Gonatocerus (Lymaenon) svat Triapitsyn

Triapitsyn, Serguei V., 2013, Review of Gonatocerus (Hymenoptera: Mymaridae) in the Palaearctic region, with notes on extralimital distributions, Zootaxa 3644 (1), pp. 1-178 : 107-109

Gonatocerus (Lymaenon) svat Triapitsyn , sp. n.

( Figs 180–184 )

Type material. Holotype female [ UCRC] on slide: CHINA. BEIJING , Mentougou District, Xiaolongmen Station , 39°59.220’N 115°31.479’E, 1095 m, 28.vii.2002, G. Melika [ UCRC ENT 294200 ].

Description. FEMALE. Head and mesosoma brown to dark brown, gaster mostly brown except yellow to light brown basally; scape, pedicel, and F1 light brown, rest of flagellum brown; legs light brown to brown.

Head a little wider than mesosoma; subantennal sulci line-like, wide apart; upper face with peculiar crescent-shape sculpture ( Fig. 180 ). Antenna ( Fig. 181 ) with radicle 0.28× total length of scape, rest of scape 3.8× as long as wide, almost smooth; pedicel much longer than F1; F1 the shortest funicle segment, F2 and F3 a little shorter than following funicle segments, F4–F8 more or less subequal in length (F5 or F7 the longest); mps on F7 (1) and F8 (2); clava apparently with 8 mps, about 3.8× as long as wide, slightly shorter than combined length of F6–F8.

Mesosoma ( Fig. 182 ). Midlobe of mesoscutum with conspicuous sculpture, side lobes of mesoscutum and scutellum with weak sculpture. Propodeum with submedian lines wide apart. Fore wing ( Fig. 183 ) narrow, about 4.5× as long as wide; longest marginal seta 0.55× maximum wing width; disc with a slight brownish tinge, with a few setae behind apex of submarginal vein and densely setose elsewhere except setae sparse between apex of marginal vein and cubital row of setae leaving a very small bare area. Hind wing ( Fig. 184 ) about 32× as long as wide; disc unevenly setose and with a slight brownish tinge; longest marginal seta about 4.8× maximum wing width.

Metasoma ( Fig. 182 ) longer than mesosoma. Petiole 2.2× as wide as long. Ovipositor occupying entire length of gaster, projecting anteriorly under petiole and extending to posterior margin of anterior scutellum and exserted posteriorly beyond gastral apex by about 0.12× own length; ovipositor length: mesotibia length ratio about 3.4:1.

Measurements (µm). Body total length 1002; mesosoma 351; petiole 18; gaster 486; ovipositor 800. Antenna: radicle 45; rest of scape 115; pedicel 49; F1 25; F2 34; F3 36; F4 42; F5 42 (45); F6 42; F7 45 (43); F8 43; clava 131. Fore wing 836:187; longest marginal seta 103. Hind wing 664:21; longest marginal seta 100.

MALE. Unknown.

Diagnosis. Gonatocerus svat is unique among the Palaearctic species of the subgenus in having the ovipositor projecting anteriorly under the mesosoma and extending to the posterior margin of anterior scutellum ( Fig. 182 ).

Etymology. The species name (a noun in apposition) stands for a father of one’s son-in-law or daughterin-law in Russian.

Hosts. Unknown.

Figures

FIGURES 180, 181. Gonatocerus (Lymaenon) svat Ƥ (holotype): 180, head; 181, antenna.

FIGURES 182 – 184. Gonatocerus (Lymaenon) svat Ƥ (holotype): 182, body; 183, fore wing; 184, hind wing.