Gonatocerus (Lymaenon) kum Triapitsyn, sp. n.

Gonatocerus (Lymaenon) kum Triapitsyn, sp. n. (Figs 129–131) Type material. Holotype female [CAS] on slide: RUSSIA. SAKHALINSKAYA OBLAST’, Sakhalin Island (SE part), near Anna River mouth, 47 °09.90’N 143 °01.82’ E, 13.viii. 2001, D.J. Bennett. Description. FEMALE. Head dark brown, mesosoma mostly brown to dark brown except mesoscutum and scutellum partially light brown, gaster brown except light brown basally; scape and pedicel mostly light brown with some brown, flagellum brown, legs light brown. Antenna (Fig. 129) long, with radicle about 0.29 × total length of scape, rest of scape about 4.5 × as long as wide; pedicel longer than F 1; F 1 the shortest and F 5 the longest among funicle segments (all notably longer than wide), F 4 and F 6 a little shorter than F 5, F 8 the broadest funicle segment; mps on F 5 (1), F 6 (2), F 7 (2) and F 8 (2); clava with 10 mps, 3.4 × as long as wide, a little shorter than combined length of F 6 –F 8. Mesosoma (Fig. 130). Propodeum with submedian lines moderately close to each other. Fore wing (Fig. 131) 3.3 × as long as wide; longest marginal seta about 0.3 × maximum wing width; disc with a strong brownish tinge, mostly bare behind submarginal vein except for a few setae behind its apex and densely setose elsewhere. Hind wing (Fig. 131) narrow, 27 × as long as wide; disc unevenly setose and with a strong brownish tinge; longest marginal seta 3.7 × maximum wing width. Metasoma (Fig. 130). Gaster notably longer than mesosoma. Petiole 1.8 × as wide as long. Ovipositor occupying about 0.9 × length of gaster, exserted strongly beyond its apex (by 0.35 × own length); ovipositor length: mesotibia length ratio about 2.1: 1. External plate of ovipositor with 4 distal setae, faintly sculptured in apical half. Measurements (µm). Body (total length measured before slide-mounting) 1320; head (length measured before slide-mounting) 165; mesosoma 510; petiole 36; gaster 738; ovipositor 1045. Antenna: radicle 100; rest of scape 250; pedicel 81; F 1 52; F 2 87; F 3 99; F 4 112; F 5 115; F 6 109; F 7 97; F 8 85; clava 282. Fore wing 1648: 504; longest marginal seta 150. Hind wing 1212: 45; longest marginal seta 167. MALE. Unknown. Diagnosis. Gonatocerus kum is unique among Palaearctic species of the subgenus in having the ovipositor projecting beyond the apex of gaster by about 0.35 × own length (Fig. 130). It differs from G. novickyi, which also has a markedly exserted ovipositor (although by at most 0.22 × own length) in having a relatively wider (3.3 × as long as wide) fore wing (Fig. 131) (at least 4.2 × as long as wide in G. novickyi) and the ovipositor about 2.1 × as long as mesotibia (at least 2.6 × as long as mesotibia in G. novickyi). Gonatocerus kum differs from G. kusaka, which also has a strongly exserted ovipositor (although by at most 0.24 × own length), in having only 2 mps on F 8 (4 or 5 mps in G. kusaka). Etymology. The species name (a noun in apposition) stands for a godfather of one’s child in Russian. Hosts. Unknown.Published as part of Triapitsyn, Serguei V., 2013, Review of Gonatocerus (Hymenoptera: Mymaridae) in the Palaearctic region, with notes on extralimital distributions, pp. 1-178 in Zootaxa 3644 (1) on pages 79-80, DOI: 10.11646/zootaxa.3644.1.1, http://zenodo.org/record/24688