Arescon sparsiciliatus Jin & Li

Jin, Xiang-Xiang, Li, Cheng-De & Yang, Jian-Chun, 2016, Description of three new species of Arescon Walker (Hymenoptera, Mymaridae) from China, ZooKeys 584, pp. 83-94 : 89-91

Taxon classification Animalia Hymenoptera Mymaridae

Arescon sparsiciliatus Jin & Li sp. n. Figs 17-21, 22-27

Holotype.

♀ (NEFU) Yunnan Province, Ruili City, Mengxiu County, 26-27.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT.

Paratypes.

5 females, 2 males. Yunnan Province: Longchuan County, 26-27.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT (3♀♀ 1♂, NEFU); Puer City, Lancang County, 19-20.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang, YPT (1♀, NEFU); Mengla County, Menglun Town, 13.II. 2014, Hui-Lin Han, Guo-Hao Zu, Zhong-Ping Xiong, sweeping (1♀ 1♂, NEFU).

Diagnosis.

Antenna (Fig. 17) of female with fl2-fl5 almost subequal in length; clava 2.67 –3.29× as long as wide, shorter than fl4 and fl5 combined; metanotum (Fig. 18) with dorsellum rhomboidal; propodeum shorter than scutellum; phragma with posterior margin narrowly rounded; fore wing (Fig. 19) 3.94 –4.10× as long as wide, with venation extending about 0.7 × length of wing; disc nearly asetose, only with a line along apical and posterior margins of wing, 1 or 2 irregular rows of setae near posterior margin and several scattered setae distally; ovipositor (Fig. 21) about 1.6 –1.9× as long as metatibia, distinctly exserted.

Description.

Female (holotype data in square brackets). Body length 640-700 [655]. Head dark yellowish brown with eyes, ocelli, and transverse trabecula black; mandible brown. Antenna except clava pale brown, clava brown. Mesosoma mostly yellow with middle part of pronotum, about anterior half of mesoscutum except laterally, a small spot on tegula, middle part of metanotum, and propodeum largely except anterior lateral corner, dark brown; anterior internal part of axilla and anterior scutellum pale brown to yellowish brown. Wings uniformly infuscate with venation brown. Legs pale brown with tips of apical tarsomere of all legs brown. Metasoma pale brown with tip of gaster brown.

Head. Vertex and face with faint reticulate sculpture.

Antenna. Antenna (Fig. 17) sparsely setose. Radicle 0.24-0.31 [0.31] × as long as scape; scape with faint longitudinal striations, 3.63-4.67 [4.42] × as long as wide; pedicel with faint longitudinal striations, 1.6-1.9 [1.6] × as long as wide, longer than fl1; all funicular segments much longer than wide, fl1 distinctly shortest, without mps; fl2-fl5 each with 2 mps; fl2 slightly shorter than fl3; fl3 about as long as fl4, slightly longer than fl5; clava 2.67-3.29 [2.76] × as long as wide, slightly longer than scape, shorter than fl4 and fl5 combined, with 7 mps. Measurements (length/width): radicle 24-29 [26], scape 84 –106/19– 28 [84/19], pedicel 38 –46/24– 26 [38/24], fl1 19-24/10 [24/10], fl2 50-77/17 [62/17], fl3 62-72/17 [65/17], fl4 65-74/17 [65/17], fl5 57-67/18 [60/18], clava 91 –110/29– 36 [91/33].

Mesosoma (Fig. 18). Mesoscutum longitudinally striate. Scutellum with faint reticulate sculpture distinctly shorter than mesoscutum (27: 45), with campaniform sensilla much nearer to lateral margins than to each other. Metanotum with dorsellum rhomboidal. Propodeum smooth, shorter than scutellum. Phragma with posterior margin narrowly rounded.

Wings. Fore wing (Fig. 19) length 535-560 [535], width 130-142 [135], length/width 3.94-4.10 [3.96], with venation extending 0.7 × length of wing; longest marginal setae 144-175 [175], 1.06-1.30 [1.30] × as long as greatest wing width. Discal setation very sparse, only with a line along distal and posterior margins of wing, 1 or 2 irregular rows along near posterior margin, about 5-8 setae scattered on the distal part of wing and sometimes 1-5 seta(e) near stigmal vein. Hind wing (Fig. 20) length 475-530 [475], width 19, length/width 25-28 [25], longest marginal setae 101-119 [119], 5.3-6.3 [6.3] × as long as greatest wing width.

Metasoma. Metasoma (Fig. 21) distinctly longer than mesosoma. Petiole transverse. Ovipositor (340-400 [355]) about 1.6-1.9 [1.8] × as long as metatibia (194-204 [203]), distinctly exserted.

Male. Body length 640. Antenna (Fig. 23). Measurements (length): scape 74, pedicel 36, fl1 48, fl2 62, fl3 60, fl4 58, fl5 58, fl6 55, fl7 55, fl8 53, fl9 53, fl8 50, fl9 48. Fore wing (Fig. 25) length 600, width 158, length/width 3.8, longest marginal setae 166, 1.05 × as long as greatest wing width. Hind wing (Fig. 26) length 550, width 19, length/width 29, longest marginal setae 110, 5.79 × as long as greatest wing width.

Comments.

Arescon sparsiciliatus sp. n. is similar to Arescon zenit in that fore wing venation extends almost 3/4 of the wing length and fl2-fl5 are almost subequal in length, but can be distinguished from Arescon zenit by the relatively more sparsely setose fore wing (more densely setose in Arescon zenit ); relatively wider fore wing, at most 4.1 × as long as wide (about 6.7 × as long as wide in Arescon zenit ); the longest marginal setae relatively shorter, at most 1.3 × greatest wing width (over 2 × greatest wing width in Arescon zenit ).