Gonatocerus (Gahanopsis) arkadak Triapitsyn

Triapitsyn, Serguei V., Huber, John T., Logarzo, Guillermo A., Berezovskiy, Vladimir V. & Aquino, Daniel A., 2010, Review of Gonatocerus (Hymenoptera: Mymaridae) in the Neotropical region, with description of eleven new species, Zootaxa 2456, pp. 1-243 : 87-88

Gonatocerus (Gahanopsis) arkadak Triapitsyn , sp. n.

( Figs 158–161 )

Type material. Holotype female [ UCRC ENT 162769 ] on slide labeled: 1. “ COLOMBIA: Amazonas, PNN [Parque Nacional Natural] Amacayacu, Matamata , 3°41’S, 70°15’W, 150 m (M. 847), 4.viii–11.ix.2000, A. Parente, MT”; 2. “ Gahanopsis Det. J. T. Huber 2001 ”. The holotype is dissected under 4 coverslips, with the mesosoma and metasoma mounted dorsoventrally, and lacking one hind wing and most of one middle leg . Paratype: ECUADOR. SUCUMBÍOS, Napo River , Sacha Lodge , 0°30’S 76°30’W, 270 m, 20–30.ix.1994, P. Hibbs [1 ♀ on card, CNCI] .

Description. FEMALE (holotype). Body mostly brownish except face and scutellum yellowish to light brown; scape and pedicel light brown, flagellum brownish; legs light brown.

Antenna ( Fig. 158 ) with radicle about 0.2x total length of scape, remainder of scape about 3.0x as long as wide; pedicel much longer than F1; funicle 7-segmented; F1, F3, and F5 much shorter (F1 the shortest) than remaining funicle segments and without mps; F2, F4, F6, and F7 subequal, mps on F2 (2), F4 (3), F6 (3), and F7 (4); clava 2.9x as long as wide, with 8 mps, almost as long as combined length of F6 and F7.

Mesosoma ( Fig. 159 ). Mesoscutum, scutellum, and axillae finely sculptured; propodeum ( Fig. 160 ) short, smooth. Forewing ( Fig. 161 ) 3.2x as long as wide; longest marginal seta about 0.25x maximum wing width; forewing disc with a rather strong brownish tinge throughout except just behind submarginal vein, bare behind submarginal vein and densely setose elsewhere including behind marginal vein; macrochaetae on submarginal and marginal veins very strong. Hind wing ( Fig. 161 ) about 13x as long as wide; longest marginal seta about 1.9x maximum wing width; disc with a brownish tinge and densely setose throughout except just behind apex of venation. Metafemur about 2.1x as long as wide.

Gaster much longer than mesosoma ( Fig. 159 ); petiole very short, strap-like, inconspicuous, ovipositor long, 3.3x as long as mesotibia, projecting strongly forward under mesosoma (extending to mouthparts in the dry specimen and almost to base of propleura in the same slide-mounted specimen) and slightly exserted beyond apex of gaster by about 0.07x own length.

Measurements (µm) of the holotype. Total body length (of the dry specimen before slide-mounting): 693; head: 100; mesosoma 276; gaster 455; ovipositor 732. Antenna: radicle 18; rest of scape 81; pedicel 45; F1 17; F2 50; F3 21; F4 51; F5 24; F6 51; F7 49; clava 97. Forewing 707:221; longest marginal seta 58. Hind wing 646:48; longest marginal seta 89.

MALE. Unknown.

Diagnosis. Gonatocerus (Gahanopsis) arkadak sp. n. is characterized by the following unique combination: female antenna ( Fig. 158 ) with funicle 7-segmented; F1, F3, and F5 much shorter than other funicle segments and without mps; F2, F4, F6, and F7 subequal and with mps.

Gonatocerus (Gahanopsis) deficiens (Ogloblin) is the only other known species of the subgenus to have a 7-segmented female funicle, but F2–F7 are more or less subequal in length and each has mps ( Fig. 163 ).

Etymology. The species name (a noun in apposition) refers to the town of Arkadak in Saratovskaya oblast`, Russia, the original, home town of part of the family of the author of this species.

Hosts. Unknown.

Figures

FIGURES 158 – 161. Gonatocerus (Gahanopsis) arkadak ♀ (holotype): 158, antenna; 159, mesosoma and metasoma; 160, dorsellum and propodeum; 161, wings.

FIGURES 162, 163. Gonatocerus (Gahanopsis) deficiens ♀ (162 – holotype; 163 – paratype): 162, habitus; 163, antennae, head, and mesosoma.