.

Figure 1 (A–H)

Type material. Holotype: ♀, Tonghua, Mt. Changbaishan, Jilin, 1989.viii.4, Yang Jianquan . Paratype: 2♀♀, same data as holotype ; 2♀♀, Tonghua, Mt. Changbaishan, Jilin, 1989.viii.4, Zhou Xiaohua ; 1♀, Jian, Mt. Changbaishan, Jilin, 1989.viii.5, Zhou Xiaohua . 1♂, Tonghua, Mt. Changbaishan, Jilin, 1989.viii.4, Zhou Xiaohua ; 1♂, Donggang, Mt. Changbaishan, Jilin, 1989.vii.26, Zhou Xiaohua .

Description. Female. Body length 1.8–2.0 mm, fore wing length 2.0– 2.2 mm.

Head. Transverse in dorsal view, 2.0 × as wide as long and 1.1 × as that of mesoscutum. Ocelli small in a high triangle, imaginary tangent of posterior margin of anterior ocellus distant from posterior ocelli, POL: OD: OOL= 7: 3: 8. Frons and vertex shiny, scattered with sparsely small punctate and fine setae; vertex narrowed behind eyes, area behind ocellar area smooth and shiny, without setae; temple and gena weakly punctate and shiny, with dense setae; occiput deep concave. Orbicular-ovate in anterior view, with antennal sockets high above middle level of eyes; face slightly convex, finely punctulate associated with long pilosity; inner margin of eyes moderately constricted downward; eyes pilose. Antenna longer than body (5: 4); flagellomeres thin, with bristly setosity, most flagellomeres with placodes arranged regularly in 2 ranks except for last 5 or 6 flagellomeres. Flagellomere proportion: 2 L/W = 2.9, 8 L/W = 2.4, 14 L/W = 1.4. L 2/14 = 2.1, W 2/14 = 1.2. F12-15 tightly connected.

Mesosoma. Mesoscutum with spherical bulge and densely and evenly punctate and setose; notauli hardly impressed. Disc of scutellum densely punctate, covered with dense setae; scutellar sulcus deep with a few carinae. Propodeum highly polished, bearing a high, narrow, median carina and a pair of weaker longitudinal carinae running forward from the apical corners.

Wings. Fore wing without areolet, vein r almost vertically emitted from middle of pterostigma; r and 2-SR meeting at a 155~160° angle; 2-SR: r: width of pterostigma = 9: 8: 9; vein 1-R1 1.33–1.4 × as long as pterostigma and 4.5 × distance from the apex of 1-R1 to apex of marginal cell, pterostigma 2.3 × as long as wide. 1-CU1: 2-CU1: m-cu= 9: 11: 9. Hind wing narrow, vein cu-a incurved.

Legs. Hind coxa small, slightly longer than T1, shiny, scattered with short setae. Hind tibia 0.93–0.97 × as long as hind tarsus; inner hind tibial spurs almost as long as outer one, about 0.4 × as long as hind basitarsus.

Metasoma. T1 2.3–2.5 × as long as wide, almost parallel on both sides but weakly constricted at middle and apical, basal half bearing a medial longitudinal groove, apical half arch, with a small smooth bump at middle apex. T2 + T3 broad, rectangular and obviously wider than T1 (8: 5), slightly constricted before the suture between T2 + T3, T2 0.6 × as long as its basal width and 1.4 × as long as T3 (13: 9), the median field of T2 not obvious. T2 + T3 and most T1 almost completely covered with finely-textured and dense aciculo-rimulose sculpture. Tergites posterior to T3 more membranous, shiny. All tergites with sparsely scattered setae. Ovipositor short and bending downward, ovipositor sheath 0.4 × as long as hind basitarsus, hairy only on the apical half. Hypopygium short, strongly and evenly sclerotized.

Colour. Body mostly blackish. Seta on mesoscutum and disc of scutellum golden yellow. Antenna brown; maxillary palp, labial palp and legs yellow, except hind coxa yellowish-brown, apical half of hind tibia and most of hind tarsus light reddish-brown, apical metasoma brown, basal metasoma light yellow (except for tergites). Pterostigma brown or yellowish-brown and semitransparent.

Male. Body mostly fusco-testaceous, and the colour of rest of body deeper than that of female.

Host. Unknown.

Etymology. The species name is derived from the collecting place: Jilin province of China.

Distribution. China (Jilin).

Remarks. This species is similar to D. shennongensis , sp. nov. by body colour mostly blackish (vs. body colour mostly fusco-testaceous); fore wing with vein 1-R1 4.5 × distance from the apex of 1-R1 to apex of marginal cell (vs. fore wing with vein 1-R1 5.1 × distance from the apex of 1-R1 to apex of marginal cell); inner hind tibial spurs almost as long as outer one, about 0.4 × as long as hind basitarsus (vs. inner hind tibial spurs almost as long as outer one, about 0.3 × as long as hind basitarsus).

Figures

FIGURE 1. Deuterixys jilinensis Zheng & Song, sp. nov. A. habitus, lateral aspect; B. head, frontal aspect; C. head, dorsal aspect; D. antenna; E. mesoscutum, dorsal aspect; F. wings; G. propodeum and metasomal T1-T3, dorsal aspect; H. ovipositor sheath, lateral aspect.