Gonatocerus (Lymaenon) bicoloriventris Zeya, 1995

Triapitsyn, Serguei V., 2013, Review of Gonatocerus (Hymenoptera: Mymaridae) in the Palaearctic region, with notes on extralimital distributions, Zootaxa 3644 (1), pp. 1-178 : 60-61

Gonatocerus (Lymaenon) bicoloriventris Zeya, 1995

( Figs 88–90 )

Gonatocerus bicoloriventris Zeya in Zeya & Hayat, 1995: 96–97, 146 (illustrations). Holotype female [ BMNH] (not examined). Type locality: Srirangapatna (or Srirangapattana) [spelled as Srirangapatnum in the original description] (near Mysore), Mandya District, Karnataka, India.

Gonatocerus bicoloriventris Zeya: Hayat et al. 2011 : 8 (holotype depository); Manickavasagam & Rameshkumar 2011: 64 (distribution); Anwar & Zeya 2012: 52 (distribution in India).

Material examined. CHINA. BEIJING: Beijing (Haidian District), Fragrant Hills Park (Xiangshan Park), 23– 24.vii. 2002, M.L. Buffington [1 Ƥ, UCRC]. Mentougou District: Liyan Ling (Linshan Mts.), 40 °00.279’N 115 ° 30.753 ’E, 1749 m, 2.viii. 2002, G. Melika [1 Ƥ, UCRC]. Xiaolongmen Station, 39 ° 59.220 ’N 115 ° 31.479 ’E, 1095 m, 28.vii. 2002, G. Melika [10 Ƥ, CNCI (1), UCRC (8), ZIN (1)].

Extralimital records. INDIA. KARNATAKA, Mudigere, 13 °07’09’’N 75 ° 37 ’ 41 ’’E, 994 m, 26.xi. 2003, J.M. Heraty [1 Ƥ, UCRC]. [NATIONAL CAPITAL TERRITORY OF] DELHI, New Delhi, Indian Agricultural Research Institute, 28 ° 37 ’ 51 ’’N 77 °09’ 50 ’’E, 220 m, 5.xi. 2003, J.M. Heraty [1 Ƥ, UCRC]. PAKISTAN. PUNJAB, Faisalabad, University of Agriculture Faisalabad, Horticulture Fruit Garden, 31 ° 25.844 ’N 73 °03.665’E, 184 m, 15–26.iii. 2011, M.S. Hoddle, citrus orchard [1 Ƥ, UCRC].

Distribution. PALAEARCTIC*: China *. ORIENTAL: India ( Zeya & Hayat 1995), and Pakistan *.

Redescription. FEMALE (specimens from China). Body length 880–980 µm (slide-mounted specimens). Head and mesosoma brown to dark brown, gaster and appendages mostly brown except base of gaster, scape, pedicel, and tarsi light brown.

Antenna ( Fig. 88 ) with radicle 0.33–0.35 × total length of scape, rest of scape 2.8–3.3 × as long as wide, faintly scuptured; pedicel much longer than F 1; F 1 –F 4 short, subequal in length (F 2 the shortest funicle segment) and a little shorter than F 5 or F 6, F 1 –F 6 notably shorter than F 7 or F 8, F 7 the longest and F 8 the broadest among funicle segments; mps on F 7 (2) and F 8 (2); clava normally with 9 mps but sometimes possibly with only 8 mps, 2.7–3.5 × as long as wide, from slightly shorter to slightly longer than combined length of F 6 –F 8.

Mesosoma ( Fig. 89 ). Propodeum with submedian lines moderately apart from each other. Fore wing ( Fig. 90 ) 3.0– 3.2 × as long as wide; hypochaeta notably closer to distal macrochaeta than to proximal macrochaeta; longest marginal seta 0.35–0.4 × maximum wing width; disc with a slight brownish tinge, bare behind submarginal vein, with a large, distinct bare area between marginal vein and cubital row of setae, and setose elsewhere. Hind wing ( Fig. 90 ) 16–18 × as long as wide; disc unevenly setose and with a slight brownish tinge; longest marginal seta 2.3–2.8 × maximum wing width.

Metasoma ( Fig. 89 ). Gaster longer than mesosoma. Petiole 1.7 –2.0× as wide as long. Ovipositor occupying 0.7–0.8 × length of gaster, not or just slightly exserted beyond its apex (by at most 0.07 × own length); ovipositor length: mesotibia length ratio 1.5–1.7: 1.

MALE. Unknown.

Diagnosis. Gonatocerus bicoloriventris is similar to the western Palaearctic species G. thyrides (Debauche) , from which it differs by the relatively shorter F 1 –F 6 of the female antenna ( Fig. 88 ), and also in having normally 9 mps on the clava (sometimes possibly only 8), whereas in G. thyrides the clava bears 10 mps.

Hosts. Unknown.

Comments. Zeya & Hayat (1995) counted only 6 mps on the female clava; however, in the slide-mounted female specimen from Mudigere that I examined the number of mps on the clava is clearly 9 as in the specimens from China. According to the original description,, the fore wing in the type series is at most 3 × as long as wide (longest marginal seta 0.24–0.28 × maximum wing width) whereas in the examined specimens from China the fore wing is at least 3.0× as long as wide (longest marginal seta 0.35–0.4 × maximum wing width). I regard such minor differences as intraspecific variation, also because the longest marginal seta is 0.32 × maximum wing width in the non-type specimen of G. bicoloriventris from Mudigere. Also, in the specimen from Pakistan the ovipositor length: mesotibia length ratio is 1.9: 1.

Figures

FIGURES 88 – 90. Gonatocerus (Lymaenon) bicoloriventris Ƥ (Xiaolongmen Station, Beijing, China): 88, antenna; 89, body; 90, wings.