Gonatocerus (Cosmocomoidea) brachyurus (Ogloblin, 1938)

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 : 122-125

Gonatocerus (Cosmocomoidea) brachyurus (Ogloblin, 1938)

( Figs 228–233 )

Lymaenon brachyurus Ogloblin 1938b: 32 –35. Type locality: Tigre, Buenos Aires, Argentina. Gonatocerus (Gonatocerus) brachyurus (Ogloblin) : De Santis 1967: 103 (catalog). Gonatocerus brachyurus (Ogloblin) : Yoshimoto 1990: 39 (list); Luft Albarracin et al. 2009: 9 (list; distribution in Argen-

tina).

Lymaenon brachyurus Ogloblin : Loiácono et al. 2005: 13 (type information).

Type material examined. Holotype female [ MLPA] on slide labeled: 1. “ Lymaenon brachyurus A. O. ♀ Tigre 1937. A. O Typus.”; 2. ‘3853”; 3. [Red circle] “Holo-type”. The holotype, although insufficiently cleared, is in good condition, complete, perfectly spread out, and mounted dorsoventrally.

Material examined. ARGENTINA. BUENOS AIRES : Canal San Fernando, A.A. Ogloblin: 7.x.1945 [1 ♀, MLPA] ; 9.iii.1947 [1 ♀, MLPA]; x.1947 [2 ♀, MLPA]. José C. Paz, ii.1940, A.A. Ogloblin [4 ♀, MLPA]. Moreno, 34°08’57’’S 58°46’57’’W, 16.x.2005, C. Coviella [1 ♀, UCRC]. Near Ingeniero Otamendi, Río Paraná de las Palmas bank, 34°10’52.7’’S 58°52’12.8’’W, 6 m , 23.i.2003, S.V. Triapitsyn, M.C. Hernández [6 ♀, UCRC]. Tigre: 1937, A.A. Ogloblin [1 ♀, MLPA]; 11.ii.1945, A.A. Ogloblin [1 ♀, MLPA]; 34°23’50’’S 58°34’32’’W, 5 m, G.A. Logarzo: 2–9.xi.2005 [3 ♀, UCRC]; 9–16.xi.2005 [7 ♀, 1 ♂, UCRC]; 23–28.xi.2005 [17 ♀, UCRC]; 27.xii.2005 – 3.i.2006 [6 ♀, UCRC]; 3–10.i.2006 [13 ♀, 7 ♂: CNCI (1 ♀, 1 ♂), MLPA (1 ♀, 1 ♂), UCRC (11 ♀, 5 ♂)]; 10–17.i.2006 [2 ♀, UCRC]; 2–11.ii.2006 [4 ♀, UCRC]; 12–23.iii.2006 [1 ♂, UCRC]; 1–14.iv.2006 [3 ♀, 3 ♂, UCRC]; 16–28.iv.2006 [1 ♂, UCRC]. CORRIENTES, Yapeyú, exposed 19– 22.xii.2001, emerged 2.i.2002, G.A. Logarzo, V. Manrique, from sentinel eggs of Tapajosa rubromarginata (Signoret) [2 ♀, 1 ♂, UCRC] . MISIONES, Eldorado, exposed 8–11.ix.2004, emerged 1–5.x.2004, G.A. Logarzo, L. Varone (from sentinel eggs of T. rubromarginata ) [2 ♀, UCRC].

Redescription. FEMALE (holotype and non-type specimens). Body length 1000–1494 µm. Body and flagellum mostly brown to dark brown except petiole as well as base and very tip of gaster pale or yellowish; scape, pedicel and legs yellowish to light brown.

Antenna ( Fig. 228 ) with radicle about 0.3x total length of scape, rest of scape 2.6–3.1x as long as wide, faintly longitudinally striate; pedicel slightly longer than F1; F1 without mps, about as long as F8, F2–F5 more or less subequal in length (F3 slightly longer when bearing a mps), a little longer than following funicle segments; F2 either without or with 1 mps (a very short mps at apex of one antenna of holotype), F3 and F4 each usually with 1 mps (F3 occasionally without and F4 sometimes with 2 mps), F5–F8 each usually with 2 mps (F6 rarely with just 1 mps); clava with 8 mps, 3.1–3.9x as long as wide, about as long as combined length of F6–F8 or slightly shorter.

Mesosoma ( Fig. 230 ). Mesoscutum and scutellum almost smooth; propodeum ( Fig. 229 ) with slightly curved submedian carinae almost extending to propodeal anterior margin, smooth between them and also between submedian and lateral carinae. Forewing ( Fig. 231 ) 3.7–4.1x as long as wide; longest marginal seta about 0.25x maximum wing width; disc with a brown band behind and beyond stigmal vein and a much wider brownish band occupying entire apical third or so of the wing; mostly bare behind submarginal and marginal veins except for a few setae just behind apex of marginal vein, and densely setose elsewhere. Hind wing 21– 23x as long as wide; disc with a row of setae along each margin and a few additional setae, almost hyaline but with a slight brownish tinge basally and apically; longest marginal seta 2.5–2.8x maximum wing width.

Petiole 1.9–2.2x as wide as long; gaster longer than mesosoma; ovipositor about 0.9x length of gaster, notably exserted beyond gastral apex by 0.12–0.17x own length; 1.8–2.0x as long as mesotibia.

Measurements (µm) of the holotype. Total body length: 1494; head 203; mesosoma 505; petiole 39; gaster 744; ovipositor 836. Antenna: radicle 75; rest of scape 151; pedicel 64; F1 61; F2 85; F3 91; F4 88; F5 84; F6 76; F7 74; F8 63; clava 215. Forewing 1506:400; longest marginal seta 105. Hind wing 1132:54; longest marginal seta 133.

Description. MALE (previously unknown). Body length 1050–1240 µm. Similar to female except for normal sexually dimorphic features and the following. Forewing ( Fig. 232 ) about 4.0x as long as wide. Genitalia as in Fig. 233 .

Diagnosis. Gonatocerus (Cosmocomoidea) brachyurus is a member of the ater subgroup of the ater species group. It is a relatively large species that is recognizable by the forewing ( Fig. 231 ) having 2 brown bands on the disc and females having a long ovipositor that projects beyond the gastral apex by 0.12–0.17x own length ( Fig. 230 ). Males may be confused with the smaller males of G. (Cosmocomoidea) tuberculifemur (Ogloblin) , which have no distinct apical brown band on the forewing, and also with related forms, such as G. ( Cosmocomoidea ) sp. 3, which has a subapical brown spot rather than a band. It is also genetically distinct from G. tuberculifemur (de León et al. 2006c; Triapitsyn et al. 2008).

Distribution. NEOTROPICAL: Argentina.

Host. Tapajosa rubromarginata (Signoret) (Cicadellidae) [new record].

Figures

FIGURES 228 – 231. Gonatocerus (Cosmocomoidea) brachyurus ♀ (Tigre, Buenos Aires, Argentina): 228, antenna; 229, dorsellum and propodeum; 230, mesosoma and metasoma; 231, forewing.

FIGURES 232, 233. Gonatocerus (Cosmocomoidea) brachyurus ♂ (Tigre, Buenos Aires, Argentina): 232, forewing; 233, genitalia.