Gonatocerus (Lymaenon) karlik 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 : 67-68

Gonatocerus (Lymaenon) karlik Triapitsyn , sp. n.

( Figs 103–105 )

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 294199 ]. Paratypes: CHINA. BEIJING , Mentougou District: Liyan Ling ( Linshan Mts. ), 40°00.279’N 115°30.753’E, 1749 m, 2.viii.2002, G. Melika (sweeping alpine meadows) [3 Ƥ on slides, UCRC]. Same data as holotype [9 Ƥ on slides, CNCI (1), UCRC (7), ZIN (1)]. REPUBLIC OF KOREA. GYEONGGI-DO, Suwon-si, Seodun-dong, Seoul National University , 15.ix.2001, J.- W. Kim [1 Ƥ on slide, UCRC]. RUSSIA. STAVROPOL’SKIY KRAY: Achikulak , V.V. Kostjukov: 19.viii.2002 [2 Ƥ, 1 3 on slides, UCRC]; 18.viii.2003 [4 Ƥ, 4 3 on points, UCRC (2 Ƥ, 2 3), ZIN (2 Ƥ, 2 3)]. Prietokskiy , V.V. Kostjukov: 7.ix.2002 [1 Ƥ on slide, UCRC]; 13.vii.2003 [2 Ƥ on points, UCRC, ZIN, and 1 Ƥ on slide, UCRC].

Description. FEMALE. Body length 450–650 µm (point-mounted specimens) or 600–800 µm (slidemounted specimens). Head and mesosoma brown to dark brown, gaster and appendages mostly brown except base of gaster a little lighter (light brown).

Antenna ( Fig. 103 ) with radicle 0.3–0.36× total length of scape, rest of scape 2.9–3.3× as long as wide, faintly sculptured; pedicel longer than F1; F1–F4 subequal in length and a little shorter than following funicle segments, F8 the longest and broadest funicle segment and incised apically; mps on F7 (usually 0, occasionally 1 on one or both antennae) and F8 (2); clava with 7 or 8 mps, 3.1–3.7× as long as wide, longer than combined length of F6–F8 (sometimes about as long as combined length of F5–F8).

Mesosoma ( Fig. 104 ). Propodeum with submedian lines rather close to each other anteriorly but very wide posteriorly. Fore wing ( Fig. 105 ) 3.1–3.8× as long as wide; longest marginal seta 0.51–0.58× maximum wing width; disc with a slight brownish tinge, mostly bare behind submarginal vein except for a few setae behind its apex and setose elsewhere. Hind wing ( Fig. 105 ) 22–24× as long as wide; disc about as wide as or a little wider subapically than just beyond hamuli, setose, and with a slight brownish tinge; longest marginal seta 3.6–4.2× maximum wing width.

Metasoma ( Fig. 104 ). Gaster longer than mesosoma. Petiole 1.4–1.8× as wide as long. Ovipositor occupying 0.6–0.7× length of gaster, not exserted beyond its apex; ovipositor length: mesotibia length ratio 1.3–1.4:1.

Measurements (µm) of the holotype. Body 787; mesosoma 277; petiole 18; gaster 356; ovipositor 242. Antenna: radicle 43; rest of scape 98; pedicel 48; F1 18; F2 18; F3 21; F4 22; F5 30; F6 32; F7 32; F8 37; clava 129. Fore wing 633:183; longest marginal seta 94. Hind wing 500:22; longest marginal seta 79.

MALE. Body length (dry-mounted paratypes) 450–650 µm. Similar to female except for normal sexually dimorphic features and the longest marginal seta about 0.64× maximum wing width (in only one slide-mounted specimen measured).

Diagnosis. Gonatocerus karlik is very similar to G. kazak , from which it differs by usually lacking mps on F7 of the female antenna, the relatively shorter F1–F4 ( Fig. 103 ), and especially by the consistently relatively longer marginal setae on the fore wing (the longest such seta is at least 0.5× the maximum wing width). In G. kazak F7 always bears 1 or 2 mps, F1–F4 are relatively longer ( Fig. 113 ), and the marginal setae on the fore wing are consistently relatively shorter (the longest such seta is at most 0.34× the maximum wing width). Gonatocerus karlik differs from that of the similarly looking Nearctic species G. (Lymaenon) pygmaeus Girault in having F3 subequal in length to F1, F2, and F4, and also in lacking a distinct bare area on the fore wing disc behind the marginal vein anterior to the cubital row of setae, whereas in the latter F3 is longer than F1, F2, or F4, and the fore wing disc has a distinct bare area behind the marginal vein anterior to the cubital row of setae.

Etymology. The name (a noun in apposition) stands for a dwarf in Russian; the species is named so because of its relatively minute size.

Hosts. Unknown.

Figures

FIGURES 103 – 105. Gonatocerus (Lymaenon) karlik Ƥ (holotype): 103, antenna; 104, body; 105, wings.

FIGURES 113 – 115. Gonatocerus (Lymaenon) kazak Ƥ (113, 114 — holotype; 115 — paratype): 113, antenna; 114, body; 115, wings.