Dacnusa (Aphanta) sasakawai Takada, 1977

Zheng, Min-Lin & Chen, Jia-Hua, 2017, A new species and three newly recorded species of the dacnusine genus Dacnusa Haliday (Hymenoptera: Braconidae: Alysiinae) from China, Zootaxa 4232 (4), pp. 511-522 : 512-514

Dacnusa (Aphanta) sasakawai Takada, 1977

(Fig. A)

Dacnusa sasakawai Takada, 1977 , 11: 2–5; Fischer, 1994, 26(1): 249; Belokobylskij et al., 2003, 53(2): 361. Dacnusa (Aphanta) distracta Tobias, 1986 . (Syn. by Tobias, 1998)

Dacnusa (Aphanta) sasakawai: Tobias, 1998: 324 ; Ku et al., 1998, 37(2): 111; Perepechayenko, 2000, 8(1): 57; Papp, 2004, 50(3):257, 2005, 51(3): 229, 2007, 53(1): 10.

Material examined. 1 male, Yangling, Shanxi Province, China, 10.v.2008, coll. Qiong Zhao ; 1 female, Xifeng Mountain , Tangyu, Shanxi Province, China, 14.v.2008, coll. Qiong Zhao ; 3 females, Lanzhou Botanical Garden , Gansu Province, China, 26.vi.2008, coll. Qiong Zhao ; 3 females, Shihezi , Xinjiang Province, China, 17.vii.2008, coll. Qiong Zhao ; 2 females, National Forest Park , Mudanjiang Heilongjiang Province, China, 17.vii.2011, coll. Minlin Zheng ; 1 female and 1 male, Mohe Heilongjiang Province, China, 23.vii.2011, coll. Xiaohui Dong ; 1 female and 2 males, Baicheng Forest Park , Jilin Province, China, 2.viii.2011, coll. Minlin Zheng ; 2 females, Tongyu , Jilin Province, China, 15.viii.2011, coll. Yingying Zhao ; 1 female, Changchun Park , Jilin Province, China, 28.viii.2011, coll. Yingying Zhao ; 6 females and 5 males, Wusutu , Hohhot, Inner Mongolia, China, 8.viii.2011, coll. Minlin Zheng, Junli Yao, Xiaohui Dong and Yingying Zhao ; 2 females, Lishan Natural Reserve , Jincheng, Shanxi Province, China, 15.ix.2011, coll. Junli Yao ; 1 female, Huanren , Benxi, Liaoning Province, China, 17.vii.2012, coll. Chunguang Chang ; 1 female, Haitangshan Natural Reserve , Liaoning Province, China, 24.vii.2012, coll. Chunguang Chang ; 1 female, Sanyiba Park , Fuxin, Liaoning Province, China, 26.vii.2012, coll. Yingying Zhao .

Description. Female. Body 1.7 mm long.

Head. Antenna with 21 flagellomeres, first flagellomere 1.2 and 1.3 times as long as second and third flagellomere, respectively, first and penultimate flagellomeres 4.5 and 2.0 times as long as wide, respectively; head 1.8 times as broad as long in dorsal view; eye 1.4 times as long as temple; OOL: OD: POL=26:5:12; face (Fig. A1) rather promoted medially, punctuate and densely setose nearly all over; mandible (Fig. A3) with 3 teeth, first and third tooth obtuse, second tooth subtriangular, with its tip pointed, and somewhat longer than others.

Mesosoma. Mesosoma 1.3 times as long as wide; sides of pronotum smooth and glabrous; mesoscutum mainly smooth, with its front side and middle lobe densely pubescent, lateral lobes nearly glabrous (Fig. A6); notauli extend to the middle part of mesoscutum; medio-posterior depression of mesoscutum deep, about 0.3 times as long as mesoscutum; mesopleuron mostly smooth and glabrous; precoxal sulcus deep and long, distinctly crenulate (Fig. A9); propodeum densely pubescent except middle area of its posterior part glabrous, and pubescence forming a rosette around its two spiracles; metapleuron rough and with dense long pubescence directed towards the hind coxa (Fig. A9).

Wings. Vein 1-SR+M of fore wing absent; pterostigma 5.2 times as long as wide, 1.4 times as long as vein 1- R1; vein 3-SR-SR1 more or less curved on its hind half; vein 3-CU1 and CU1b distinctly thickened, broader than vein m-cu (Fig. A7).

Legs. Hind femur 4.5 times as long as broad distally; hind tibia almost as long as hind tarsus.

Metasoma. First tergite (Fig. A10) 1.8 times as long as broad behind, evenly and posteriorly widened before spiracles and parallel-sided beyond spiracles, hairless, longitudinally and finely striate; tergites beyond the first one polished; ovipositor sheath thin, 0.8 time as long as hind basitarsus.

Colour. Head mainly dark brown; antenna dark brown except ventral part of scapus and pedicellus yellow; mandible yellow except teeth reddish-brown; labrum, maxillary palp, and labial palp yellow; clypeus brownishyellow. Mesosoma black; pterostigma of fore wing brown; legs yellow except telotarsus brown. First tergite yellow; remaining tergites of metasoma brown.

FIGURE A (1–11). Dacnusa (Aphanta) sasakawai Takada , rec. nov., ♀, 1. head (frontal view); 2. head (dorsal view); 3. mandible; 4. antenna (terminal five flagellomeres); 5. antenna (scapus, pedicellus, 1st–3rd flagellomeres); 6. mesosoma (dorsal aspect); 7. fore wing (female); 8. fore wing (male); 9. mesosoma (lateral aspect); 10. propodeum and first tergite (dorsal aspect) FIGURE A. (Continued)

Variation. Body length 1.3–2.0 mm, antenna with 19–22 flagellomeres, major colour of body reddish-brown to black.

Male. Similar to female but pterostigma of fore wing distinctly wider and darker (Fig. A8). Body length 1.3– 1.7 mm, antenna with 19–21 flagellomeres.

Biology: Only known as endoparasitoids of three species in Agromyzidae : Phytomyza horticola Goureau , Chromatomyia horticola (Goureau) and Liriomyza bryoniae (Kaltenbach) ( Takada 1977, Yu et al. 2012).

Distribution. China (Palaearctic, first record), Germany, Hungary, Italy, Japan, Korea, Mongolia, Russia.

Remarks. The absence of fore wing vein 1-SR+M is the unique feature of Aphanta -related species in Dacnusa . The Förster (1862) established genus Aphanta with type species Aphanta hospita . Griffiths (1964) placed the only species of Aphanta in Dacnusa . Takada (1977) described the second Aphanta -related species Dacnusa sasakawai , and Tobias (1986) described Aphanta as a subgenus of Dacnusa with two valid species. Papp (2004) described a third Aphanta -related species, Dacnusa (Aphanta) kaszabi .