Deuterixys jilinensis Zheng & Song 2020, sp. nov.

Abstract

<i>Deuterixys jilinensis</i> Zheng & Song, sp. nov. <p>Figure 1 (A–H)</p> <p>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.</p> <p>Description. Female. Body length 1.8–2.0 mm, fore wing length 2.0– 2.2 mm.</p> <p>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.</p> <p>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.</p> <p>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.</p> <p>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.</p> <p>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.</p> <p>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.</p> <p>Male. Body mostly fusco-testaceous, and the colour of rest of body deeper than that of female.</p> <p>Host. Unknown.</p> <p>Etymology. The species name is derived from the collecting place: Jilin province of China.</p> <p>Distribution. China (Jilin).</p> <p> Remarks. This species is similar to <i>D. shennongensis</i>, 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).</p>Published as part of <i>Zheng, Minlin & Song, Dongbao, 2020, A review of Deuterixys Mason from China, with description of three new species (Hymenoptera, Braconidae, Microgastrinae), pp. 489-497 in Zootaxa 4728 (4)</i> on pages 490-492, DOI: 10.11646/zootaxa.4728.4.8, <a href="http://zenodo.org/record/3626644">http://zenodo.org/record/3626644</a&gt